Semiconductor laser device
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 10, 1993
Grant Date -
N/A
app pub date -
Oct 18, 1991
filing date -
Oct 19, 1990
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A semiconductor laser device comprises: an active layer; a lower clad layer provided below the active layer; an upper clad layer provided above the active layer; and a current blocking layer, provided above the upper clad layer, for limiting an active region of the active layer in a direction along a width to make the active region of a striped form which has a wide portion and a narrow portion. According to the device, coherence of an oscillated laser beam is reduced, thereby to decrease a feedback induced noise when used for a pickup of an optical information recording/reproducing apparatus.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully