Semiconductor laser device and optical pickup apparatus...

Coherent light generators – Particular active media – Semiconductor

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C372S045010

Reexamination Certificate

active

11038702

ABSTRACT:
A semiconductor laser device has a striped structure for injecting carriers and includes a first electrically-conductive cladding layer, an active layer, and a second electrically-conductive cladding layer that are formed on a substrate. A width of the stripe changes along a resonator direction, a difference between L1 and Lt is within 200 μm, and Rf<Rr, where L1 is a distance from a front end face to a position at which the width of the stripe is minimal, L is a length of a resonator of the semiconductor laser device, Rf is a reflectivity of the front end face, Rr is a reflectivity of a rear end face, and Lt is a distance expressed by L×Loge(Rf)/Loge(Rf×Rr). The saturation of a light emission efficiency is suppressed in a high power operation, allowing a stable fundamental transverse mode oscillation.

REFERENCES:
patent: 6075801 (2000-06-01), Tamanuki
patent: 6104738 (2000-08-01), Kitoh et al.
patent: RE37051 (2001-02-01), Welch et al.
patent: 6459840 (2002-10-01), Sato et al.
patent: 6518159 (2003-02-01), Tsunoda
patent: 6928097 (2005-08-01), Chida
patent: 2003/0031222 (2003-02-01), Balsamo et al.
patent: 2003/0128729 (2003-07-01), Matsumura
patent: 8-340147 (1996-12-01), None
patent: 9-307181 (1997-11-01), None
patent: 2001-196694 (2001-07-01), None
patent: 2000-357842 (2002-12-01), None
patent: 2000-066046 (2003-03-01), None
patent: 2003-101139 (2003-04-01), None
patent: 2004235396 (2004-08-01), None
Notification of reasons for refusal; JP application No. 2004-111438.
“Semiconductor Laser”, Osmsha, 1stedition, pp. 238, 1994, Kenichi IGA; with partial translation.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Semiconductor laser device and optical pickup apparatus... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Semiconductor laser device and optical pickup apparatus..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Semiconductor laser device and optical pickup apparatus... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3884613

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.