Controlled-linewidth laser source

Details Controlled-linewidth laser source Controlled-linewidth laser source

1982-11-10

1985-03-05

Davie, James W.

Coherent light generators

Particular active media

Semiconductor

372 19, 372 26, 372 32, 372 92, H01S 319

Patent

active

045035415

ABSTRACT:
Laser linewidth is controlled by reflecting a certain portion of the laser light back into the laser cavity. This control is accomplished by aligning the active layer on an electroabsorptive cell with the active layer of a semiconductor laser on a single substrate with a first waveguide therebetween. Light from the laser is guided by the first waveguide to the electroabsorptive cell whose light absorption is electronically controlled. The laser light propagates through the active region in the electroabsorptive cell and then is guided by a second waveguide to a reflection facet. The laser light is reflected by this reflection facet back through the waveguide-cell-waveguide-laser light path. The foregoing device can be formed using either a monolithic or a hybrid design.

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