Semiconductor diode laser with monitor diode

Details Semiconductor diode laser with monitor diode Semiconductor diode laser with monitor diode

1992-01-21

1993-03-02

Epps, Georgia Y.

Coherent light generators

Particular active media

Semiconductor

372 20, 372 45, 372 96, H01S 319

Patent

active

051915901

ABSTRACT:
A semiconductor diode laser (1) with a monitor diode (2) includes a semiconductor body with a substrate (4) and a superimposed layer structure (5) having an active layer (6) and a pn junction (7) with which radiation (24) can be generated. The monitor diode (2) is separated from the diode laser by a groove (10) which extends into the substrate (4) and of which one of the walls forms an end face of the laser. The groove (10) and the monitor diode (2) are present at the side where the main radiation beam (24) emerges, while the active layer (6) extends over at most only a small portion, preferably at most 20%, of the length of the monitor diode (2). The length in the monitor diode over which absorption takes place is preferably smaller than the absorption length for the emitted laser radiation.

REFERENCES:
patent: 4653058 (1987-03-01), Akiba et al.
patent: 4719636 (1988-01-01), Yamaguchi
patent: 4788690 (1988-11-01), Akiba et al.
patent: 4899361 (1990-02-01), Numai
patent: 4920542 (1990-04-01), Brosson et al.
patent: 4995048 (1991-02-01), Kuindersma et al.
patent: 5088097 (1992-02-01), Ono et al.
patent: 5119393 (1992-06-01), Oka et al.

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