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Self-referenced frequency combs using high-efficiency silicon-nitride waveguides.

David R Carlson, Daniel D Hickstein, Alex Lind

|June 15, 2017

Summary

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Researchers developed a novel method for stabilizing fiber laser frequency combs using silicon nitride waveguides. This approach requires significantly lower optical power, enabling compact and cost-effective frequency comb systems for various applications.

Area of Science:

Photonics and Optical Engineering
Quantum Optics
Materials Science

Background:

Fiber laser frequency combs are crucial for precision measurements but often require high optical power and bulky setups.
Conventional self-referencing techniques for frequency stabilization are complex and power-intensive.

Purpose of the Study:

To demonstrate a low-power, chip-based self-referencing method for telecom-wavelength fiber frequency combs.
To leverage the high nonlinearity of silicon nitride waveguides for efficient supercontinuum generation and frequency stabilization.

Main Methods:

Utilized silicon nitride waveguides for supercontinuum generation with low optical power (<2 dB loss).
Achieved self-referencing by mixing dispersive-wave light with frequency-doubled laser output.

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Published on: June 8, 2018

Related Experiment Videos

Last Updated: Feb 28, 2026

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Published on: August 5, 2013

Implementation of a Reference Interferometer for Nanodetection

Implementation of a Reference Interferometer for Nanodetection

Published on: April 26, 2014

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Demonstrated direct f-to-3f self-referencing from the waveguide output at higher optical powers.

Main Results:

Generated a two-octave spectral broadening using only 110 pJ incident energy.
Required 10x lower optical power (11.3 mW) compared to conventional fiber-based methods.
Successfully demonstrated hybrid comb systems combining fiber laser performance with photonic waveguide advantages.

Conclusions:

Silicon nitride waveguides offer a highly nonlinear and compact platform for efficient frequency comb stabilization.
The developed method significantly reduces power requirements, paving the way for low-cost, portable, and space-borne frequency combs.