Miniature Talbot cavity for lateral mode control of laser array

Details Miniature Talbot cavity for lateral mode control of laser array Miniature Talbot cavity for lateral mode control of laser array

1989-10-30

1991-06-25

Gonzalez, Frank

Coherent light generators

Particular beam control device

Mode locking

372 19, 372 95, 372 99, 372101, 372108, 35016716, 350167, H01S 3098

Patent

active

050273590

ABSTRACT:
An apparatus for coherent beam combining of lasers and for lateral mode control is disclosed, comprising a miniature Talbot cavity having at least a first and second surface. The first surface is to receive light from said lasers, and the second surface contains a reflecting mirror. In one embodiment, the mirror spaced apart from said first surface by a distance Z=nd.sup.2 /.lambda. where n is a nonnegative integer, .lambda. is the laser wavelength, and d is the laser aperture spacing. In this embodiment, the mirror is divided into reflecting and non-reflecting portions, the reflecting portions patterned to reflect only that portion of the light from said lasers having a half-period shift corresponding to a fundamental lateral mode. In another embodiment, the mirror is spaced apart from the first surface by a distance Z, such that nd.sup.2 /.lambda.<Z<(n+1)d.sup.2 /.lambda., where n is a nonnegative integer, .lambda. is the laser wavelength, and d is the laser aperture spacing. In both embodiments, a lenslet array may be place to receive the light from the lasers, the lenslet array being separated from the mirror by the distance Z.

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