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Title: Electron beam pumped tunable excimer lasers

Abstract

Laser characteristics were studied extensively for the broadband rare gas halide excimers Xe/sub 2/Cl, Kr/sub 2/F, and XeF (C ..-->.. A). The trimer Kr/sub 2/F was first observed to lase during these investigations, while Xe/sub 2/Cl and XeF (C ..-->.. A) had been previously demonstrated. Since all three excimers have unbound ground states, a spectrally wide emission bandwidth is available for wavelength tuning. Several system parameters were studied for each of the lasers. These included mixture optimization, variation of optical resonator configuration, and influence of different halogen donors and buffer gases. Tuning was accomplished by using cavity mirrors with different center wavelengths. The trimer Xe/sub 2/Cl had a nominal peak wavelength of 518 nm, with a tuning range of approx. 15 nm and a ..delta..lambda of 20 nm (FWHM). Laser pulse widths were about 36 nsec, and were delayed by 35 nsec from the e-beam excitation current pulse. Kinetics of Xe/sub 2/Cl* were also studied, with the following results: a radiation lifetime of 135 (+75-60) nsec; a CCl/sub 4/ quenching constant of 6 +- 1 x 10/sup -10/ cm/sup 3/ sec/sup -1/; a xenon quenching constant of < 5 x 10/sup -13/ cm/sup 3/ sec/sup -1/; an argon quenching constantmore » of 3 +- 1 x 10/sup -14/ cm/sup 3/ sec/sup -1/; and a formation constant (from XeCl* via Xe and Ar collisions) of 1.5 + -0.5 x 10/sup -31/ cm/sup 6/ sec/sup -1/. The triatomic excimer Kr/sub 2/F lased at 436 nm with a ..delta..lambda of 25 nm. The pulse duration was approx. 50 nsec, with a delay of 35 nsec for the onset of laser action. Atomic absorptions by krypton metastables were identified in the laser spectrum. The dimer XeF (C ..-->.. A) had the largest laser output intensity. The peak wavelength was 486 nm, with a ..delta..lambda of 10 nm and a tuning range of 30 nm. Pulse duration was approx. 30 nsec.« less

Authors:
Publication Date:
OSTI Identifier:
5431946
Resource Type:
Thesis/Dissertation
Resource Relation:
Other Information: Thesis (Ph. D.)
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; GAS LASERS; FREQUENCY SELECTION; PERFORMANCE; TUNING; DIMERS; ELECTRON BEAM PUMPING; EXCITED STATES; KRYPTON FLUORIDES; OPERATION; WAVELENGTHS; XENON CHLORIDES; XENON FLUORIDES; CHLORIDES; CHLORINE COMPOUNDS; ELECTRICAL PUMPING; ENERGY LEVELS; FLUORIDES; FLUORINE COMPOUNDS; HALIDES; HALOGEN COMPOUNDS; KRYPTON COMPOUNDS; LASERS; PUMPING; RARE GAS COMPOUNDS; XENON COMPOUNDS; 420300* - Engineering- Lasers- (-1989)

Citation Formats

Smayling, M C. Electron beam pumped tunable excimer lasers. United States: N. p., 1981. Web.
Smayling, M C. Electron beam pumped tunable excimer lasers. United States.
Smayling, M C. Thu . "Electron beam pumped tunable excimer lasers". United States.
@article{osti_5431946,
title = {Electron beam pumped tunable excimer lasers},
author = {Smayling, M C},
abstractNote = {Laser characteristics were studied extensively for the broadband rare gas halide excimers Xe/sub 2/Cl, Kr/sub 2/F, and XeF (C ..-->.. A). The trimer Kr/sub 2/F was first observed to lase during these investigations, while Xe/sub 2/Cl and XeF (C ..-->.. A) had been previously demonstrated. Since all three excimers have unbound ground states, a spectrally wide emission bandwidth is available for wavelength tuning. Several system parameters were studied for each of the lasers. These included mixture optimization, variation of optical resonator configuration, and influence of different halogen donors and buffer gases. Tuning was accomplished by using cavity mirrors with different center wavelengths. The trimer Xe/sub 2/Cl had a nominal peak wavelength of 518 nm, with a tuning range of approx. 15 nm and a ..delta..lambda of 20 nm (FWHM). Laser pulse widths were about 36 nsec, and were delayed by 35 nsec from the e-beam excitation current pulse. Kinetics of Xe/sub 2/Cl* were also studied, with the following results: a radiation lifetime of 135 (+75-60) nsec; a CCl/sub 4/ quenching constant of 6 +- 1 x 10/sup -10/ cm/sup 3/ sec/sup -1/; a xenon quenching constant of < 5 x 10/sup -13/ cm/sup 3/ sec/sup -1/; an argon quenching constant of 3 +- 1 x 10/sup -14/ cm/sup 3/ sec/sup -1/; and a formation constant (from XeCl* via Xe and Ar collisions) of 1.5 + -0.5 x 10/sup -31/ cm/sup 6/ sec/sup -1/. The triatomic excimer Kr/sub 2/F lased at 436 nm with a ..delta..lambda of 25 nm. The pulse duration was approx. 50 nsec, with a delay of 35 nsec for the onset of laser action. Atomic absorptions by krypton metastables were identified in the laser spectrum. The dimer XeF (C ..-->.. A) had the largest laser output intensity. The peak wavelength was 486 nm, with a ..delta..lambda of 10 nm and a tuning range of 30 nm. Pulse duration was approx. 30 nsec.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1981},
month = {1}
}

Thesis/Dissertation:
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