Coherent light generators – Particular pumping means – Pumping with optical or radiant energy
Reexamination Certificate
2005-02-22
2005-02-22
Harvey, Minsun Oh (Department: 2828)
Coherent light generators
Particular pumping means
Pumping with optical or radiant energy
C372S045013, C372S046012, C372S075000
Reexamination Certificate
active
06859481
ABSTRACT:
An optically-pumped (OP) multiple quantum well (MQW) active region is disposed in an optical cavity of an OP VCSEL, which generates laser light at a lasing wavelength. The OP VCSEL receives pump light at a first end of the optical cavity. A plurality of quantum well (QW) groups are equally spaced within the active region to correspond in position with antinodes of a standing wave of the lasing wavelength in the optical cavity. The QW groups include a first QW group that is closest to the first end of the optical cavity, and a last QW group that is farthest from the first end of the optical cavity. A plurality of equally thick intermediate absorbing layers are disposed between adjacent QW groups. A last absorbing layer is disposed adjacent to the side of the last QW group farthest away from the first end of the optical cavity. A first absorbing layer is disposed adjacent to the side of the first QW group closest to the first end of the optical cavity. The first absorbing layer has a thickness at least two times smaller than that of the intermediate absorbing layers, thereby leading to improved pump power distribution uniformity across QW groups of the active region.
REFERENCES:
patent: 5068867 (1991-11-01), Hasenberg et al.
patent: 5225692 (1993-07-01), Takeuchi et al.
patent: 5416790 (1995-05-01), Yodoshi et al.
patent: 5600667 (1997-02-01), Kidoguchi et al.
patent: 5610096 (1997-03-01), Yodoshi et al.
patent: 5796771 (1998-08-01), DenBaars et al.
patent: 5812578 (1998-09-01), Schemmann et al.
patent: 6026110 (2000-02-01), Makino
patent: 6055253 (2000-04-01), Kidoguchi et al.
patent: 6141364 (2000-10-01), Adachi et al.
patent: 6285702 (2001-09-01), Caprara et al.
patent: 6327293 (2001-12-01), Salokatve et al.
patent: 6438149 (2002-08-01), Tayebati et al.
patent: 6503768 (2003-01-01), Cho et al.
patent: 6546029 (2003-04-01), Sirbu et al.
patent: 6567434 (2003-05-01), Spinelli et al.
patent: 6625182 (2003-09-01), Kuksenkov et al.
patent: 6628695 (2003-09-01), Aldaz et al.
patent: 6693941 (2004-02-01), Okazaki et al.
patent: 6735234 (2004-05-01), Paschotta et al.
Applied Optoelectronics, Inc.
Harvey Minsun Oh
Kinsella N. Stephan
Menefee James
LandOfFree
Optically-pumped multiple-quantum well active region with... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optically-pumped multiple-quantum well active region with..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optically-pumped multiple-quantum well active region with... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3489564