Experimental study of gain and output coupling characteristics of a CW chemical oxygen-iodine laser

Gain and output coupling characteristics of the CW chemical oxygen-iodine laser (COIL) are determined experimentally by means of varying the output coupling method. Under the conditions that the Cl/sub 2/ flow rate is 11.8 mmol/s, the I/sub 2/ molar flow rate is from 20 to 50 mu mol/s, and the duct...

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Bibliographic Details
Published in:IEEE journal of quantum electronics 1991-06, Vol.27 (6), p.1265-1270
Main Authors: Schmiedberger, J., Kodymova, J., Spalek, O., Kovar, J.
Format: Article
Language:English
Subjects:
Chemical lasers
Dielectric loss measurement
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Gain measurement
Laser theory
Lasers
Mirrors
Optical coupling
Optics
Physics
Power generation
Power lasers
Power measurement
Propagation losses
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Summary:Gain and output coupling characteristics of the CW chemical oxygen-iodine laser (COIL) are determined experimentally by means of varying the output coupling method. Under the conditions that the Cl/sub 2/ flow rate is 11.8 mmol/s, the I/sub 2/ molar flow rate is from 20 to 50 mu mol/s, and the duct pressure is 200 Pa, the following were obtained from the experimental data: maximum values of output power of 58 W, and optimal output coupling factor of 1.50%, a resonator efficiency of 4.8%, an unsaturated small-signal gain of 1.55*10/sup -3/ cm/sup -1/, a threshold small-signal gain of 1.31*10/sup -3/ cm/sup -1/, a saturation intensity of 1150 W/cm/sup 2/, intraresonator losses of 9%, and an atomic iodine concentration of 2.85*10/sup 14/ cm/sup -3/. A comparison of these results to the published data of other COIL systems is presented.< >
ISSN:0018-9197
1558-1713
DOI:10.1109/3.89942