High resolution optical multiplexing and demultiplexing device i

Details High resolution optical multiplexing and demultiplexing device i High resolution optical multiplexing and demultiplexing device i

1997-02-21

1999-06-29

Boudreau, Leo H.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

385132, 359124, H04J 1402, G02B 610

Patent

active

059176253

ABSTRACT:
An optical multiplexing and demultiplexing device of a type using a lens and a diffraction grating, which incorporates a waveguide array having waveguide channels with narrow spacings for facilitating high resolution, where the narrow spacings are realized by forming an etching groove between each adjacent waveguide channels and providing a measure for preventing optical coupling among the waveguide channels in the form of an air gap, or a layer having a refractive index lower than a cladding layer, or a layer for absorbing/reflecting light, which is provided in the etching groove. The device also incorporates a reflection mirror for reflecting the initially diffracted lights from the diffraction grating back to the diffraction grating, such that the diffracting grating diffracts the diffracted lights reflected back from the reflection mirror again to produce wavelength division multiplexed/demultiplexed optical signals in high resolution.

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Lipson et al., "A Six-Channel Wavelength Multiplexer and Demultiplexer for Single Mode Systems", J. Lightwave Tech., vol. LT-3, No. 5, Oct. 1985, pp. 1159-1163.
Teiichi Shimomura, "A Multi-Press Spectrometer", Japanese Journal of Applied Physics, vol. 3, No. 8, Aug. 1964, pp.459-470.

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