Optical waveguides – Having nonlinear property
Patent
1996-08-27
1998-05-26
Bovernick, Rodney B.
Optical waveguides
Having nonlinear property
385125, G02B 602
Patent
active
057580014
ABSTRACT:
A system (10) for conjugating electromagnetic energy beams adapted for use with UV, visible and infrared beams (24), and beams (24) that are depolarized or partially polarized. The inventive system (10) includes an SBS-active medium (20) and an asymmetric waveguide (27) whose guiding medium is an SBS-active medium (20). The asymmetric waveguide (27) has different propagation constants for different modes in the beam and this difference is sufficient for dispersing the modes over the length of SBS gain, thus eliminating cross-scattering between the different modes. The asymmetric waveguide (27) allows all the modes to interfere with each other locally, creating local hot spots that favor correct phases between the polarizations of a back-scattered beam (30). The inventive system (10) has focusing optics (12) for focusing the beams (24) into the SBS-active medium (20) inside the asymmetric waveguide (27) at an angle (22) with respect to an axis (18) of the waveguide (27). The focusing optics (12) focus the beams (24) and adjust the launching angle of the beams (26) to achieve the optimum conditions for discriminating the modes.
REFERENCES:
patent: 4791644 (1988-12-01), Dube
patent: 4881790 (1989-11-01), Mollenauer
patent: 5383207 (1995-01-01), Culverhouse et al.
patent: 5604618 (1997-02-01), Mori et al.
Alkov Leonard A.
Bovernick Rodney B.
Hughes Electronics
Kang Ellen E.
Lenzen, Jr. Glenn H.
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