Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Broadband, electro-optic, dual-comb spectrometer for linear and nonlinear measurements



David Carlson, Daniel D. Hickstein, Scott Papp


We demonstrate a dual-comb spectrometer based on electro-optic modulation of a continuous-wave laser at 10 GHz. The system simultaneously offers fast acquisition speed and ultrabroad spectral coverage, spanning 120 THz across the near infrared. Our spectrometer is highly adaptable, and we demonstrate absorption spectroscopy of atmospheric gases and a dual-comb configuration that captures nonlinear Raman spectra of semiconductor materials via coherent anti-Stokes Raman scattering. The ability to rapidly and simultaneously acquire broadband spectra with high frequency resolution and high sensitivity points to new possibilities for hyperspectral sensing in fields such as remote sensing, biological detection and imaging, and machine vision.
Optics Express


frequency combs, nonlinear optics, spectroscopy, supercontinuum generation


Carlson, D. , Hickstein, D. and Papp, S. (2020), Broadband, electro-optic, dual-comb spectrometer for linear and nonlinear measurements, Optics Express, [online], (Accessed April 19, 2024)
Created September 28, 2020, Updated March 25, 2024