Acquisition, pointing, and tracking architecture for laser...

Details Acquisition, pointing, and tracking architecture for laser... Acquisition, pointing, and tracking architecture for laser...

2005-08-02

2009-10-27

Singh, Dalzid (Department: 2613)

Optical communications

Optical communication over freee space

C398S119000, C398S122000, C398S123000

Reexamination Certificate

active

07609972

ABSTRACT:
A technique for acquiring and tracking terminals in a free-space laser communication system involves exchanging beacon laser beams between the terminals to acquire and then track the terminals such that data laser beams exchanged by the terminals for communication are steered based on feedback from detection of the beacon laser beams. The beacon laser beams used for acquisition have a greater beam divergence than those used for tracking. Gimbals provide coarse steering of the data laser beams, and steering mirrors provide fine steering. GPS position data exchanged via an RF link can be used for initial pointing of the beacon laser beams for acquisition. The beacon laser beams can be chopped such that all terminals can use the same beacon wavelength and are distinguished by using different chopping frequencies. By detecting a chopped signal, the position sensor detector can be AC coupled to reduce sensitivity to solar radiation and glint.

REFERENCES:
patent: 6347001 (2002-02-01), Arnold et al.
patent: 6816112 (2004-11-01), Chethik
patent: 7110678 (2006-09-01), Willebrand et al.
patent: 7295556 (2007-11-01), Roese et al.
patent: 7424225 (2008-09-01), Elliott
patent: 2002/0097468 (2002-07-01), Mecherle et al.
patent: 2002/0131121 (2002-09-01), Jeganathan et al.
patent: 2005/0069325 (2005-03-01), Cicchiello et al.
patent: 02095989 (2002-11-01), None
PCT International Search Report and Written Opinion in counterpart International Application No. PCT/US2006/029915, dated Apr. 29, 2008.

Affiliated with

Also associated with

Rating

Acquisition, pointing, and tracking architecture for laser... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Acquisition, pointing, and tracking architecture for laser..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Acquisition, pointing, and tracking architecture for laser... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4100332