Optical multi/demultiplexer device, optical wavelength...

Optical waveguides – With optical coupler – Plural

Reexamination Certificate

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C385S132000, C385S129000, C385S131000, C385S130000, C385S037000, C385S014000, C385S045000

Reexamination Certificate

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07123789

ABSTRACT:
An optical wavelenth selective filter on an optical waveguide and a method of making the same is provided. The filter is able to transmit a first predetermined band of wavelengths and to reflect a second predetermined band. The filter further includes a plurality of transmissive couples and reflective couples in series, with each of the couples including a first zone of high refractive index and a second zone of low refractive index adjacent to each other so as to form a structure with a high gap modulated refractive index.

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patent: 6580863 (2003-06-01), Yegnanarayanan et al.
patent: WO 01/50644 (2001-07-01), None
Loh et al.; “Novel Designs for Sampled Grating-Based Multiplexers-Demultiplexers”; Optics Letters, vol. 24, No. 21, pp. 1457-1459, (1999).
Shibata et al.; “Coupling Coefficient Modulation of Waveguide Grating Using Sampled Grating”; IEEE Photonics Technology Letters, vol. 6, No. 10, pp. 1222-1224, (1994).
Zengerle et al.; “Phase-Shifted Bragg-Grating Filters With Improved Transmission Characteristics”; Journal of Lightwave Technology, vol. 13, No. 12, pp. 2354-2358, (1995).

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