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Related Concept Videos

IR Spectrometers01:25

IR Spectrometers

There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...

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Related Experiment Video

Updated: Jun 22, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Long term comparison of two fiber based frequency comb systems.

Philipp Kubina, Peter Adel, Florian Adler

    Optics Express
    |June 5, 2009
    PubMed
    Summary

    Mode-locked erbium-doped fiber lasers serve as excellent optical frequency comb generators. Two fiber combs achieved agreement within 6x10-16 for optical frequency measurements, marking a first for fiber-based comb comparisons.

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    Area of Science:

    • Physics
    • Optical Engineering
    • Metrology

    Background:

    • Mode-locked fiber lasers are crucial for generating optical frequency combs.
    • Optical frequency metrology relies on precise frequency measurements.

    Purpose of the Study:

    • To compare the performance of two distinct fiber-based frequency combs.
    • To validate the accuracy of fiber frequency combs in optical metrology.

    Main Methods:

    • Utilized mode-locked erbium-doped fiber lasers as frequency comb generators.
    • Performed independent optical frequency measurements using two separate fiber combs.
    • Directly compared the measurement results from both combs.

    Main Results:

    • Achieved agreement between the two fiber frequency combs within 6x10-16.
    • This represents the first direct comparison of two fiber-based frequency combs.

    Conclusions:

    • Fiber-based frequency combs demonstrate high precision and agreement for optical frequency metrology.
    • The results validate the use of these combs for advanced frequency measurements.