Free space optical isolator with stacked parallel polarizers

Optical waveguides – Polarization without modulation

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C359S246000, C359S245000, C359S238000

Reexamination Certificate

active

07376291

ABSTRACT:
The present invention provides low cost methods and apparatuses for filtering out polarized light reflections in a free space optical isolator. Multiple polarizers having relatively poor extinction ratios can be stacked together as polarizer assemblies having higher extinction ratios than possible with the individual components. One or more polarizer assemblies may then be used in series with an optical signal generator, an optical signal rotator, one or more other polarizers or polarizer assemblies, and a fiber optic receptacle to isolate an optical signal in a transmitter optical subassembly. Accordingly, the present invention can polarize an optical signal more efficiently than with prior methods, doing so at a relatively high perpendicular beam extinction ratio with a much lower cost.

REFERENCES:
patent: 4770505 (1988-09-01), Okazaki
patent: 5128956 (1992-07-01), Aoki et al.
patent: 5375009 (1994-12-01), Otani et al.
patent: 5517356 (1996-05-01), Araujo et al.
patent: 5774264 (1998-06-01), Konno et al.
patent: 5818981 (1998-10-01), Pan et al.
patent: 5999315 (1999-12-01), Fukano et al.
patent: 6175668 (2001-01-01), Borrelli et al.
patent: 6275336 (2001-08-01), Yoshikawa et al.
patent: 6331991 (2001-12-01), Mahgerefteh
patent: 6375870 (2002-04-01), Visovsky et al.
patent: 6388730 (2002-05-01), Lindquist
patent: 6483645 (2002-11-01), Tanno et al.
patent: 6535655 (2003-03-01), Hasui et al.
patent: 6535656 (2003-03-01), Noge et al.
patent: 6577779 (2003-06-01), Watanabe
patent: 6590695 (2003-07-01), Kurtz et al.
patent: 6606885 (2003-08-01), Harris et al.
patent: 6654168 (2003-11-01), Borrelli et al.
patent: 6766082 (2004-07-01), Hirabayashi et al.
patent: 6813077 (2004-11-01), Borrelli et al.
patent: 2002/0005987 (2002-01-01), Wills et al.
patent: 2002/0048061 (2002-04-01), Glingener et al.
patent: 2002/0191880 (2002-12-01), Borrelli et al.
patent: 2003/0012517 (2003-01-01), Yu et al.
patent: 2003/0174397 (2003-09-01), Sugawara et al.
patent: 2004/0032663 (2004-02-01), TeKolste
Infrared Polarizers—Theory and Applications, Pike Technologies.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Free space optical isolator with stacked parallel polarizers does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Free space optical isolator with stacked parallel polarizers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Free space optical isolator with stacked parallel polarizers will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2779631

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.