Optical: systems and elements – Lens
Reexamination Certificate
2001-08-24
2002-11-26
Epps, Georgia (Department: 2873)
Optical: systems and elements
Lens
C359S641000
Reexamination Certificate
active
06487022
ABSTRACT:
TECHNICAL FIELD
This disclosure relates generally to optical signals, and in particular but not exclusively, relates to optical signals for free space optical communication systems.
BACKGROUND
Current laser transmitters in free space laser communication systems are limited to point-to-point broadcast systems. These point-to-point broadcast systems have pointing, tracking, and alignment issues.
Different developmental efforts aimed at increasing the performance of laser transmitters have emerged. The drawback with the various transmitters developed is that they are employed only in point-to-point broadcast.
Some researchers have used several discrete lasers and fiber links to connect multiple customers. Others have utilized tunable lasers that cannot operate simultaneously at different wavelengths. The problem with these schemes is that the system becomes bulky, expensive, and difficult to maintain. Besides, the basic challenges of point-to-point broadcast remain unsolved.
One of these challenges is the non-uniform intensity of the beam with its Gaussian distribution. The problem with the non-uniform intensity of the Gaussian beam is that it can cause signal loss to receivers not placed within the peak area of the beam. Stated in another way, receivers that receive the portion of the optical signals having the lower intensity along the fringes of the Gaussian distribution are more likely to experience signal loss or errors, as compared to receivers that receive the portion of the optical signal near the center or highest intensity of the Gaussian distribution.
SUMMARY
One aspect of the invention includes creating a uniform intensity flat-top beam from a non-uniform intensity optical beam, and canceling a divergence and correcting a phase of the uniform intensity flat-top beam that is created.
REFERENCES:
patent: 4530564 (1985-07-01), Scifres et al.
patent: 5237451 (1993-08-01), Saxe
patent: 5386426 (1995-01-01), Stephens
patent: 5701373 (1997-12-01), Oleskevich
patent: 6088170 (2000-07-01), Lee et al.
patent: 6128134 (2000-10-01), Feldman et al.
patent: 6339504 (2002-01-01), Oliva
Blakely , Sokoloff, Taylor & Zafman LLP
Epps Georgia
Hasan M.
Terabeam Corporation
LandOfFree
Transmitter using uniform intensity transmission for a... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Transmitter using uniform intensity transmission for a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transmitter using uniform intensity transmission for a... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2927849