Optical: systems and elements – Optical amplifier – Raman or brillouin process
Reexamination Certificate
2005-05-10
2005-05-10
Tarcza, Thomas H. (Department: 3663)
Optical: systems and elements
Optical amplifier
Raman or brillouin process
Reexamination Certificate
active
06891659
ABSTRACT:
An object of the present invention is to prevent an interruption circuit of an optical amplifier from malfunctioning due to Raman pump wave. A typical mode of the present invention is characterized in that an pump wave elimination filter is inserted before an input-light detector and a reflected-light detector which constitute the optical amplifier. This permits only a signal component to be detected, enabling interruption operation, while eliminating a remaining component of Raman pump wave transmitted from for example a downstream of an optical fiber transmission line. In addition, a judgment threshold value for the interruption operation is changed according to ON/OFF condition of the pump wave. Or the Raman pump wave itself is used for detecting output's open.
REFERENCES:
patent: 4449043 (1984-05-01), Husbands
patent: 4570081 (1986-02-01), Baldwin
patent: 4805977 (1989-02-01), Tamura et al.
patent: 4900917 (1990-02-01), Dixon et al.
patent: 5185814 (1993-02-01), Healey
patent: 5241414 (1993-08-01), Giles et al.
patent: 5280549 (1994-01-01), Barnard et al.
patent: 5298965 (1994-03-01), Spirit et al.
patent: 5319482 (1994-06-01), Tsuchiya et al.
patent: 5343286 (1994-08-01), Keeble et al.
patent: 5504617 (1996-04-01), Spirit
patent: 5506724 (1996-04-01), Shimizu et al.
patent: 5600481 (1997-02-01), Nakabayashi
patent: 5633741 (1997-05-01), Giles
patent: 5633749 (1997-05-01), Shibuya
patent: 5680246 (1997-10-01), Takahashi et al.
patent: 5729372 (1998-03-01), Terahara et al.
patent: 5784192 (1998-07-01), Sugiyama et al.
patent: 5808785 (1998-09-01), Nakabayashi
patent: 5859725 (1999-01-01), Sugiya et al.
patent: 5864423 (1999-01-01), Kosaka
patent: H001791 (1999-03-01), Williams
patent: 5883735 (1999-03-01), Sugiyama et al.
patent: 5887093 (1999-03-01), Hansen et al.
patent: 5914795 (1999-06-01), Jourdan et al.
patent: 5963362 (1999-10-01), Fukaishi
patent: 5999548 (1999-12-01), Mori et al.
patent: 6049413 (2000-04-01), Taylor et al.
patent: 6052393 (2000-04-01), Islam
patent: 6055092 (2000-04-01), Sugaya et al.
patent: 6055094 (2000-04-01), Shima et al.
patent: 6067187 (2000-05-01), Onaka et al.
patent: 6072614 (2000-06-01), Roberts
patent: 6088152 (2000-07-01), Berger et al.
patent: 6160942 (2000-12-01), Watanabe
patent: 6262288 (2001-07-01), Fehr et al.
patent: 6263396 (2001-07-01), Cottle et al.
patent: 6295147 (2001-09-01), Yamane et al.
patent: 6304368 (2001-10-01), Hansen et al.
patent: 6317255 (2001-11-01), Fatehi et al.
patent: 6337764 (2002-01-01), Yoon et al.
patent: 6359725 (2002-03-01), Islam
patent: 6373621 (2002-04-01), Large et al.
patent: 6407854 (2002-06-01), Shum
patent: 6469824 (2002-10-01), Sasaki
patent: 6547453 (2003-04-01), Stummer et al.
patent: 07-190887 (1995-07-01), None
patent: 07-240717 (1995-09-01), None
Antonelli Terry Stout & Kraus LLP
Hitachi , Ltd.
Hughes Deandra M.
Tarcza Thomas H.
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