Demultiplexer with a square spectral response

Details Demultiplexer with a square spectral response Demultiplexer with a square spectral response

1998-11-12

2000-07-25

Palmer, Phan T.H.

Optical waveguides

With optical coupler

Plural

385 46, 385 39, G02B 628

Patent

active

060945133

ABSTRACT:
The present invention relates to a multiplexer and/or demultiplexer optical component of the waveguide array spectrograph type, wherein the waveguides are numbered in order of increasing optical path length, the optical path lengths of the waveguides describing a function of waveguide number which varies about a mean linear function, a difference measured between said waveguide number function and said mean linear function describing a difference function not limited to a set of two linear functions, said difference function being suitable for giving the optical component a spectral response that is square in shape.

REFERENCES:
patent: 5978532 (1999-11-01), Rigny et al.
Okamoto K. et al.: "Arrayed Waveguide Grating Multiplexer With Flat Spectral Response" Jan. 1, 1995, Optics Letters, vol. 20, No. 1 pp. 43-45.
Okamoto K. et al.: "Flat Spectral Response Arrayed-Waveguide Grating Multiplexer With Parabolic Waveguide Horns" Electronics Letters, vol. 32, No. 10, Aug. 29, 1996.
M.R. Amersfoort et al.: "Passeband Broadening of integrated arrayed waveguides filters using multimode interference coupler" Electronics Letters, vol. 32, No. 5 Feb. 29, 1996 pp. 449-451.
"Recent Improvements in Arrayed Waveguide Grating Dense Wavelength Division Multi/Demultiplexers" H. Uetsuka et al. Hitachi Cable Limited.
"Chirping of a MM--Phasar Multiplexer For Application in Multiwavelength Lasers" Delft University of Technology.
"Passband Flattening Of Phasar WDM Using Input And Output Star Couplers Designed With Two Focal Points" D. Trouchet Thursday Afternoon pp. 302-303.
"Taper-Assisted Polarisation Compensation In Efficiently Fibre-Coupled Inp Demultiplexer" by A. Rigny, et al.: Electronics Letters Sep. 26, 1996 vol. 32, No. 20.
"An NxN Optical Multiplexer Using a Planar Arrangement of Two Star Couplers", IEEE Photonics Technology Letters, vol. 3, No.9 Sep. 1991 pp. 812-815.

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