Attenuator for high-power unpolarized laser beams

Details Attenuator for high-power unpolarized laser beams Attenuator for high-power unpolarized laser beams

2007-08-21

2007-08-21

Allen, Stephone B. (Department: 2872)

Optical: systems and elements

Polarization without modulation

By relatively adjustable superimposed or in series polarizers

C359S490020, C359S490020, C359S638000

Reexamination Certificate

active

11214553

ABSTRACT:
A method for attenuating an unpolarized laser beam includes separating the laser beam into two plane-polarized beams. The plane-polarized beams are polarization rotated. Each of the polarization-rotated beams is separated into two plane-polarized portions. One of the portions of one polarization-rotated beam is combined with one of the portions of the other polarization-rotated beam to provide an attenuated output-beam.

REFERENCES:
patent: 5740288 (1998-04-01), Pan
patent: 5877876 (1999-03-01), Birdwell
patent: 6059555 (2000-05-01), Barenboim et al.
patent: 6330097 (2001-12-01), Chen et al.
patent: 6850544 (2005-02-01), Friesem et al.
patent: 2004/0201880 (2004-10-01), Lee
patent: 2005/0143720 (2005-06-01), Yamada et al.
patent: 02234114 (1990-09-01), None

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