Vertical cavity surface emitting laser having intensity control

Details Vertical cavity surface emitting laser having intensity control Vertical cavity surface emitting laser having intensity control

1997-12-31

2000-05-30

Healy, Brian

Coherent light generators

Particular active media

Semiconductor

372 44, 372 46, 372 50, 372 99, 372103, 372 96, 372 49, H01S 318

Patent

active

060699051

ABSTRACT:
A vertical cavity surface emitting laser having intensity control for maintaining a constant proportional output under varying conditions of the laser. A tilted window is situated over the laser output to reflect a portion of the light to a photo detector area. Signals representing light on the photo detector go to a feedback circuit which controls the power output of the laser. The tilted window has a metallic coating for partial reflection and for minimizing polarization effects on reflected and transmitted light. The photo detector has an anti-reflective coating for likewise minimizing polarization effects of the detected light. The VCSEL and photo detector are situated on the same substrate.

REFERENCES:
patent: 5606572 (1997-02-01), Swirhun et al.
patent: 5737348 (1998-04-01), Smith
patent: 5761229 (1998-06-01), Baldwin et al.
patent: 5812582 (1998-09-01), Gilliland et al.
patent: 5835514 (1998-11-01), Yuen et al.

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