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Related Concept Videos

Generating Electromagnetic Radiations01:10

Generating Electromagnetic Radiations

The German physicist Heinrich Hertz (1857–1894) was the first to generate and detect certain types of electromagnetic waves in the laboratory. Starting in 1887, he performed a series of experiments that confirmed the existence of electromagnetic waves and verified that they travel at the speed of light. Hertz used an alternating-current RLC (resistor-inductor-capacitor) circuit that resonated at a known frequency and connected it to a loop of wire. High voltages induced across the gap in the...

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Related Experiment Video

Updated: Jun 19, 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

Efficient optical frequency-comb generator.

A S Bell, G M McFarlane, E Riis

    Optics Letters
    |October 29, 2009
    PubMed
    Summary
    This summary is machine-generated.

    We developed a new technique to efficiently transfer laser power into a wideband frequency comb. This method uses a coupled cavity to achieve a 1 THz comb bandwidth with 8.5% power efficiency.

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    Area of Science:

    • Optics
    • Laser Physics
    • Quantum Optics

    Background:

    • Frequency combs are crucial for precision measurement.
    • Efficiently generating wideband frequency combs is an ongoing challenge.
    • Existing methods often suffer from low power transfer efficiency.

    Purpose of the Study:

    • To demonstrate an efficient method for transferring power from a single-frequency laser into a wideband frequency comb.
    • To improve the power efficiency of frequency comb generation.
    • To generate a broadband frequency comb with a large mode span.

    Main Methods:

    • Utilized a 2.7-GHz electro-optic modulator within a resonant optical cavity.
    • Employed a coupled cavity technique for enhanced power transfer.
    • Characterized the generated frequency comb's bandwidth and mode count.

    Main Results:

    • Successfully transferred 8.5% of the input laser power into the frequency comb.
    • Generated a frequency comb spanning over 1 THz.
    • The comb comprised more than 400 distinct modes.

    Conclusions:

    • The coupled cavity technique offers an efficient pathway for frequency comb generation.
    • This method significantly enhances power transfer efficiency compared to conventional techniques.
    • The generated wideband frequency comb has potential applications in spectroscopy and metrology.