Two-dimensional phase locked semiconductor laser array

Details Two-dimensional phase locked semiconductor laser array Two-dimensional phase locked semiconductor laser array

1986-03-17

1988-03-08

LaRoche, Eugene R.

Coherent light generators

Particular active media

Semiconductor

372 50, 372108, 372 99, 372 98, H01S 319, H01S 308

Patent

active

047303255

ABSTRACT:
A phase locked two-dimensional semiconductor laser array is disclosed that emits a unified wavefront using columns of individual lasers, each laser having a slant mirror between it and other lasers in its column. The individual lasers are all evanescently coupled to the neighboring lasers. The slant mirrors reflect the light from the lasers next to it upwards out of the face of the array. The phase locking is accomplished by the evanescent wave coupling. The plane (uniform) wavefront is accomplished by the design of the array in which: each laser in an i.sup.th column forms an optical path length of x.sub.i with the slant mirror adjacent to it; and the optical path length between mirrors and lasers in the (i+l).sup.th column is given by: x.sub.i =x.sub.i+l .+-.n(.lambda./2) where .lambda. equals a measure of wavelength of the light transmitted out of the array, and n is an odd integer.

REFERENCES:
patent: 4633476 (1986-12-01), Scifres et al.

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