Passive Q switch laser device

Details Passive Q switch laser device Passive Q switch laser device

2005-09-06

2010-02-16

Rodriguez, Armando (Department: 2828)

Coherent light generators

Particular beam control device

Q-switch

C372S011000

Reexamination Certificate

active

07664148

ABSTRACT:
A laser apparatus10includes: a laser medium11arranged between a pair of reflecting means12A and12B of an optical resonator12and adapted to be excited to emit light; a saturable absorber14arranged on the optical axis L of the optical resonator12between the pair of reflecting means, the transmissivity thereof being adapted to increase with the absorption of emitted light21from the laser medium; and an excitation light source unit13adapted to output light22having a wavelength that excites the laser medium. The saturable absorber14is a crystalline body having first to third mutually perpendicular crystallographic axes and is arranged in the optical resonator12in such a manner as to have different transmissivities for emitted light in two mutually perpendicular polarization directions. In this case, a laser oscillation occurs for emitted light in the polarization direction that shows the greater transmissivity, and it is therefore possible to obtain laser beams having a stabilized polarization direction.

REFERENCES:
patent: 6804272 (2004-10-01), O'Gorman et al.
V. Kir'yanov, “Influence of passive shutter Cr4+:YAG nonlinear absorption anisotropy on output ergy and polarization state of neodymium laser at passive Q-switching,” Lasers and Electro Optics, EO/pacific rim '97 pacific rim conference, 1997, pp. 154-155.
N. N. Il'ichev, Nonlinear Absorption Anisotropy in YAG:V3+, QELS'96, QWE29 p. 133-134, 1996.
A. V. Kir'yanov, “Influence of passive shutter Cr4+:YAG nonlinear absorption anisotropy on output energy and polarization state of neodymium laser at passive Q-switching,” Lasers and Electro Optics, CLEO/pacific rim '97 pacific rim conference, 1997, pp. 154-155.
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A. V. Kir'yanov et al., “Second-harmonic generation by Nd3+:YAG/Cr4+:YAG-laser pulses with changing state of polarization,” J. Opt. Soc. Am. B, Oct. 2000, vol. 17, No. 10, pp. 1657-1664.
A. V. Kir'yanov et al., “SHG by a Nd3+:YAG/Cr4+:YAG laser pulse with changing-in-time polarization,” Advanced Solid-State Lasers, 2002, vol. 68, pp. 88-92.
N. N. Il'ichev et al., “An Influence of Passive Shutter Cr4+:YAG Latent Anisotropy on Output Energy and Polarisation Characteristics of Neodymium Laser at Passive Q-Switching,” OSA TOPS vol. 10 Advanced Solid State Lasers, 1997, pp. 137-140.

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