Optical: systems and elements – Polarization without modulation – By relatively adjustable superimposed or in series polarizers
Reexamination Certificate
2005-02-01
2005-02-01
Chang, Audrey (Department: 2872)
Optical: systems and elements
Polarization without modulation
By relatively adjustable superimposed or in series polarizers
C359S199200, C359S199200, C359S483010, C359S494010, C359S490020, C359S490020
Reexamination Certificate
active
06850364
ABSTRACT:
An optical device that can be used in a range of telecommunications applications including optical multiplexers/demultiplexers and optical routers. The optical device includes an optical processing loop which allows multi-stage performance characteristics to be achieved with a single physical filtration stage. Optical processing on the first leg and second legs of the loop is asymmetrical thereby improving the integrity of the optical signals by effecting complementary chromatic dispersion on the first and second legs. In an embodiment of the invention the optical device includes a fundamental filter cell, a retro reflector and a splitter/combiner. The fundamental filter cell filters optical signals propagating on each of two legs of an optical loop which intersects the fundamental filter cell. The fundamental filter cell operates as a full waveplate to the odd set of channels and a half waveplate to the even set of channels on a selected one of the two legs and as a half waveplate to the odd set of channels and a full waveplate to the even set of channels on a remaining one of the two legs. The retro reflector optically couples with the fundamental filter cell to reflect the optical signals from one of the two legs to an other of the two legs to form the optical loop. The splitter/combiner optically couples between the fundamental filter cell and the retro reflector to split or combine the odd set of channels and the even set of channels depending on the propagation direction of the optical signals along the optical loop.
REFERENCES:
patent: 4094581 (1978-06-01), Baldwin et al.
patent: 4685773 (1987-08-01), Carlsen et al.
patent: 4813761 (1989-03-01), Davis et al.
patent: 4987567 (1991-01-01), Buhrer
patent: 5596661 (1997-01-01), Henry et al.
patent: 5606439 (1997-02-01), Wu
patent: 5694205 (1997-12-01), Gualtieri et al.
patent: 5694233 (1997-12-01), Wu et al.
patent: 5867291 (1999-02-01), Wu et al.
patent: 6005697 (1999-12-01), Wu et al.
patent: 6040932 (2000-03-01), Duck et al.
patent: 6208444 (2001-03-01), Wong et al.
patent: 6373604 (2002-04-01), Xie
Bettman R. Brad
Mao Yalan
Rong Haisheng
Wang Wei
Wu Simon Yuanxiang
Chang Audrey
Curtis Craig
LandOfFree
Method and apparatus for an optical multiplexer and... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for an optical multiplexer and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for an optical multiplexer and... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3505175