Share Email Print

Optical Engineering

Liquid-nitrogen-cooled servo-stabilized Fabry-Pérot interferometer for the infrared
Author(s): Newrick K. Reay; Krzysztof A.R.B. Pietraszewski
Format Member Price Non-Member Price
PDF $20.00 $25.00

Paper Abstract

A cooled Fabry-Pérot etalon has been constructed for which the parallelism and mirror spacing can be servo-controlled and tuned using an existing commercially available etalon control system. Capacitance sensors monitor the mirror spacing and parallelism, and error signals produced as a consequence of changes in these values are used to stabilize the cavity with piezoelectric actuators. The etalon operates at liquid nitrogen temperature, has a free aperture of 50 mm and a nominal mirror spacing of 60 μm, and is coated for the 3- to 5-μm spectral region. Under servo-control at operating temperature, the response time of the etalon is 30 ms and the cavity tuning range is 6 μm, corresponding to ~ 3 orders of interference at the midrange wavelength of 4 μm.

Paper Details

Date Published: 1 August 1992
PDF: 4 pages
Opt. Eng. 31(8) doi: 10.1117/12.58705
Published in: Optical Engineering Volume 31, Issue 8
Show Author Affiliations
Newrick K. Reay, Queensgate Instruments Ltd. (United Kingdom)
Krzysztof A.R.B. Pietraszewski, Queensgate Instruments Ltd. (United Kingdom)

© SPIE. Terms of Use
Back to Top