Low pump power performance of optoacoustic discriminator for CH sub 3 OH FIR laser

Journal Article · Fri Sep 01 04:00:00 EDT 1989 · Review of Scientific Instruments; (USA)

DOI:https://doi.org/10.1063/1.1140610· OSTI ID:5552187

Wallace, T L; Ventrice, C A ^[1]

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1. Electrical Engineering Department, Tennessee Technological University, Cookeville, Tennessee 38505 (US)

The resonance enhancement of an optoacoustic signal is used to obtain a reliable discriminator in order to stabilize the output frequency of a CO{sub 2} laser. The CO{sub 2} laser is maintained on the 9{ital P}(36) emission line, the methyl alcohol vapor pressure within the acoustic cell is maintained at a value {ital p}{sub {ital g}} =1 Torr, and the chopper frequency is fixed at the fundamental longitudinal resonant frequency of the cylindrical resonator throughout the experiment. Utilizing a back electret condenser microphone to detect the optoacoustic signal, a reliable discriminator is obtained for a value of pump power as low as 10 mW.

• OSTI ID: 5552187
• Journal Information: Review of Scientific Instruments; (USA), Journal Name: Review of Scientific Instruments; (USA) Vol. 60:9; ISSN RSINA; ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
AUGMENTATION
CARBON DIOXIDE LASERS
DISCRIMINATORS
ELECTROMAGNETIC RADIATION
ELECTRONIC CIRCUITS
FAR INFRARED RADIATION
GAS LASERS
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROXIDES
INFRARED RADIATION
LASERS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PERFORMANCE
PHYSICAL PROPERTIES
RADIATIONS
RESONANCE
SIGNAL-TO-NOISE RATIO
STABILIZATION
THERMODYNAMIC PROPERTIES
TUNING
VAPOR PRESSURE