Self-adjustable tunable filter

Details Self-adjustable tunable filter Self-adjustable tunable filter

2006-11-14

2006-11-14

Phan, Hanh (Department: 2613)

Optical communications

Multiplex

Wavelength division or frequency division

C398S079000, C398S082000, C398S083000, C398S084000, C398S087000, C398S182000, C398S183000, C398S192000, C398S193000, C398S194000, C398S195000, C398S196000, C398S197000, C398S198000, C385S024000, C385S037000, C385S040000, C385S003000, C385S012000

Reexamination Certificate

active

07136590

ABSTRACT:
A system for matching a optical filter characteristic of a first filter tunable in wavelength with an optical first signal comprises a modulator for modulating at least a part of the first signal with a modulation signal before being applied to the first filter. An analyzing unit derives a control signal for tuning the first filter by analyzing the modulated first signal after passing the first filter in conjunction with the modulation signal.

REFERENCES:
patent: 5285059 (1994-02-01), Nakata et al.
patent: 5552919 (1996-09-01), Majima et al.
patent: 5828689 (1998-10-01), Epworth
patent: 6674936 (2004-01-01), Jacobowitz et al.
patent: 0930741 (1999-07-01), None
patent: WO 01/35138 (2001-05-01), None
“Automatic Laser Tracking Filter—ALTF”, Micron Optics, Inc., 2001 Test Instruments Brochure, attached to the 2002 updated version.

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