Paper
10 February 1995 Some new possibilities to design frequency-tunable lidars in the IR (2-14 μm)
Gennady I. Freidman, Guerman A. Pasmanik, Alexander A. Shilov, Darrel G. Peterson
Author Affiliations +
Proceedings Volume 2366, Optical Instrumentation for Gas Emissions Monitoring and Atmospheric Measurements; (1995) https://doi.org/10.1117/12.205585
Event: Optical Sensing for Environmental and Process Monitoring, 1994, McLean, VA, United States
Abstract
Detection of different chemical species in the atmosphere is performed with a frequency- tunable middle IR laser. The design of lidar for this range is discussed. Two pulses can be used, one propagates to an object another provides receiving a reflected signal. When emitting, it is possible to start with YAG:Nd repetitively-pulsed solid-state laser radiation of 1.06 micrometers , 1 - 8 J, 10 - 100 Hz. The first pulse is further converted by OPO in 1.5 - 2.1 micrometers range and then into 4 - 14 micrometers radiation with SRS in hydrogen or other gases. To receive a weak reflected signal of 4 - 14 micrometers we propose using a hydrogen or other Raman amplifier which is pumped with the second OPO pulse (two pulses spaced by 2L/c, L being the distance from an object). A sensitivity for the method better than 10 photon per mode is achieved. For a wavelength less 4 micrometers it is possible to use only one OPO (for example by LiNbO3) as an emitter and receiver.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Gennady I. Freidman, Guerman A. Pasmanik, Alexander A. Shilov, and Darrel G. Peterson "Some new possibilities to design frequency-tunable lidars in the IR (2-14 μm)", Proc. SPIE 2366, Optical Instrumentation for Gas Emissions Monitoring and Atmospheric Measurements, (10 February 1995); https://doi.org/10.1117/12.205585
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KEYWORDS
Optical parametric oscillators

LIDAR

Signal detection

Atmospheric sensing

Absorption

Nonlinear crystals

Scattering

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