Optical device, polarization monitor and optical switch

Details Optical device, polarization monitor and optical switch Optical device, polarization monitor and optical switch

2005-11-15

2005-11-15

Ullah, Akm Enayet (Department: 2874)

Optical waveguides

With optical coupler

Input/output coupler

C385S147000, C359S565000

Reexamination Certificate

active

06965717

ABSTRACT:
The present invention has for its object to provide an optical device whose size is made small. In order to achieve this, according to the present invention there is provided an optical device in which a clad and a core whose refractive index is relatively higher than that of the clad are formed on a substrate and light can be transmitted through the core, wherein the core is provided with an input light transmitting pattern section, a diffraction pattern section, and a phase difference generating pattern section. Further, at least in the phase difference generating pattern section, a part, where refractive indexes are different respectively in the direction parallel to the substrate and in the direction perpendicular to the substrate, is provided.

REFERENCES:
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patent: 2003-107261 (2003-04-01), None
T. Shimoda et al., “Low Temperature Process of Silica Waveguides by TEOS-O3Atmospheric Pressure CVD”, The General Conference, 1996, The Institute of Electronics, Information and Communication Engineers, 1996, p. 230.
T. Hanada, et al., “Polarization Independent Arrayed-Waveguide Grating Based on Silica Waveguide”, The Electronics Society Conference, 1999, The Institute of Electronics, Information and Communication Engineers, 1999, p. 222.
T. Hanada, et al., “FDM/WDM Couplers Using Silica Waveguide Deposited By APCVD”, IEICE Trans., Electron. vol. E80-C, No. 1, Jan. 1997, pp. 130-133.

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