Coherent light generators – Particular resonant cavity – Distributed feedback
Patent
1999-01-25
2000-12-12
Davie, James W.
Coherent light generators
Particular resonant cavity
Distributed feedback
372 49, 372 20, 372 99, H01S 3085
Patent
active
061608343
ABSTRACT:
A vertical cavity surface emitting laser (VCSEL) with variable tuning layer for adjusting the slope of the laser and method for manufacturing the same are disclosed. In practice, a VCSEL wafer is grown by any conventional technique, and fabricated into discrete lasers while maintained in wafer form. The initial lasers are then tested to determine characteristics, such as the slope efficiency distribution. A variable thickness dielectric layer is then deposited which is calculated to tune the slope efficiency distribution to within a target specification by altering the phase of the top facet reflectivity of the initial lasers. The resulting change in transmission directly changes the laser slope in a predictable fashion. The tuning step may be repeated, if necessary, to further refine the slope to the desired value. The method produces VCSELs with similar or consistent slopes from a plurality of wafers. Also disclosed are an optical subassembly and optical transceiver incorporating the improved VCSELs.
REFERENCES:
patent: 5343487 (1994-08-01), Scott et al.
patent: 5397739 (1995-03-01), Chalmers et al.
patent: 5483511 (1996-01-01), Jewell et al.
patent: 5521736 (1996-05-01), Swirhun
patent: 5577064 (1996-11-01), Swirhun et al.
patent: 5594751 (1997-01-01), Scott
patent: 5606572 (1997-02-01), Swirhun et al.
patent: 5642376 (1997-06-01), Olbright et al.
patent: 5757837 (1998-05-01), Lim et al.
patent: 5812582 (1998-09-01), Gilliland et al.
patent: 5976903 (1999-11-01), Lee et al.
Jeffrey W. Scott, Design, Fabrication and Characterization of High-Speed Intra-Cavity Contacted Vertical-Cavity Lasers, Jun. 1995. ECE Technical Report #95-06, Department of Electrical Computer Enginnering, University of California Santa Barbara.
Jeffrey W. Scott, "Vertical-cavity Lasers Facilitate Gigabit Communications," Laser Focus World, Oct. 1998, 3 pages.
Cielo Communications, Inc.
Davie James W.
LandOfFree
Vertical cavity surface emitting lasers with consistent slope ef does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Vertical cavity surface emitting lasers with consistent slope ef, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Vertical cavity surface emitting lasers with consistent slope ef will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-224339