Journal article
Electronic subtracter for trace-gas detection with InGaAsP diode lasers.
Abstract
An electronic noise-cancellation scheme has been developed and tested for second-harmonic (2f) detection with short-external-cavity and distributed-feedback InGaAsP diode lasers and wavelength modulation. The 2f background signal and noise from, e.g., optical feedback, optical fringes, and power-supply pickup are effectively reduced by subtraction of a measure of the signal-beam photocurrent from a measure of the reference-beam photocurrent. …
Authors
Zhu X; Cassidy DT
Journal
Applied Optics, Vol. 34, No. 36, pp. 8303–8308
Publisher
Optica Publishing Group
Publication Date
December 20, 1995
DOI
10.1364/ao.34.008303
ISSN
1559-128X