![]() ![]() ![]() Trex Select® railing is our simplest and most affordable high-performance system.Our highest-performance railing option offers more colors in more component profiles than any railing out there. Trex® Transcend railing offers nearly limitless opportunities to mix and match profiles and colors for a customized look.What's more, aluminum is a 100% recyclable and renewable resource and Trex Signature® is backed by the Trex Signature®/Reveal® Limited Warranty. Trex Signature® also performs equally well for residential or commercial settings. Trex Signature® aluminum railing offers minimalist style with maximum strength.Trex Enhance Basics decking comes in three traditional colors, and because the boards are scalloped, they’re lightweight for easy handling. Trex Enhance® Basics meld the durability of composite with the affordability of wood, resulting in long-lasting, worry-free decking.Note: Select boards are slightly thinner than all Transcend and Enhance decking to avoid tripping hazards, these collections should not be combined. With its nature-inspired, authentic wood-grain appearance and lightweight, scalloped profile for simple handling, this collection offers the beauty of wood with the ease of composite. The perfect pairing of price and minimal maintenance, Select is a simple choice, particularly if you want a composite board with a profile that not only resembles traditional lumber, but can also be used as cocktail railing.įor a multi-tonal look, opt for Enhance Naturals. If a classic solid is your style, Select Earth Tones deliver rich, opaque color to your yard. The question then becomes: what hue suits you? No matter which you choose, their fade and stain protections as well as enhanced mold and mildew resistance make maintenance simple. Our Trex Select® Earth Tones and Trex Enhance® Naturals collections both offer high performance in five versatile colors.Plus, Transcend deck boards offer the beauty of exotic wood-without the environmental strain of harvesting endangered forests. Engineered with a proprietary shell technology that protects against fading, staining, scratching, mold and mildew, Transcend decking offers elevated aesthetics paired with the highest level of performance. Trex Transcend® decking offers the broadest range of decking colors and finishes (including five Earth Tones and five Tropicals).Beyond that, Trex offers a variety of high-performance railing choices to meet different levels of style, performance and affordability. The protective shell technology means all of our deck boards resist staining, fading and cracking, with the highest level of scratch resistance available from our Transcend Earth Tones and Tropicals decking lines, followed by Select Earth Tones, Enhance Naturals and Enhance Basics. Trex high-performance decking and railing products combine low-maintenance upkeep and designminded style-all backed by our 25-year Limited Residential Warranty.
0 Comments
(templated) :type env_vars: dict :param secrets: Kubernetes secrets to inject in the container. :type name: str :param env_vars: Environment variables initialized in the container. :type startup_timeout_seconds: int :param name: name of the pod in which the task will run, will be used to generate a pod id (DNS-1123 subdomain, containing only ). :type labels: dict :param startup_timeout_seconds: timeout in seconds to startup the pod. :type volumes: list :param labels: labels to apply to the Pod. ![]() Includes ConfigMaps and PersistentVolumes. :type volume_mounts: list :param volumes: volumes for launched pod. :type ports: list :param volume_mounts: volumeMounts for launched pod. If more than one secret is required, provide a comma separated list: secret_a,secret_b :type image_pull_secrets: str :param ports: ports for launched pod. :type image_pull_policy: str :param image_pull_secrets: Any image pull secrets to be given to the pod. :type arguments: list :param image_pull_policy: Specify a policy to cache or always pull an image. (templated) The docker image's CMD is used if this is not provided. :type cmds: list :param arguments: arguments of the entrypoint. (templated) The docker images's entrypoint is used if this is not provided. :type name: str :param cmds: entrypoint of the container. :type image: str :param name: name of the pod in which the task will run, will be used (plus a random suffix) to generate a pod id (DNS-1123 subdomain, containing only ). Defaults to, but fully qualified URLS will point to custom repositories. :param image: Docker image you wish to launch. note:: If you use `Google Kubernetes Engine `_, use :class:`~_engine.GKEPodOperator`, which simplifies the authorization process. class KubernetesPodOperator ( BaseOperator ): # pylint: disable=too-many-instance-attributes """ Execute a task in a Kubernetes Pod. """Executes task in a Kubernetes POD""" import re import yaml from airflow.exceptions import AirflowException from 8s_model import append_to_pod from airflow.kubernetes import kube_client, pod_generator, pod_launcher from import Resources from airflow.models import BaseOperator from import apply_defaults from import validate_key from import State from airflow.version import version as airflow_version from _generator import PodGenerator from kubernetes.client import models as k8s See the License for the # specific language governing permissions and limitations # under the License. You may obtain a copy of the License at # Unless required by applicable law or agreed to in writing, # software distributed under the License is distributed on an # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY # KIND, either express or implied. The ASF licenses this file # to you under the Apache License, Version 2.0 (the # "License") you may not use this file except in compliance # with the License. ![]() See the NOTICE file # distributed with this work for additional information # regarding copyright ownership. # Licensed to the Apache Software Foundation (ASF) under one # or more contributor license agreements. ![]() If The Mac Starts Or Shuts Down In Safe Mode Enter your password, and the computer will reboot in normal mode.Or, from a terminal, type sudo nvram boot –arg=””, and press ENTER. Restart the computer without holding any key.Boot mode in the System Information window displays Safe.For example, graphics will use the default drives, and they won’t be accelerated. This is because many features are not available in safe mode. The words Safe Mode will appear in red in the menu bar.There are three ways to find out if safe mode OS X is on: the computer will reboot in safe mode.Or in verbose mode type sudo nvram boot –arg=”-x -v” and press ENTER. type sudo nvram boot –arg=”-x” and press ENTER.open a terminal from the Utilities menu.These steps apply to Mac operating system in its Leopard, Snow Leopard, Lion, Mountain Lion, Mavericks, Yosemite and El Capitan versions. Boot Mac in safe mode performs several checks, which requires time. release the SHIFT key when the login screen appears.ĭon’t worry if it takes longer than usual.(If you use OS X’s FileVault): release the key when the computer prompts you to unlock the key.press the SHIFT key after you hear the startup tone, but not before it.if the computer is on, shut it down, and wait ten seconds.How To Start Mac In Safe Modeīooting Mac in safe mode can be done in a few easy steps: ![]() OS X safe mode also disables user installed fonts. In addition, Mac safe mode prevents Startup items and login items from opening automatically. Mac OS X safe mode performs certain checks, such as verifying the startup disk, repairing directory problems, and loading the necessary kernel extensions. ![]() Safe mode OS X was designed for troubleshooting purposes. If the Bluetooth problem still exists, you can contact Apple Support, or make an appointment at the Genius Bar nearby.Mac safe mode, sometimes called safe boot, is a way to start up your Mac computer. To connect a device to a Mac, select the device, and then follow the on-screen instructions. If your Bluetooth devices are turned on, can be found on your Mac, and are in range, you should see them listed there. On macOS Catalina and earlier, choose Debug > Reset the Bluetooth module.Īfter resetting your Mac’s Bluetooth in System Preferences, the Bluetooth module on your Mac will be reset and returned to factory settings, so you’ll need to reconnect all wireless devices. Choose the hidden option labeled Reset the Bluetooth module.Press and hold the Shift and Option keys and click the Bluetooth icon in the menu bar.Tick the box next to Show Bluetooth in menu bar.Click the Apple menu and choose System Preferences.Click the Apple icon > Restart to complete your Bluetooth reset.Type “ sudo pkill bluetoothd” and press Enter on your keyboard.In the Utilities window, double-click Terminal to launch it.Reset Bluetooth Module on Mac macOS Monterey and later If you find yourself in this situation, you’ll need to reset the default settings on the Bluetooth module of your Mac. If it looks too complicated, don’t worry - try our handy tool, Cleaner One Pro, which can scan your mac quickly and solve multiple problems.īut sometimes, even these suggestions won’t help. To avoid any complications, you should first clear the Mac’s cache file before restarting the Bluetooth. ![]() Clearing the cache can help solve this problem. In some cases, applications will interfere with the operation of Bluetooth. Before trying to pair the device with a Mac or using the device again, try to leave an area that is known to cause interference. – Prevent Bluetooth interference: Bluetooth interference may be a factor too. If the device can’t be paired or it disconnects, move it closer to the Mac. – Close the device: Bluetooth can reach 30 feet, but don’t think it will always succeed. For details on device compatibility, refer to the device’s package or the manufacturer’s website. It is possible that the device requires a newer version of macOS or does not support the Mac at all, such as Apple Watch. – Check compatibility: If a Bluetooth device fails to link with your Mac, you should eliminate the possibility of compatibility issues. If you haven’t tried any troubleshooting for the problem device, we recommend that you read the following suggestions carefully before resetting Bluetooth on your Mac. Whether you need to connect a Bluetooth headset, pair a Bluetooth keyboard, uninstall a paired Bluetooth accessory, or pair a Bluetooth speaker, you may encounter all kinds of Bluetooth problems. Maybe you use Bluetooth devices every day without even noticing it. Bluetooth, often known as “personal area networks”, is a handy tool for short-distance communications. ![]() Received a FedEx door tag? Here's what you need to know. Please ensure that you enter only one door tag per line. You can enter any combination of up to 30 door tag tracking numbers at a time. If entering more than one door tag number, click on the underlined tracking number to get more details. ![]() ![]() Door tag numbers start with the letters "DT" followed by 12 numbers. You can enter any FedEx Express®, FedEx Express® Freight, FedEx Ground®, FedEx Home Delivery®, FedEx SmartPost®, FedEx Freight®, or FedEx Custom Critical® tracking numbers. Process is simple, you locate your tracking number in the email shipment confirmation, on your FedEx receipt or on the online store's order page and enter it into package search field above. Tracking FedEx packages from US is no different from tracking within US. The FedEx Return tracking number contains 20 digits, starting with “023” for Intelligent Mail package barcode (IMpb) barcodes or “58” for non-IMpb barcodesįedEx Tracking from US to UK, India, Mexico Locate FedEx Smartpost Returns tracking number (it's usually all digits like 02394653084833154920), enter it into package search field above and click Track Package. Track FedEx Smartpost Return by using our tracking service at or in our iOS/Android apps. Just enter your FedEx tracking number into search field above. You can check the status of your shipments 24/7 without having to call FedEx customer service. Track your shipment online, enter the 12-digit tracking number click on 'Track Package' to follow the progress of your shipment. Or you can try our simple tracking service without need to understand and find your way to package tracking on FedEx, USPS, UPS, etc. If you prefer to you can track directly with. Track FedEx Express, Ground, Freight, and Custom Critical.Įnter a FedEx tracking or Door Tag number into search field above, our service will get your package data from multiple Chinese delivery companies and will show your package status while it's traveling through China as well as when it arrives into your country.Įxpecting FedEx package from Hong Kong? Tracking FedEx shipment from Hong Kong SAR, China has never been easier. Where is my package? Enter your FedEx tracking number, track by reference, obtain proof of delivery, or TCN. Need the status of your shipment? Enter your tracking number above and click Track Package. Usually, your tracking number is printed on your shipping label, and will be automatically sent to you via email when you complete an eCommerce purchase, or will be provided when you ship a package at any FedEx location. Mostly, FedEx tracking numbers contain no letters. Each parcel is assigned a unique number, which is provided when you ship a package at a retail location, or after making an eCommerce purchase.įedEx assigns a 12-digit number, but there are also, 10-digit, 15-digit, 20-digit, and 22-digit numbers. The tracking number is a unique code where all the shipment details are encrypted. The entire tracking process is based on the FedEx tracking number. See all your shipments on one clear interface.Save your shipments for quick updates in near real time in our custom mobile app.Get an update in one click on the homepage.Track in near real time without logging in.Need the status of your shipment or a proof of delivery? Enter your tracking number number above.Įnter Tracking number to get your shipment status and obtain a proof of delivery. Track FedEx Express, Ground, Freight, and Custom Critical. Our guide covers the basics of finding the tracking number, where to track packages, and understanding status updates.Įnter your FedEx tracking number, track by reference, obtain proof of delivery, or TCN. This includes the signature image and associated shipment information. Signature proof of delivery is available for up to 18 months for FedEx Express and FedEx Ground shipments and 2 years for FedEx Freight shipments. You can use tracking to check the status of your shipment at any time during and within 90 days after delivery. FedEx Express is the world's largest express transportation company, providing fast and reliable services for more than 3.9 million shipments each business day. FedEx Express (formerly Federal Express) invented express distribution and remains the industry's global leader, providing rapid, reliable, time-definite delivery to more than 220 countries and territories. ![]() Jeep has remained not only consistent in their offerings, but also fluid enough to keep up with changing demands in the American automotive climate.įor 2016, Jeep has a wide array of product offerings, with one to suit just about every need. While we highly doubt that the brand will ever offer a compact car or minivan, we have enjoyed watching Jeep transform from a specialized off-road automotive name, to a fully functional everyday use vehicle brand. From small commuter crossovers, to high performance off-road machines, Jeep has managed to fill a niche in just about every aspect of the crossover SUV segment. Regardless of whether or not their evolution was fully grasped back then, the truth of the matter is, the Jeep brand has evolved into something pretty fantastic. It is probably a safe assumption that Jeep itself did not anticipate offering the wide range of vehicles it currently has in its lineup, when they first introduced the civilian Wrangler in 1945. That is just one reason why we love Jeep vehicles – trust us, the list goes on and on. Every Jeep dealer and Jeep driver here in the United States is never sure what the iconic brand will think up next. Struts, coil springs, anti-roll bar control arms, coil springs, anti-roll barġ1.8-in vented, disc 11.If there is one thing that Jeep does very well, it’s keeping us guessing. ![]() Struts, coil springs, anti-roll bar multilink, coil springs, anti-roll barġ1.8-in vented disc 12.0-in vented disc, ABSĭual front, front side, f/r curtain, driver kneeĭual front, f/r side, f/r head, front knee The system functions as if its software were ripped from a Palm Pilot it's inexcusable in a modern automobile-especially in one that sports such advanced semi-autonomous driving technology.Ĥ.86:1 (1, 2, 4, 5), 3.58:1 (3,6,7, R)/2.58:1 "Except the volume knob that is missing." Speaking of the knob, it's the CR-V's infotainment system that most betrays its age. "The seat offers up reasonable lateral support, the armrests are perfectly positioned, and everything falls neatly to hand," Markus said. "The cargo floor is so low compared to some others!" Gale said, later adding that the CR-V "offers one of the most functional cargo areas available in the segment." Behind the wheel, the Honda offers up a mature design that's aged well as this generation CR-V nears the end of its production cycle. The cavernous cargo hold also earned points for its low lift-over height. A packaging marvel if there ever were one, the CR-V's big back seat offered up enough room for 6-foot-tall adults, and it folded nearly flat with the flick of a lever in the cargo area. No matter how you slice it, the Honda CR-V's cabin was the roomiest. "There's quite a delay if you're pulling away from a stop." The transmission stutters on the freeway, too, where full-throttle maneuvers-like passing a big rig on a two-lane road-are met with massive engine revs before the transmission decides to downshift and engage, by which point the gap you were probably shooting for is all but gone. "Wide-open throttle performance is awful," Gale said. Wide-open throttle is where the Tucson's powertrain refinement is lacking. ![]() Around town or in light traffic on the highway, the powertrain is quite lovely the engine is punchy and quick to rev, and the transmission rattles off quick shifts without the lazy creeping that afflicts many dual-clutch transmissions in heavy stop-and-go traffic. The dual-clutch paired with a turbocharged, 1.6-liter I-4 that produces 175 hp mostly delivers on those promises, netting it the second-quickest acceleration here. ![]() Most here use either CVTs or six-speed automatics, but the Tucson gets a seven-speed twin-clutch gearbox, which Hyundai says is good for quicker acceleration and better fuel economy than a traditional automatic. The Hyundai Tucson's powertrain is a bit untraditional compared to the rest of its competitive set. ![]() That is why we’ve included both sight words and phonics in our hands-on Learn to Read Curriculum. The science of reading is clear that students should learn both phonics and sight words as part of a comprehensive learning-to-read program. While sight words are very important for early readers to memorize, it’s just as important (if not more) that students learn and understand phonics as well. This too is a very helpful list of sight words for students to learn. You might also know about Fry’s First 1000 Sight Words List! This list is similar to Dolch Sight Words and starts students in the first grade with Fry’s First 100. Whenever you decide your child is ready, we have many sight word worksheets, games and printables to help your students memorize these important words. Many families and teachers choose to wait to introduce sight words until the kindergarten or first-grade year. It is important to remember that these grade-level sight word lists are simply recommendations. We’ve created free sight word lists you can print and use with your students today! Why are Sight Words Important?īecause sight words cannot be sounded out, it’s important that students memorize them for fluid reading. Dolch sight words list: 1st grade High frequency words Irregular words Dolch Sight words Early reading 1st Grade sight words list ELA K-2 ELA 1st Grade overview The ability to decode words is crucial to reading, but a number of high frequency words are still worth learning whole. They are usually high-frequency words that appear often in student texts and grade-level sight word lists can be developed from them. Simply put, sight words are words that cannot be sounded out phonetically. Sight Word of the Week Kindergarten Curriculum (Dolch 220 Primer).Sight Word of the Week Preschool Curriculum (Dolch 220 PrePrimer).Editable Weekly Spelling Pack (1st-3rd) (Type Your Own Sight Words). ![]()
Please feel free to visit and read our original content. If you are seeing this on another website other than Tattoosday, without attribution, please note that it has been copied without the author's permission and is in violation of copyright laws. Thanks to "A" for sharing her cool healing tattoo with us here on Tattoosday! "A" credited the work to Tony Silva ( Electric Arrow Tattoo in Ronkonkoma, New York. it was kind of traumatic and I knew I was going to have to get used to talking about it, so the tattoo was kind of a good way to get used to talking about it with people and not being traumatized." It slid out from under me and I fell right on my elbow, completely shattered it and when they stitched me back up and put me together I wanted to get something around the scar. I had gone fifty miles that day and was two miles from my campsite and the bike hit some gravel. I was on this stretch of really gravelly highway by myself. "I was trying to go on a solo week-long bike trip around the Olympic Peninsula in Washington State and I was gonna bike around, put my gear on the back of my bike. ![]() ![]() ![]() "A" explained how this tattoo of a tree with roots came into being: it was the moment when I was looking at this bracelet." Thanks to Elsa for sharing this cool tattoo and the story behind it! That's why I have this.Īnd the bracelet is kind of connected to it because I was in Nepal a year ago and I was looking at jewelry on the street in Kathmandu, in the capital, and this guy comes up to me and he grabs my arm, and he's like ' so when are you going to close the circle?' And, you know it looks kind of like and. we all rely on our exteriors and I think that's something that I want to remind myself of. rely on yourself only for how you see the world and how you interact with yourself, as well. "This is sort of an ancient sign of a snake eating its own tail, ouroboros, and a lot of people have that as their tattoo.and it means, I think, a lot of different things in all these traditions that have used this symbol. She elaborated on the meaning of this simple design, as well as the bracelet below it:
Shop TCC for great deals on all our Ford. It wouldn't surprise me if I can take it to at least 15. Check out this Silver 2009 Ford Escape FWD 4dr V6 Auto XLT with Gray interior for sale in Smithville, Kansas City. 6,990 Fair Deal Free CARFAX Report Asheboro Chrysler Dodge Jeep Ram 3.7 (99 reviews) Check availability Show details View all 30 photos Used 2009 Ford Escape XLT 170,560 mi. I had hoped when I bought it that I would be able to drive it for at least 10 years. Visit Dahl Ford Onalaska in Onalaska WI serving La Crosse. 2009 Ford Escape Blue Automatic Nigerian Used. Used 2013 Ford F-150 XL 4 Door Extended Cab Truck Tuxedo Black Metallic for sale - only 19990. By far, the best feature is the combination of the ride/driving experience and the space available to carry things. OList offer latest Ford Escape 2009 price & for sale in Nigeria, you can sell or buy on OList Nigeria. The sound quality is perfect and the steering wheel controls are very comfortable to use. 10,999 Good Deal Free CARFAX Report Emmons Autoplex 4.7 (1,118 reviews) 167 mi. The SYNC that connects my phone to the stereo system is fabulous, so I did not continue with the Sirius membership. 1 / 23 Used 2009 Ford Escape XLS 84,986 mi. Average cost to fix: 3400 Like some similar Ford models, Escape transmissions were highly unreliable in the 2006-2009 models, with the most commonly-reported issue being major transmission failure. Seats are easy to get in and out of, though my 80+ mom now does take longer to be able to get in. The ride is fabulous, very smooth, but you can still feel the road. It did take me a little bit of time to get used to the engine turning off whenever I stopped the car, and it still makes some friends who ride with me a bit nervous. Shop Preowned Auto Sales for great deals on all our Ford inventory. On any given day, it might be a rolling craft store or class or a political campaign office. Check out this Black 2009 Ford ESCAPE XLS with Brown interior for sale in Uniontown. Year Minimum Year Maximum Year Make, Model & Trim Ford Models: Escape Escape Trims: Any Add Another Make Condition (1 selected) New Used Manufacturer Certified Third-Party Certified Certified Program Details Drive Type Price & Payments Min Price Max Price Max Payment Ex. The mileage has been great, especially for a small SUV. I had a non-hybrid Escape previously and was so happy to be able to upgrade when I could. You can easily find a great used Ford Escape at an equally amazing price with deals only BE FORWARD can offer.This has been my favorite car I've driven/owned. The Ford Escape is not without its share of features, which can include a sunroof, powered leather seating, power steering and windows, as well as central locking, steering wheel-mounted controls, air conditioning and updated inputs to connect your devices. Another attractive quality of the Ford Escape is its fuel economy, with a consumption rate of between 8km/l and 11km/l. In designing the Escape, Ford invested a great deal into both design style, as well as performance, as it delivers between 157 horsepower and 203 horsepower, depending on the model year and variation you choose. The Escape is only available in automatic transmission and 4WD drivetrain system to make sure that rough conditions are easily handled. Available transmissions include: 6-speed automatic. Choose between the inline-four or V6 engine if you're looking for some serious torque. The Used 2009 Ford Escape comes with front wheel drive, and all wheel drive. This includes hills, slopes, and even snow conditions. With the control track AWD system, the Escape can both handle smooth and rough terrains with ease. The Ford Escape model was developed by a joint program of Mazda and Ford as a sister car to the Mazda Tribute. ![]() The AI startup is growing quickly thanks to industry-best accuracy, an easy-to-use interface, and cutting-edge AI models such as Speaker Diarization, Topic Detection, Entity Detection, Automated Punctuation and Casing, Content Moderation, Sentiment Analysis, Text Summarization, and more. AssemblyAIĪssemblyAI, an API platform for state-of-the-art AI models, is a leading name in the Speech-to-Text API market. Let’s look at three of the most popular Speech-to-Text APIs and AI models with a free tier: AssemblyAI, Google, and AWS Transcribe. This means that the API or model is free for anyone to use up to a certain volume per day, per month, or per year. However, large scale use of APIs and AI models typically comes with a cost.īut if you’re looking to use an API or AI model for a small project or for a trial run, many of today’s Speech-to-Text APIs and AI models have a free tier. Learn more Free Speech-to-Text APIs and AI ModelsĪPIs and AI models are more accurate, easier to integrate, and come with more out-of-the-box features than open source options. Learn why AssemblyAI is the leading API platform for state-of-the-art AI models. azure-cognitiveservices-speech.Looking for a powerful Speech-to-Text API or AI model? To integrate the Speech SDK into the Express.js application, create a file in the src folder named azure-cognitiveservices-speech.js.Īdd the following code, immediately after the default root route, to pull in dependencies and create a function to convert text to speech. npm install microsoft-cognitiveservices-speech-sdkĬreate a Speech module for the Express.js app Install Cognitive Services Speech SDK for JavaScriptįrom the Visual Studio Code terminal, install the Azure Cognitive Services Speech SDK. Open a new terminal in Visual Studio Code and install the project dependencies. git clone Ĭhange to the new directory for the sample. Using git, clone the Express.js sample repo to your local computer. To upgrade to the latest version, run az upgrade. Run az version to find the version and dependent libraries that are installed.For more information about extensions, see Use extensions with Azure CLI. When you're prompted, install Azure CLI extensions on first use.See Sign in with Azure CLI for more sign-in options. To finish the authentication process, follow the steps displayed in your terminal. If you're using a local install, sign in with Azure CLI by using the az login command.If you prefer, install the Azure CLI to run CLI reference commands.Git - used to push to GitHub - which activates the GitHub action. ![]()
![]() In addition, two vibrational levels ( | 0 ⟩ n, | 1 ⟩ n) of a common motional mode of the ions in the trap are shown. ![]() Shown are the clock ground ( S 1 0) and excited ( P 3 0) clock states and an auxiliary metastable state ( P 3 1) together with the logic ion (qubit states | ↓ ⟩ L, | ↑ ⟩ L). Measurement of the frequency of a poorly known optical frequency source (e.g., previously measured at the resolution of a wave meter) can be determined by measuring the heterodyne beat between the frequency source and the frequency comb. Thus, by stabilizing f CEO and f rep to a well-known frequency reference, each comb mode frequency is well known. In this interferometer, one comb mode ν n is frequency doubled and heterodyne beat with the comb mode at twice the frequency ν 2 n. f CEO is given by the frequency of one mode of the comb (e.g., ν n) modulo f rep, and can be measured and stabilized with a f − 2 f interferometer. The relative carrier-envelope phase in the time domain is related to the offset frequency f CEO in the frequency domain. Each tooth in the comb, a particular single-frequency mode, is separated from its neighbor by f rep. ![]() (b) By Fourier transformation to the frequency domain, the corresponding frequency comb spectrum is revealed. Another important degree of freedom is the phase difference between the envelope maximum and the underlying electric field oscillating at the carrier optical frequency. (a) In the time domain, the laser output generates femtosecond pulse-width envelopes separated in time by 1 / f rep. |