Small signal gain and saturation intensity of 00° 1-[10°0, 02°0]I and IIvibrational band transitions in sealed-off CO2isotope lasers

Author

Freed, Lisa Ernestine ; Freed, Charles ; O´Donnell, Robert G.

Author_Institution

Massachusetts Institute of Technology, Cambridge, MA, USA

Volume

18

Issue

8

fYear

1982

fDate

8/1/1982 12:00:00 AM

Firstpage

1229

Lastpage

1236

Abstract

Effects due to Fermi resonance play a major role in determining the very significant variations of gain in the various CO2isotopes. We have measured the small signal gain coefficients and saturation parameters for five transitions ( $J= 12, 16, 20, 24, 28$ ) in each of the four rotational branches of the $00\\deg 1-[10\\deg 0, 02\\deg 0]$ I and IIvibrational bands using sealed-off TEMooqmode oscillators and amplifiers. Isotopic species of pure¹²C¹⁶O2,¹²C¹⁸O2,¹³C¹⁶O2,¹³C¹⁸O2, and¹⁴C¹⁶O2were measured with⁴He-¹⁴N2-Xe gas additives under identical conditions. Substitutions of either¹⁵N2or¹³C¹⁶O instead of¹⁴N2were also tried. The results obtained may serve as guidelines in the design of sealed-off CO2lasers and amplifiers.

Keywords

Carbon dioxide laser amplifiers; Carbon dioxide lasers; Gain measurement; Gas lasers; Isotopes; Laser stability; Laser transitions; Optical design; Power lasers; Power measurement; Resonance; Vibration measurement;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/JQE.1982.1071683

Filename

1071683