Coherent light generators – Particular active media – Semiconductor
Patent
1990-08-09
1991-12-03
Epps, Georgia
Coherent light generators
Particular active media
Semiconductor
372 20, 372 50, 372 96, H01S 319
Patent
active
050705091
ABSTRACT:
Two novel structures of a high-quantum efficiency, wavelength-tunable, surface-emitting, low threshold laser diode which optimally utilizes certain advantages of a distributed feedback (DFB) structure. The preferred embodiments combine a separate confinement heterostructure (SCH), surface-emitting distributed feedback laser diode structure with a multiple quantum well (MQW) active layer and an index-guiding buried heterostructure. A wave-length tuning section is included in the device structure for wavelength adjustment, and an arrangement of transparent electrodes useable for ohmic contacts to the device provide anti-reflection coatings for the emitting portion of the device. A first preferred embodiment is termed the SELTH laser diode (surface emitting, low threshold). A second, related preferred embodiment combines the SELTH laser diode structure with additional optical elements to provide a collimated output beam and is termed the COSELTH laser diode (collimated, surface emitting, low threshold).
REFERENCES:
patent: 4006432 (1977-02-01), Streifer et al.
patent: 4495514 (1985-01-01), Lawrence et al.
patent: 4532632 (1985-07-01), Yamashita et al.
patent: 4675876 (1987-06-01), Svilans
patent: 4719636 (1988-01-01), Yamaguchi
patent: 4751710 (1988-06-01), Yamaguchi et al.
patent: 4802187 (1989-01-01), Bouley et al.
patent: 4847856 (1989-07-01), Sugimura et al.
patent: 4856017 (1989-08-01), Ungar
patent: 4894835 (1990-01-01), Uomi et al.
patent: 4920542 (1990-04-01), Brosson et al.
patent: 4958357 (1990-09-01), Kinoshita
"Micro Lasers Blaze Ahead", Electronic Engineering Timer, Sep. 24, 1990.
"Japanese Push SHG Laser R and D", Electronic Engineering Times, Aug. 20, 1990.
"General Approaches to Mask Design for Binary Optics" by James Logue and Marilynn L. Chisholm, SPIE vol. 1052, Holographic Optics: Optically and Computer Generated (1989).
Dudley Mark Z.
Eastman Kodak Company
Epps Georgia
LandOfFree
Surface emitting, low threshold (SELTH) laser diode does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Surface emitting, low threshold (SELTH) laser diode, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Surface emitting, low threshold (SELTH) laser diode will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1701150