Laser diode, optical pickup device, optical disk apparatus,...

Details Laser diode, optical pickup device, optical disk apparatus,... Laser diode, optical pickup device, optical disk apparatus,...

2005-04-12

2005-04-12

Harvey, Min Sun (Department: 2828)

Coherent light generators

Particular active media

Semiconductor

C372S043010, C372S044010, C372S046012, C372S049010, C372S049010, C372S049010, C372S050121

Reexamination Certificate

active

06879613

ABSTRACT:
A laser diode capable of reducing a radiating angle θ⊥ in the vertical direction, an optical pickup device, an optical disk apparatus, and optical communications equipment, all equipped with the laser diode which increases optical coupling efficiency. It has a first cladding layer of the first conductive type formed on a substrate, with an active layer on top of the first cladding layer and a second cladding layer of the second conductive type on top of the active layer. In at least the first or second cladding layer, it is formed of at least one optical guide layer having a higher refractive index than the first or second cladding layer and operating to expand a beam waist in the waveguide. This operation contributes to widening a region in which to shut up light, enabling a radiating angle θ⊥ in the vertical direction to be reduced.

REFERENCES:
patent: 5559819 (1996-09-01), Abe et al.
patent: 5937120 (1999-08-01), Higashi
patent: 6118799 (2000-09-01), Okubo et al.
patent: 6195375 (2001-02-01), Hirata
patent: 6333945 (2001-12-01), Abe et al.
patent: 6606334 (2003-08-01), Shigihara et al.
patent: 4290280 (1992-10-01), None
patent: 5251813 (1993-09-01), None
patent: 5275798 (1993-10-01), None
patent: 7240560 (1995-09-01), None
patent: 1330540 (1999-11-01), None
patent: 2003023214 (2003-01-01), None

Affiliated with

Also associated with

Rating

Laser diode, optical pickup device, optical disk 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 Laser diode, optical pickup device, optical disk apparatus,..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Laser diode, optical pickup device, optical disk apparatus,... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3434196