Beam columnation using multiple coupled elements

Details Beam columnation using multiple coupled elements Beam columnation using multiple coupled elements

H - Electricity

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H01S 5/42 (2006.01) H01S 5/12 (2006.01) H01S 5/187 (2006.01) H01S 5/40 (2006.01) H01S 5/10 (2006.01)

Patent

CA 1057839

ABSTRACT OF THE INVENTION An electrically pumped, distributed feedback laser having all side surfaces of the active laser medium cleaved and a periodic structure at a 45° angle to all of the cleaved surfaces. Current confining channels restrict pumping current to selected regions of the active laser medium to provide sufficient feedback such that two parallel filamentary areas of the active medium lase. By having multiple lasing fila- ments the divergence of the output beam in the direction of the width of the filaments is reduced by a factor proportional to the number of filamentary lasing areas.

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