Gain flattening filter and gain flattened optical fiber...

Optical waveguides – With disengagable mechanical connector – Structure surrounding optical fiber-to-fiber connection

Reexamination Certificate

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Reexamination Certificate

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07104700

ABSTRACT:
A gain flattening filter is provided to reduce volume and manufacturing cost of a gain flattened optical fiber amplifier, even when a required peak loss exceeds the limit of each dielectric thin film filter. The inventive gain flattening filter includes: a housing having a first opening and a second opening; a first ferrule disposed at one end of the housing, the first ferrule having an opening through which an input of an optical fiber is packaged; a second ferrule disposed at the other end of the housing, the second ferrule having an opening through which an output of the optical fiber is packaged; and, a plurality of thin film filters disposed in sequence between the first and second ferrules for flattening gain of optical signals passing therethrough.

REFERENCES:
patent: 6198858 (2001-03-01), Pan et al.
patent: 6611378 (2003-08-01), Wang et al.
patent: 6865315 (2005-03-01), Hulse
patent: 6870991 (2005-03-01), Ohta et al.
patent: 2002/0154387 (2002-10-01), Mori et al.
patent: 2005/0248832 (2005-11-01), Sommer et al.
patent: 2001-013362 (2001-01-01), None
patent: 2001-201657 (2001-07-01), None
patent: 2001-296446 (2001-10-01), None
patent: 2001296446 (2001-10-01), None
patent: 2002-182061 (2002-06-01), None
patent: 2002-182062 (2002-06-01), None
patent: 2003-084168 (2003-03-01), None
patent: WO 00/45479 (2000-08-01), None

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