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Proceedings Paper

Nd oscillator with fiber Q-switch
Author(s): Andreas Haase; Oliver Mehl
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Paper Abstract

Industrial and scientific applications require lasers with high beam quality in Q-switched operation. In oscillators the high reflecting mirror can be substituted by a phase conjugating mirror based on stimulated Brillouin scattering (SBS). Due to the nonlinear response of such a mirror not only the beam quality can be improved also Q-switching can be obtained with the same element. Up to now toxic liquids or gases under high pressure were used as SBS-media in pulsed solid state oscillators. These media can be substituted by a simple multimode fiber. A pulsed oscillator with a multimode fiber inside was realized. Nd:YALO was used as active medium. The flashlamp duration is about 140 microsecond(s) and the threshold energy for laser operation is 5 J. The repetition rate can be varied from 1 Hz up to 25 Hz. The energy per shot is about 16 mJ. Due to the relatively low SBS threshold a burst of Q-switched pulses per flashlamp shot occurs. The pulse width can be varied between 0.5 ns and 10 ns which depends on the used resonator configuration and the fiber.

Paper Details

Date Published: 13 May 1998
PDF: 7 pages
Proc. SPIE 3267, Laser Resonators, (13 May 1998); doi: 10.1117/12.308116
Show Author Affiliations
Andreas Haase, Technische Univ. Berlin (Germany)
Oliver Mehl, Technische Univ. Berlin (United States)


Published in SPIE Proceedings Vol. 3267:
Laser Resonators
Alexis V. Kudryashov; Pierre Galarneau, Editor(s)

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