Single-modulator, direct frequency comb spectroscopy via serrodyne modulation

Published

February 3, 2023

Author(s)

David Long, Sean Bresler, Yiliang Bao, Benjamin Reschovsky, Thomas W. LeBrun, Jason J. Gorman

Abstract

Traditional electro-optic frequency comb spectrometers rely upon the use of an acousto-optic modulator (AOM) to provide a differential frequency shift between probe and local oscillator (LO) legs of the interferometer. Here we show that these modulators can be replaced by an electro-optic phase modulator (EOM) which is driven by a sawtooth waveform to induce serrodyne modulation. This approach enables direct frequency comb spectroscopy to be performed with a single dual-drive Mach–Zehnder modulator (DD-MZM), allowing for lower differential phase noise. Further, this method allows for simpler production of integrated photonic comb spectrometers on the chip scale.

Citation

Optics Letters

Volume

4

Issue

15

Pub Type

Journals

Download Paper

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Keywords

Optical frequency comb, accelerometry, serrodyne

Citation

Long, D. , Bresler, S. , Bao, Y. , Reschovsky, B. , LeBrun, T. and Gorman, J. (2023), Single-modulator, direct frequency comb spectroscopy via serrodyne modulation, Optics Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=935630 (Accessed October 8, 2025)