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.

Weak value thermostat with 0.2 mK precision

Published

Author(s)

Patrick F. Egan, Jack A. Stone Jr.

Abstract

A new laser-based thermostat sensitive to 0.2 mK at room temperature is reported. The method utilizes a fluid-filled prism and interferometric weak value amplification to sense nanoradian deviations of a laser beam: due to the high thermooptic coefficient of the fluid (colorless fluorocarbon), the deviation angle through the prism is sensitive to temperature. We estimate the daily stability of our device to be 0.2 mK which is limited by drifts in the apparatus, and the narrow 20 mK capture range is the price paid for the weak measurement.
Citation
Optics Letters
Volume
37
Issue
23

Keywords

Interferometry, Temperature, Thermo-optical materials, Prisms

Citation

Egan, P. and Stone, J. (2012), Weak value thermostat with 0.2 mK precision, Optics Letters, [online], https://doi.org/10.1364/OL.37.004991 (Accessed August 9, 2022)
Created December 1, 2012, Updated November 10, 2018