Active solid-state devices (e.g. – transistors – solid-state diode – Incoherent light emitter structure – In combination with or also constituting light responsive...
Reexamination Certificate
2005-11-01
2005-11-01
Ngô, Ngân V. (Department: 2818)
Active solid-state devices (e.g., transistors, solid-state diode
Incoherent light emitter structure
In combination with or also constituting light responsive...
C257S081000, C372S043010, C372S050121
Reexamination Certificate
active
06960791
ABSTRACT:
The optical semiconductor apparatus includes, on an n-GaAs substrate, a surface-emitting semiconductor laser device and a photodiode integrated on the periphery of the laser device with an isolation region interposed there between. The laser device is composed of an n-DBR mirror, an active region, and a p-DBR mirror and includes a columnar layered structure with its sidewall covered with an insulating film. The photodiode is formed on the substrate and has a circular layered structure wherein an i-GaAs layer and a p-GaAs layer surrounds the laser device with an isolating region interposed between the i-GaAs and p-GaAs layers and the laser device. The diameter of the photodiode is smaller than the diameter of the optical fiber core optically coupled with the optical semiconductor apparatus. Since the laser device and the photodiode are monolithically integrated, the devices do not require optical alignment, and thus, facilitate optical coupling with an optical fiber.
REFERENCES:
patent: 5900619 (1999-05-01), Honda et al.
patent: 6753214 (2004-06-01), Brinkmann et al.
patent: 2002/0003824 (2002-01-01), Lo et al.
patent: 2005/0025207 (2005-02-01), Thornton et al.
Hino Tomonori
Mitomo Jugo
Narui Hironobu
Okano Nobukata
Ngo Ngan V.
Sonnenschein Nath & Rosenthal LLP
Sony Corporation
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