Coherent light generators – Particular resonant cavity – Distributed feedback
Patent
1995-06-08
1997-01-21
Bovernick, Rodney B.
Coherent light generators
Particular resonant cavity
Distributed feedback
372 34, H01S 308, H01S 304, H01S 318
Patent
active
055965954
ABSTRACT:
A surface-emitting laser includes optically transparent layers on a side of a DBR mirror structure that is opposite to an optical cavity of the laser. In one embodiment, the transparent layer is a heat-conducting layer that has an efficient heat transfer relationship with an opening in a top electrode and with a heat-spreading layer. The heat-spreading layer increases the diameter of the electrode, so as to reduce the thermal impedance of the surface-emitting laser. The heat-spreading layer may be annular in shape and may have an inside diameter that is less than the outside diameter of the electrode, allowing the heat-spreading layer to first overlap the electrode and then overlap the portion of the heat-conducting layer that resides on the inside portion of the electrode. In another embodiment, the optically transparent layer is positioned between the top electrode and the top DBR mirror structure of the surface-emitting laser. In this embodiment, the transparent layer is a current-spreading layer that reduces the lateral resistance of the laser. Lateral resistance is reduced by providing a layer having a thickness of one-half of the wavelength of the light energy generated in the laser times an odd multiple greater than one. Optionally, two half-wavelength layers may be formed between the electrode and the mirror structure, with the upper layer being selected primarily for its electrical properties and the lower layer being selected primarily for its optical properties.
REFERENCES:
patent: 5245622 (1993-09-01), Jewell et al.
patent: 5266503 (1993-11-01), Wang et al.
patent: 5293392 (1994-03-01), Shieh et al.
patent: 5317587 (1994-05-01), Ackley et al.
patent: 5343487 (1994-08-01), Scott et al.
patent: 5359618 (1994-10-01), Lebby et al.
patent: 5422901 (1995-06-01), Lebby et al.
patent: 5442203 (1995-08-01), Adomi et al.
Houng Yu-Min
Tan Michael R. T.
Wang Shih-Yuan
Bovernick Rodney B.
Hewlett--Packard Company
McNutt Robert
LandOfFree
Current and heat spreading transparent layers for surface-emitti does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Current and heat spreading transparent layers for surface-emitti, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Current and heat spreading transparent layers for surface-emitti will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2330241