Incoherent, optically uncoupled laser arrays for electro-optic l

Details Incoherent, optically uncoupled laser arrays for electro-optic l Incoherent, optically uncoupled laser arrays for electro-optic l

1987-10-01

1988-11-22

Goldberg, E. A.

Recorders

Printing, dotting, or punching marker

Ink transfer support or moving means

372 46, 372 48, 354 5, G01D 942, H01S 319

Patent

active

047869186

ABSTRACT:
An incoherent, optically uncoupled laser array for an electro-optic line modulator or a line printer or the like and comprising a plurality of spatial laser emitters characterized by having high power density and a uniform far field emission pattern. Structural means is provided in the array to permit the spacing of the emitters sufficiently close to provide a uniform far field emission pattern without permitting phaselocking between adjacent emitters of the array. The structural means may comprise geometric lateral and diagonal displacement of adjacent optical cavities of the laser elements. Alternatively, the structural means may comprise a plurality of spatially disposed isolation regions extending across the laser array and extending into the laser array a distance sufficient to optically isolate the optical cavities of the laser elements from one another and prevent optical coupling between adjacent laser elements. The spatial isolation regions may be formed into the fabricated laser array using impurity induced disordering (IID).

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"Phase-Locked Semiconductor Laser Array", D. R. Scifres et al., Applied Physics Letters; vol. 33(12), pp. 1015-1017 (12/15/78).

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