Fabrication process of lithium niobate TE/TM polarization splitt

Details Fabrication process of lithium niobate TE/TM polarization splitt Fabrication process of lithium niobate TE/TM polarization splitt

1996-12-31

2000-10-31

Bell, Janyce

Coating processes

Optical element produced

Polarizer, windshield, optical fiber, projection screen, or...

427379, 4273833, 427394, 427261, 427269, 427404, B05D 506

Patent

active

061399108

ABSTRACT:
This is a fabrication process for Y-branch nickel/zinc-indiffused polarization splitters on lithium niobate. The fabrication technology needs only two nickel/zinc indiffusions; one at a high temperature and the other at a lower temperature. Nickel/zinc-indiffused waveguides can support single-ordinary, single-extraordinary, and random polarization waves depending on the fabrication process parameters. High extinction ratios can be achieved due to the inherent single-polarization of the waveguides. The splitting ratios of the TE and TM modes are sufficiently high for practical applications.

REFERENCES:
patent: 4100313 (1978-07-01), Hammer
Wei, et al. "ATE-TM Mode Splitter on Lithium Niobate Using Ti, Ni, and MgO Diffusions." IEEE Photonics Technology Letters, Feb., 1994, vol. 6, No. 2, p. 245.
P.K. Wei and W.S. Wang. "Novel TE-TM Mode Splitter on Lithium Niobate Using Nickel Indiffusion and Proton Exchange Techniques." Electronics Letters, Jan. 6, 1994, vol. 30, No. 1, p. 35.
Liao, et al. "Nickel-Diffused Lithium Niobate Optical Waveguide with Process-Dependent Polarization." IEEE Photonics Technology Letters. Apr. 1996, vol. 8, No. 4, p548.
Liao, et al, "Passive NiLiNbO.sub.3 Polarisation Splitter at 1.3 .mu.m Wavelength." Electronics Letters. May 23, 1996. vol. 32, No. 11, pp1003-1004.

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