Polarization-insensitive integrated wavelength converter

Details Polarization-insensitive integrated wavelength converter Polarization-insensitive integrated wavelength converter

2005-03-01

2005-03-01

Lee, John D. (Department: 2874)

Optical: systems and elements

Optical frequency converter

C359S332000, C385S011000, C385S014000

Reexamination Certificate

active

06862130

ABSTRACT:
A polarization-insensitive integrated wavelength converter system includes polarization-separating, polarization-rotating and wavelength-converter structures integrated into a monolithic optical structure. In one embodiment, a lithium niobate waveguide structure includes an integrated polarization separator which comprises two coupled Zinc-diffused and annealed-proton-exchanged waveguides, an electro-optic quarter-wave retarder, a mirror structure and a quasi-phasematching structure. In another embodiment, an electro-optic half-wave retarder and bent waveguide are used in place of the electro-optic quarter-wave retarder and mirror structure. In a further embodiment, an optical circulator is used in conjunction with the waveguide structure in order to discriminate between input and output optical signals.

REFERENCES:
patent: 5946129 (1999-08-01), Xu et al.
patent: 6252698 (2001-06-01), Oikawa
patent: 20010043390 (2001-11-01), Kim et al.
patent: 20020141040 (2002-10-01), Fujiura et al.
Yoo et al, “Multichannel Polarization-Independent Wavelength Conversion By Difference-Frequency Generation In AlGaAs Waveguides”, Conference On Optical Fiber Communication (OFC 97), Paper TuO6, Dallas TX, Feb. 1997, pp. 78-80.*
Watanabe et al, “Interband Wavelength Conversion of 320 Gb/s (32×10 Gb/s) WDM Signal Using A Polarization-Insensitive Fiber Four-Wave Mixer”, 24thEuropean Conference On Optical Communication (ECOC'98), Madrid SPAIN, Sept. 1998, pp 83-87.*
Brener et al, “Polarization-Insensitive Parametric Wavelength Converter Based On Cascaded Nonlinearities In LiNbO3 Waveguides”, 2000 Optical Fiber Communication Conference, Paper TuF1, Baltimore MD, Mar. 2000, pp. 66-68.

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