PERFORMANCE-MODEL FOR OPTICAL EXTRACTION FROM A Q-SWITCHED CHEMICAL OXYGEN IODINE LASER

被引：3

作者：

COPELAND, DA

BAUER, AH

JONES, KD

机构：

[1] Rocketdyne Division, Rockwell International, Canoga Park, CA, 91309

来源：

APPLIED OPTICS | 1993年 / 32卷 / 09期

关键词：

TIME-DEPENDENT LASER PERFORMANCE MODEL; Q SWITCHING; CHEMICAL OXYGEN IODINE LASER; OPTICAL EXTRACTION; FLOW-INDUCED RELAXATION OSCILLATIONS;

D O I：

10.1364/AO.32.001531

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A comprehensive time-dependent model for optical extraction from a Q-switched supersonic oxygen-iodine laser is described. Gas flow is treated by using an unsteady, premixed, quasi-one-dimensional model that accounts for gas motion and expansion as well as heat release in the cavity. The model uses a simplified, temperature-dependent, chemical kinetics package that consists of several reactions among the 3SIGMA, 1DELTA, and 1SIGMA states of oxygen, atomic and molecular iodine, water, and helium. Hyperfine relaxation effects on the gain and optical extraction from the 3 --> 4 line are treated by using a simple four-level laser model. An efficient algorithm for solving the coupled medium and optical extraction equations is described. This gain model, in conjunction with a geometric model of an unstable confocal resonator, is used to examine optical extraction from the medium as a function of pulse repetition rate, duty cycle, and optical mode width. It is shown that the output power may exhibit flow-induced relaxation oscillations, and the conditions under which these oscillations occur are discussed.

引用

页码：1531 / 1546

页数：16

共 41 条

[11]

COPELAND DA, 1989, 89102AB107 ROCKW INT

[12]

DONOUGH JM, 1990, MAR UCLA SHORT COURS

[13]

Emanuel G., 1976, Handbook of chemical lasers, P469

[14]

FLETCHER CAJ, 1988, SPRINGER SERIES COMP, V1

[15]

FLETCHER CAJ, 1988, SPRINGER SERIES COMP, V2

[16] RESONANT MODES IN A MASER INTERFEROMETER [J].

FOX, AG ;

LI, T .

BELL SYSTEM TECHNICAL JOURNAL, 1961, 40 (02) :453-+

[17]

GAMIZ VL, 1986, P SOC PHOTOOPT INSTR, V642, P189

[18] CHAIN-REACTION MECHANISM FOR I-2 DISSOCIATION IN THE O-2(1-DELTA)-I ATOM LASER [J].

HEIDNER, RF ;

GARDNER, CE ;

SEGAL, GI ;

ELSAYED, TM .

JOURNAL OF PHYSICAL CHEMISTRY, 1983, 87 (13) :2348-2360

[19]

Highland R., 1990, Proceedings of the SPIE - The International Society for Optical Engineering, V1225, P512, DOI 10.1117/12.18521

[20]

HURLOCK S, 1985, AFWLTR8437 US AIR 1

← 1 2 3 4 5 →