High power laser array with stable wavelength

Details High power laser array with stable wavelength High power laser array with stable wavelength

1990-09-10

1991-06-04

Davie, James W.

Coherent light generators

Particular pumping means

Pumping with optical or radiant energy

372 29, 372 32, 372 50, 372 96, H01S 308, H01S 3094

Patent

active

050220420

ABSTRACT:
A semiconductor diode laser is aligned to a waveguide with two sections, a first section being a passive low-loss waveguide and a second section being a Bragg grating. The first section works to increase the total cavity length l of the laser by about 1 to 2 cm. The lengthening of the cavity reduces the longitudinal mode spacing .DELTA..lambda. according to the equation .DELTA..lambda.=.lambda..sup.2 /2nl, and provides a higher average output power level because it is substantially immune to mode hop-induced fluctuations. The second section causes the output to be centered at the desired wavelength depending on the grating spacing. An array of diode lasers with an array of waveguides as described above provides a high power source with a controlled bandwidth. The high power laser array with stabilized output wavelength is used to pump a solid state laser crystal.

REFERENCES:
patent: 4803692 (1989-02-01), Sakano et al.
patent: 4870651 (1989-09-01), Taneya et al.
patent: 4914667 (1990-04-01), Blouder et al.

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