Optical waveguides – With optical coupler – Input/output coupler
Patent
1994-09-02
1995-11-14
Gonzalez, Frank
Optical waveguides
With optical coupler
Input/output coupler
385 46, 385 39, 385 24, G02B 634
Patent
active
054674182
ABSTRACT:
An optical appliance includes at least one input waveguide and a first free space region connected to the input waveguide. A first plurality of waveguides is connected to the first free space region. An optical grating, which is connected to the first plurality of waveguides, includes a plurality of unequal length waveguides that are divided into at least three waveguide groups. Adjacent waveguides that belong to the same group have a substantially constant path length difference between them while adjacent waveguides belonging to different groups of waveguides have a path length difference between them that differs from the constant path length difference by an odd integer multiple of one-half a preselected wavelength. A second plurality of waveguides is connected to the optical grating and a second free space region is connected to he second plurality of waveguides. At least one output waveguide is connected to the second fee space region. As a result of this arrangement, this optical apparatus has a spectral efficiency which is maximized by providing a relatively wide passband and a relatively narrow channel spacing for a given crosstalk level.
REFERENCES:
patent: 4243297 (1981-01-01), Elion
patent: 4482994 (1984-11-01), Ishikawa
patent: 4566753 (1986-01-01), Mannschke
patent: 4650279 (1987-03-01), Magee
patent: 4707062 (1987-11-01), Abe et al.
patent: 4750802 (1988-06-01), Bhagavatula
patent: 4786131 (1988-11-01), Mahapatra et al.
patent: 4904042 (1990-02-01), Dragone
patent: 5002350 (1991-03-01), Dragone
patent: 5039993 (1991-08-01), Dragone
patent: 5136671 (1992-08-01), Dragone
patent: 5243672 (1993-09-01), Dragone
patent: 5339157 (1994-08-01), Glance et al.
patent: 5367586 (1994-11-01), Glance et al.
"Silica-Based Single-Mode Waveguides on Silicon . . . ", N. Takato et al., IEEE Journal of Lightwave Technology, vol. 6, No. 6, Jun. 1988, pp. 1003-1009.
"Glass Waveguides on Silicon For Hybrid Optical Packaging", C. H. Henry et al., Journal of Lightwave Technology, vol. 7, No. 10, Oct. 1989, pp. 1530-1539.
"Arrayed-Waveguide Grating For Wavelength Division Multi-Demultiplexers With Nanometre Resolution", H. Takahashi et al., Electronics Letters, vol. 26, No. 2, 18 Jan. 1990, pp. 87-88.
"Optical Channel Wavegude Array . . . ", Boyd et al., Optical Engineering, vol. 19, No. 3, May/Jun. 1980, pp. 387-391.
"A Six-Channel Wavelength Multiplexer and Demultiplexer . . .", Lipson et al., Journal of Lightwave Technology, vol. LT-3, No. 5, Oct. 1985, pp. 1159-1163.
"New Focusing of Dispersive Planar Component Based On An Optical Phased Array", M. K. Smit, Electronics Letters, vol. 24, No. 7, 31 Mar. 1988, pp. 385-386.
"Monolithic InP-Based Grating Spectrometer . . . ", J. B. D. Soole et al., Electronics Letters, vol. 17, No. 2, Jan. 17, 1991, pp. 132-134.
"Four-Channel Integrated-Optic Wavelength Demultiplexer . . . ", A. R. Vellekoop et al., Journal Of Lightwave Technology, vol. 9, No. 3, Mar. 1991, pp. 310-314.
"Multi/Demultiplexer for Nanometer-Spacing WDM . . . ", H. Takahashi et al., Paper PD-1, Integrated Photonics Research Conference, Apr. 1991, Monterey, Calif.
"Design and Fabrication of Integrated-Optic . . . ", K. Okamoto et al., Electronics Letters, vol. 27, No. 9, Apr. 25, 1991, pp. 774-775.
Co-Pending U.S. Patent Application Ser. No. 08/238,074 filed on May 2, 1994, entitled "Frequency Routing Device Having A Wide And Substantially Flat Passband," (C. Dragone Case 38).
AT&T IPM Corp.
Gonzalez Frank
Mayer Stuart H.
Palmer Phan T. H.
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