Optical waveguides – With optical coupler – Input/output coupler
Patent
1998-05-04
2000-01-11
Palmer, Phan T. H.
Optical waveguides
With optical coupler
Input/output coupler
385 24, 385 37, G02B 626
Patent
active
060144823
ABSTRACT:
A wavelength selective optical device includes a two-dimensional grating (6) and a device 11. The two-dimensional grating represents an intrinsic function. The device (11) is to change the complex amplitude of the electromagnetic field of the light wave, according to a filtering function, and is to expand the image spot into a monochromatic light in the direction of the spectral dispersion. An optical fiber wavelength multiplexer-demultiplexer includes a filter (11), a mirror (9) and a grating (6). The optical axis of the mirror passes through the plane of the grating and is parallel to the lines of the grating. The filter (11) is arranged in the vicinity of the mirror to control the intrinsic function of the multiplexer-demultiplexer.
REFERENCES:
patent: 4387955 (1983-06-01), Ludman et al.
patent: 5412744 (1995-05-01), Dragone
patent: 5467418 (1995-11-01), Dragone
patent: 5748815 (1998-05-01), Hamel et al.
J. B. D. Soole et al: "Use of Multimode Interference Couplers to Broaden the Passband of Wavelength-Dispersive Integrated WDM Filters", IEEE Photonics Technology Letters, vol. 8, No. 10, Oct., 1996, pp. 1340-1342.
Instruments S.A.
Palmer Phan T. H.
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