Optical waveguides – Polarization without modulation
Patent
1994-08-30
1995-05-23
Lee, John D.
Optical waveguides
Polarization without modulation
385 28, 385 45, G02B 626
Patent
active
054188679
ABSTRACT:
An integrated optical, polarization-manipulating device, comprises a first waveguiding section (A) with a first guide (21), a second waveguiding section (E) with a second and a third optically decoupled and physically separated guide (28, 29) and an intermediary waveguiding section (C) for an adiabatic coupling between the first and the second sections (A, E). The intermediary section (C) comprises a polarization-sensitive asymmetric Y-branching device, provided with two mutually diverging intermediary guides (25, 27) coupled to the guides (28, 29) of the second section. At least one of the two intermediary guides (25) has a channel structure fragmented in the longitudinal direction. Coupling sections (B, D) for adiabatic couplings between guides of successive sections are provided, on the respective coupling sides, with the fragmented waveguide of a corresponding fragmented structure. The device can be provided on non-birefringent materials; is relatively simple to manufacture; and, in the case of the ridge-type guide structure, only one etching step is required.
REFERENCES:
patent: 4846540 (1989-07-01), Kapon
patent: 4998793 (1991-03-01), Henry et al.
patent: 5048909 (1991-09-01), Henry et al.
patent: 5056883 (1991-10-01), Diemeer et al.
patent: 5111517 (1992-05-01), Riviere
patent: 5133029 (1992-07-01), Baran et al.
patent: 5185828 (1993-02-01), van der Tol
patent: 5285507 (1994-02-01), Van Der Tol
J. J. G. M. Van Der Tol et al, "A Polarization Splitter on LiNbO.sub.3 Using Only Titanium Diffusion", Jul. 1991, pp. 879-886, Journal of Lightwave Technology, No. 7, vol. 9.
J. J. G. M. Van Der Tol et al, "Measurement of Mode Splitting in Asymmetric Y-Junctions", May 1992, pp. 454-457, IEEE Photonics Technology Letters, No. 5, vol. 4.
K. Matsubara et al, "Y-Branch TE-TM Mode Splitter Using Multilayered Waveguide", May 1992, pp. 1636-1640, Japanese Journal of Applied Physics, Part 1, No. 5b, vol. 31.
P. Albrecht et al; TE/TM Mode Splitters on InGaAsP/InP; Feb. 1990; pp. 114-115; 1990 IEEE, vol. 2, No. 2, Photonics Tech. Letters.
Birefringence Control and Dispersion Characteristics of Silicon Oxynitride Optical Waveguides; Dec. 1991; pp. 2317-2318; Electronics Letters, vol. 27, No. 25, J. Aarnio et al.
Y. Suzuki et al; Polarization Mode Selective Channel Wave-Guides in an InGaAs/InP Disordered Superlattice; Dec. 1990; pp. 2745-2747; App. Phys. Lett. 57 (26).
Koninklijke PTT Nederland N.V.
Lee John D.
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