Light emitting apparatus

Details Light emitting apparatus Light emitting apparatus

1997-08-28

1999-03-23

Bovernick, Rodney

Coherent light generators

Particular active media

Semiconductor

372 96, H01S 319, H01S 308

Patent

active

058870130

ABSTRACT:
A light emitting apparatus having a surface emitting laser including a substrate, a first reflection layer, an active layer and a second reflection layer stacked successively on the substrate, first and second electrodes formed respectively on the lower surface of the substrate and a portion of the upper surface of the second reflective layer, to emit light in the direction of the stacked layers, and a monitoring photodetector stacked on the second reflection layer to detect the amount of the emitted light from the surface emitting laser, is provided. The monitoring photodetector includes first semiconductor material layer, an absorbing layer and second semiconductor material layer stacked successively on the second reflection layer, a third electrode formed on the second semiconductor layer to output detecting signals of the monitoring photodetector, and a controlling layer formed on the bottom of the absorbing layer to intercept some of the incident light.

REFERENCES:
patent: 5136603 (1992-08-01), Hasnain et al.
patent: 5574744 (1996-11-01), Gaw et al.
patent: 5577064 (1996-11-01), Swirhun et al.
patent: 5606572 (1997-02-01), Swirhun et al.
patent: 5757837 (1998-05-01), Lim et al.

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