Optical communications – Optical communication over freee space – Satellite system
Reexamination Certificate
2005-01-04
2005-01-04
Negash, Kinfe-Michael (Department: 2633)
Optical communications
Optical communication over freee space
Satellite system
C398S124000, C356S141200
Reexamination Certificate
active
06839519
ABSTRACT:
A laser crosslink apparatus includes an optical device (212, FIG.5), a beam splitter (512), an acquisition channel and a tracking and communication channel. The acquisition channel includes a high density optical fiber bundle and an acquisition channel device (510). The optical device (212) receives laser light from a wide field of view, and the beam splitter (512) splits the light into the two channels. The high density optical fiber bundle (204) has one end (206) in a focal plane of the optical device, and another end (208) coupled to the acquisition channel device (510). The acquisition channel device (510) includes an optical receiver array (400, FIG.4). The location of spot footprints on the optical receiver array determines the direction from which the laser light is received within the wide field of view. The optical fiber bundle allows the optical receiver array to be located away from the optical device, near the receiving/tracking system, where it can be more easily shielded from the harmful effects of space.
REFERENCES:
patent: 4625108 (1986-11-01), Nestel et al.
patent: 4880305 (1989-11-01), Salt
patent: 5142400 (1992-08-01), Solinsky
patent: 5218467 (1993-06-01), Ross et al.
patent: 5923452 (1999-07-01), Carlson
patent: 20030016348 (2003-01-01), Sallee
An article entitled “Progress On The Development Of The Optical Communications Demonstrator”, by Tsun-Yee Yan, Muthu Jeganathan and James R. Lesh, California Institute of Technology from Free Space Laser Communication Technologies IX, 1997 SPIE vol. 2990.
An article entitled “Laser Crosslink Subsystem—An Overview”, by R.B. Deadrick and W.F. Deckelman, McDonnell Douglas Electronic Systems Company, from SPIE vol. 1635 Free-Space Laser Communication Technologies IV(1992)/225.
Hartman Davis Howard
Kleiner Norbert
Tomren Douglas Roy
Warble Keith Vaclav
Bogacz Frank J.
Motorola Inc.
Negash Kinfe-Michael
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