Integrated variable optical attenuator

Details Integrated variable optical attenuator Integrated variable optical attenuator

2007-06-26

2007-06-26

Pert, Evan (Department: 2826)

Active solid-state devices (e.g., transistors, solid-state diode

Responsive to non-electrical signal

Electromagnetic or particle radiation

C257S432000, C257S460000, C257S461000, C438S048000, C438S065000

Reexamination Certificate

active

10762913

ABSTRACT:
A variable optical attenuator. A PIN structure is integrated with an optical detector such as a PIN diode or an APD diode. When the PIN structure is forward biased, the light signal is not affected and is detected by the optical detector. When the PIN structure is reverse biased, the light signal is attenuated and the dynamic range of the optical detector can be increased.

REFERENCES:
patent: 5475256 (1995-12-01), Sawada et al.
patent: 5973339 (1999-10-01), Yokouchi et al.
patent: 6577654 (2003-06-01), Dijaili et al.
patent: 6813431 (2004-11-01), Davids et al.
patent: 2003/0161571 (2003-08-01), Davids et al.
patent: WO97/08757 (1997-06-01), None

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