Integrated optical polarisation splitter

Details Integrated optical polarisation splitter Integrated optical polarisation splitter

1996-03-22

1997-12-09

Lee, John D.

Optical waveguides

Polarization without modulation

385 14, 385 28, G02B 6126

Patent

active

056968566

ABSTRACT:
An integrated optical polarisation splitter comprises a first waveguiding section (A) with a first guide (21), a second waveguiding section (C) with a second and a third optically decoupled and physically separated guides (24, and 25 or 28) and an intermediary section (B) for a coupling between the first and the second section. The intermediary section (B) comprises a first monomodal waveguide (22) and a second bimodal waveguide (23), which are optically coupled over a length L. The bimodal waveguide (23) has a propagation constant for the first-order guided mode of one polarisation (TE or TM), which is equal to the propagation constant for the zero-order guided mode of said polarisation (TE or TM) of the monomodal waveguide (22). The two coupled waveguides have different propagation constants for the remaining guided modes.

REFERENCES:
patent: 4669815 (1987-06-01), Thaniyavern
patent: 4911513 (1990-03-01), Valette
patent: 5257330 (1993-10-01), van der Tol
patent: 5375178 (1994-12-01), van der Tol
patent: 5418867 (1995-05-01), van der Tol
patent: 5475771 (1995-12-01), Hosoi
P. Albrecht et al; "TE/TM Mode Splitters on InGaAsP/InP"; Feb. 2, 1990; pp. 114-115; IEEE Photonics Technology Letters, vol. 2, No. 2.
J.J.G.M. Van Der Tol et al; "A Polarization Splitter on LiNbO3 Using Only Titanium Diffusion"; Jul. 7, 1991; pp. 879-886; Journal of Lightwave Technology, vol. 9, No. 7.

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