Adiabatic polarization splitter

Details Adiabatic polarization splitter Adiabatic polarization splitter

1991-06-28

1992-07-21

Lee, John D.

Optical waveguides

Polarization without modulation

385 27, 385 43, 385 45, 359485, G02B 530

Patent

active

051330296

ABSTRACT:
A 2.times.2 polarization beam splitter comprising two parallel waveguides and two crossing waveguides coupled in an X-configuration to the parallel waveguides by four adiabatic .gamma.-junctions which transfer only one of the two orthogonal polarization modes across the junctions, e.g., the TE mode. The crossing waveguides may be of different widths and cross at a very shallow angle so that little cross-talk occurs at the crossing.

REFERENCES:
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patent: 4998793 (1991-03-01), Henry et al.
patent: 5002349 (1991-03-01), Cheung et al.
patent: 5048909 (1991-09-01), Henry et al.
D. A. Smith et al., "Polarization-Independent Acoustically Tunable Optical Filter," Applied Physics Letters, Jan. 1990, vol. 56, pp. 209-211.
N. Goto et al., "A TE-TM Mode Splitter in LiNb0.sub.3 by Proton Exchange and Ti Diffusion," Journal of Lightwave Technology, Oct. 1989, vol. 7, pp. 1567-1574.
Y. Shani et al., "Integrated Optic Adiabatic Polarization Splitter on Silicon," Applied Physics Letters, Jan. 1990, vol. 56, pp. 120-121.
M. Izutsu et al., "Optical-Waveguide Hybrid Coupler," Optics Letters, Nov. 1982, vol. 7, pp. 549-551.
A. Neyer, "Low-Crosstalk Passive Polarization Splitters Using Ti:LiNbO.sub.3 Waveguide Crossings," Sep. 1989, Applied Physics Letters, vol. 55, pp. 927-929.
W. K. Burns et al., "Mode Conversion in Planar-Dielectric Separating Waveguides," IEEE Journal of Quantum Electronics, Jan. 1975, vol. QE-11, pp. 32-39.

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