DocumentCode :
1195501
Title :
A Stabilized HCN Laser for Infrared Frequency Synthesis
Author :
Wells, Joseph S.
Volume :
22
Issue :
2
fYear :
1973
fDate :
6/1/1973 12:00:00 AM
Firstpage :
113
Lastpage :
118
Abstract :
Infrared frequencies have recently been synthesized in suitable diodes up to 88 THz with accuracies of parts in 109. Stabilized lasers are necessary in order to make frequency measurements of higher accuracy. The hydrogen-cyanide laser is the lowest frequency basis laser used in these synthesis schemes, and its stabilization has been the subject of recent interest. The laser is stabilized by locking it to a phase-locked microwave reference chain. Two servo loops are utilized. The first loop is a relatively slow frequency-lock loop with the correction applied to a piezoelectric-translator driver. This loop not only accommodates thermal expansion of the laser, but also serves as an acquisition aiding loop for the second servo. The latter is a phase-locked system with the correction applied to the laser discharge current controller. Data regarding the system stability are presented.
Keywords :
Control systems; Diodes; Frequency locked loops; Frequency measurement; Frequency synthesizers; Laser stability; Masers; Optical control; Servomechanisms; Thermal expansion;
fLanguage :
English
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9456
Type :
jour
DOI :
10.1109/TIM.1973.4314120
Filename :
4314120
Link To Document :
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