Optical: systems and elements – Single channel simultaneously to or from plural channels – By partial reflection at beam splitting or combining surface
Patent
1999-06-04
2000-12-12
Epps, Georgia
Optical: systems and elements
Single channel simultaneously to or from plural channels
By partial reflection at beam splitting or combining surface
359487, 359494, 359495, 359496, 359497, G02B 2714, G02B 2728
Patent
active
061606650
ABSTRACT:
A system, method and apparatus for performing optical beamsplitting are disclosed. In a preferred embodiment, a high extinction ratio polarization beamsplitter comprises at least two polarized beamsplitting surfaces that are aligned parallel to each other. The beamsplitter receives a first input light beam that is incident on a first polarized beamsplitting surface. The beamsplitter receives a second input light beam that is also incident on the first polarized beamsplitting surface. In a preferred embodiment, the first and second input light beams have a cross point that is not incident on such first polarized beamsplitting surface. Further, in a preferred embodiment, each of the first and second input light beams are incident on such first polarized beamsplitting surface at a point that is not its center point. Cross talk noise is reduced in a preferred embodiment by directing resulting noise to a point that is not co-linear with an output signal. Further, cross talk noise is reduced in a preferred embodiment by directing noise such that the noise incurs a polarized beamsplitting surface multiple times, each reducing the noise level.
REFERENCES:
patent: 4504123 (1985-03-01), Smith
patent: 5245472 (1993-09-01), Hegg
patent: 5596661 (1997-01-01), Henry et al.
patent: 5680490 (1997-10-01), Cohen et al.
patent: 5694233 (1997-12-01), Wu et al.
patent: 5777788 (1998-07-01), Noguchi
patent: 5809190 (1998-09-01), Chen
patent: 5867291 (1999-02-01), Wu et al.
patent: 5900976 (1999-05-01), Handschy et al.
patent: 5943167 (1999-08-01), Kelly
patent: 5959773 (1999-09-01), Gagnon
Analysis of a Tunable Multichannel Two-Mode-Interference Wavelength Division Multiplexer/Demultiplexer--Youngchul Chung, Jong Chang Yi, Sun Ho Kim, and Sang Sam Choi; Jornal of Lightwave Technology, vol. 7, No. 5, May 1998.
Optical FDM Transmission Technique--Kiyoshi Nosu, Hiromu Toba, and Katsushi Iwashita; Jornal of lightwave Technology, vol. LT-5, No. 9, Sep. 1987.
A Four-Channel Optical Waveguide Multi/Demultiplexer for 5-Ghz Spaced Optical FDM Transmission--Kyo Inoue, Norio Takato, Hiromu Toba, and Masao Kawachi; Journal of Lightwave Technology, vol. 6, No. 2, Feb. 1988.
Chorum Technologies Inc.
Epps Georgia
Spector David N.
LandOfFree
High extinction ratio polarization beamsplitter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with High extinction ratio polarization beamsplitter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High extinction ratio polarization beamsplitter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-223126