Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Incoherent optical heterodyne detection and its application to air pollution detection

Not Accessible

Your library or personal account may give you access

Abstract

Fundamental problems of incoherent optical heterodyne detection are analyzed. Output of the heterodyne detection depends on the spatial and temporal coherences of incoming incoherent signal light on the photodetector surface. The directivity of optical heterodyne detection is concluded to be the same as with that of direct detection in an ideal case in which the image of the object is well focused on the photodetector surface. This incoherent heterodyne detection is applied to air pollution monitoring. In the laboratory, the absorption spectra due to NH3, Freon, and SF6 are measured using an incoherent light source, and the concentrations of each gas were determined by using the least-squares method.

© 1978 Optical Society of America

Full Article  |  PDF Article
More Like This
Air pollution measurement by Fourier transform spectroscopy

Philip L. Hanst
Appl. Opt. 17(9) 1360-1366 (1978)

Signal-to-noise ratio in optical heterodyne detection for Gaussian fields

Takashi Takenaka, Kazumasa Tanaka, and Otozo Fukumitsu
Appl. Opt. 17(21) 3466-3471 (1978)

High sensitivity pollution detection employing tunable diode lasers

J. Reid, J. Shewchun, B. K. Garside, and E. A. Ballik
Appl. Opt. 17(2) 300-307 (1978)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (9)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (22)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved