Passively Q-switched laser with a dual-cavity configuration

Details Passively Q-switched laser with a dual-cavity configuration Passively Q-switched laser with a dual-cavity configuration

1996-02-22

1997-10-07

Scott, Jr., Leon

Coherent light generators

Particular beam control device

Control of pulse characteristics

372 99, 372 10, 372 97, 372 92, H01S 310

Patent

active

056755961

ABSTRACT:
The present invention relates to a passively Q-switched laser with a dual-cavity configuration to obtain a symmetrical laser pulse with a short and variable pulse width. The passively Q-switched laser comprises: a laser medium and a passively Q-switching medium; a cavity mirror capable of fully reflecting the respective wavelengths emitted from the laser medium and the passively Q-switching medium; a main cavity mirror composed of a dichroic mirror having non-reflective characteristics for the light emitted from the passively Q-switching medium and reflective characteristics for the light emitted from the laser medium with a reflectivity of 10% or more; and, an auxiliary cavity mirror composed of a dichroic mirror having non-reflective characteristics for the light emitted from the laser medium and reflective characteristics for the light emitted from the passively Q-switching medium with a reflectivity of 10% or more and capable of moving transversely against the laser beam.

REFERENCES:
patent: 5133077 (1992-07-01), Zayhowski et al.
patent: 5195104 (1993-03-01), Geiger et al.
patent: 5394413 (1995-02-01), Zayhowski
Kong et al., Forced Turn-off a Passively Q-Switched Nd: YAG Pulse by Restoration of Saturable Loss by the Use of an Auxiliary Cavity, Optics Letters, 20(8): 884-886 (1995).
Kim et al., A Passively Q-Switched Nd:YAG Laser with a Variable Pulse Width Using LiF:F.sub.2 -Color-Center Crystal in a Dual-Cavity Configuration, Jpn. J. Appl. Phys., 34: L303-L305 (1995).

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