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Proceedings Paper

High-power single-frequency tunable CW Er-fiber laser pumped Cr2+:ZnSe laser
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Paper Abstract

We demonstrate an Er-fiber-laser-pumped, CW, high-power, single-longitudinal-mode Cr2+:ZnSe laser, tunable in the 2- 3 &mgr;m spectral region. The laser is operating in a single longitudinal mode regime with a linewidth of 80-130 MHz over a 120 nm tuning range around 2.5 &mgr;m, and delivers up to 150 mW of output power. The laser design is very compact and is based on Kogelnik/Littman cavity configuration with the total optical length of the folded cavity of 10 cm. The narrow-linewidth output spectrum can be quickly scanned over a 10 nm spectral range with a repetition rate of 220 Hz by a piezo-controlled tuning mirror which allows for an extremely fast wavelength tuning of the output spectrum over a large number of absorption spectral lines of trace gases of interest. As a test experiment, we performed a Dopplerlimited- resolution intracavity laser absorption spectroscopy of ro-vibrational transitions of the &ngr;3 and &ngr;1 bands of H2O with minimum detectable absorption coefficient of ~3x10-7 cm-1, which corresponds to 9 parts per billion by volume water vapor detection limit. The laser is currently in active stage of development and its further optimization will allow for full 2-3 &mgr;m fast tuning range and Watt-level output powers. This laser is being designed as a seeding source for an OPG-OPA-based, highly sensitive trace-gas sensor system for real-time detection of gas traces of biological pathogens and explosives in the molecular fingerprint mid-IR spectral region of 2-10 &mgr;m.

Paper Details

Date Published: 10 May 2007
PDF: 5 pages
Proc. SPIE 6552, Laser Source Technology for Defense and Security III, 655210 (10 May 2007); doi: 10.1117/12.719434
Show Author Affiliations
Igor S. Moskalev, Univ. of Alabama at Birmingham (United States)
Vladimir V. Fedorov, Univ. of Alabama at Birmingham (United States)
Sergey B. Mirov, Univ. of Alabama at Birmingham (United States)

Published in SPIE Proceedings Vol. 6552:
Laser Source Technology for Defense and Security III
Gary L. Wood; Mark A. Dubinskii, Editor(s)

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