Ridge-type semiconductor laser element

Details Ridge-type semiconductor laser element Ridge-type semiconductor laser element

2005-01-25

2005-01-25

Harvey, Minsun Oh (Department: 2828)

Coherent light generators

Particular active media

Semiconductor

C372S046012

Reexamination Certificate

active

06847668

ABSTRACT:
The present invention provides a ridge-type semiconductor laser devise comprising: a lower cladding layer of a first conductivity type, an active layer, and a first upper cladding layer of a second conductivity type, which are sequentially stacked on a compound semiconductor substrate of the first conductivity type; a second upper cladding layer of the second conductivity type which has a ridge shape and is provided on the first upper cladding layer; and a contact layer of the second conductivity type provided on the second upper cladding layer. Current blocking layers are provided on the first upper cladding layer, alongside the second upper cladding layer. Respective sections of these current blocking layers that follow the sides of the second upper cladding layer are of the second conductivity type, and respective sections of these current blocking layers that follow the first upper cladding layer are of the first conductivity type.

REFERENCES:
patent: 4682337 (1987-07-01), Amann
patent: 4932033 (1990-06-01), Miyazawa et al.
patent: 5887011 (1999-03-01), Ohkura et al.
patent: 5940423 (1999-08-01), Sahara

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