Broadly tunable, high repetition rate solid state and dye lasers

Details Broadly tunable, high repetition rate solid state and dye lasers Broadly tunable, high repetition rate solid state and dye lasers

1989-09-26

1992-08-04

Davie, James W.

Coherent light generators

Particular beam control device

Tuning

372 71, 372 92, 372102, 372108, H01S 310

Patent

active

051365960

ABSTRACT:
Solid state and dye lasers are described which are tunable over a wide spectral region, are operable at high repetition rate, are uniformly narrow in spectral width over the tuning range, and produce a spatially uniform, single longitudinal mode beam. In one embodiment having a simple grazing-incidence cavity, the laser comprises: (a) a longitudinal pump beam with a KiloHertz (KHz) repetition rate; (b) a resonating cavity comprising a first fixed mirror, a diffraction grating, and a second rotatable mirror; and (c) an active solid state or dye medium within the cavity. In this embodiment, (i) the pump beam is passed through the fixed mirror and directed at the active medium; (ii) the emission from the active medium strikes the grating near a grazing angle; (iii) the rotatable mirror is placed at a first order diffraction position from the grating and reflects the desired wavelength radiation back into the cavity; and (iv) the output is derived from the grating at the zeroeth diffraction order.

REFERENCES:
patent: 4229710 (1980-10-01), Shoshan
patent: 4559500 (1985-12-01), McDermid et al.
patent: 4761786 (1988-08-01), Baer
patent: 4847850 (1989-07-01), Kafka et al.
patent: 4873692 (1989-10-01), Johnson et al.
patent: 4894831 (1990-01-01), Alfrey
patent: 4901322 (1990-02-01), Kangas
patent: 4932031 (1990-06-01), Alfano et al.
Daneshuar-Hossein et al., "A Microprocessor-controlled laser grating system for laser tuning", Optics and Laser Technology, Jun. 1982, pp. 137-142.

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