Semiconductor device with a laser and a photodetector in a commo

Details Semiconductor device with a laser and a photodetector in a commo Semiconductor device with a laser and a photodetector in a commo

1996-07-26

1998-08-25

Davie, James W.

Coherent light generators

Particular active media

Semiconductor

372 96, H01S 319

Patent

active

057990301

ABSTRACT:
A laser and photodetector are combined in a common package. This permits the photodetector to monitor the light intensity emitted by the laser. The laser and photodetector can be produced monolithically on a common chip to improve the accuracy of positioning of the various components. The device can be disposed within a common container having a window through which the emitted light passes. The window can be configured to have inside and outside surfaces that selectively reflect a portion of the light back to the photodetector while transmitting the remaining portion of the light through the window to a phototransmissive device, such as an optical fiber. The light reflected back to the photodetector can be focused in a predetermined pattern to cause the light to be accurately received by the photodetector and not fall on the laser.

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