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.

Ultra-low Power Dual Frequency Comb Ranging

Published

Author(s)

Emily Caldwell, Laura Sinclair, Jean-Daniel Deschenes, Nathan R. Newbury

Abstract

Dual comb ranging is a well-established method of laser-based ranging that exploits frequency combs to provide absolute, high-precision measurements. It suffers, however, from a significant power penalty when compared with conventional FMCW LIDAR. Here, we demonstrate >25 dB improvement in the minimum received powers needed for dual comb ranging. Under our operating conditions, the minimum received power drops from order 1 nW to 1 pW while maintaining a range precision of <6 μm at a 26 kHz update rate. In conventional dual comb ranging, a measurement comb is sent to the target and then mixed with a reference comb with an offset repetition rate. Here we do away with the repetition rate offset and instead run the reference comb as a tracking oscillator following the movement of the measurement comb's pulses. This work positions dual comb ranging as a promising method of high precision ranging in dynamic, power-starved environments.

Keywords

Dual-Comb Ranging

Citation

Caldwell, E. , Sinclair, L. , Deschenes, J. and Newbury, N. (2022), Ultra-low Power Dual Frequency Comb Ranging, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=935000 (Accessed February 25, 2024)
Created June 30, 2022, Updated March 28, 2023