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Related Experiment Video

Updated: Aug 10, 2025

Multiplex Chemical Imaging Based on Broadband Stimulated Raman Scattering Microscopy

Multiplex Chemical Imaging Based on Broadband Stimulated Raman Scattering Microscopy

Published on: July 25, 2022

Single-modulator, direct frequency comb spectroscopy via serrodyne modulation.

D A Long, S M Bresler, Y Bao

|February 15, 2023

Summary

This summary is machine-generated.

This study replaces acousto-optic modulators with electro-optic phase modulators for frequency comb spectroscopy. This innovation simplifies spectrometer production and reduces phase noise in photonic devices.

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Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Area of Science:

Photonics
Spectroscopy
Optical Engineering

Background:

Traditional electro-optic frequency comb spectrometers utilize acousto-optic modulators (AOMs) for frequency shifting.
AOMs introduce differential frequency shifts between probe and local oscillator (LO) paths in interferometers.

Purpose of the Study:

To demonstrate an alternative to AOMs in electro-optic frequency comb spectrometers.
To reduce phase noise and simplify the production of integrated photonic comb spectrometers.

Main Methods:

Replacing acousto-optic modulators (AOMs) with electro-optic phase modulators (EOMs).
Driving the EOM with a sawtooth waveform to achieve serrodyne modulation.
Utilizing a single dual-drive Mach-Zehnder modulator (DD-MZM) for the modulation.

Main Results:

The proposed method enables direct frequency comb spectroscopy.
Lower differential phase noise is achieved compared to AOM-based systems.
The approach facilitates simpler chip-scale integration of photonic comb spectrometers.

Conclusions:

Electro-optic phase modulators driven by sawtooth waveforms offer a viable alternative to AOMs.
This technique enhances the performance and manufacturability of frequency comb spectrometers.
The findings pave the way for more compact and efficient integrated photonic devices.