Patent
1981-03-20
1984-10-02
Lee, John D.
G02B 514
Patent
active
044744242
ABSTRACT:
The disclosed multiplexer/demultiplexer (10, 40) features input and output optical fibers (20, 22, 24, 42, 44, 46, 48, 50) coupled to one face (16) of a graded refractive index rod collimating lens (12). Associated with the other face (18) of the lens (12) are a plurality of multi-layer dielectric interference filters (26, 32, 52, 54, 56, 58) which selectively reflect the input signals at different angles according to the wavelength and thereby direct them back through the lens (12) to the appropriate output fiber.
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Mahlein et al., Electronics Letters, vol. 16, No. 15, Jul. 17, 1980, pp. 584-585, "Interference Filter All-Fiber Directional Coupler . . . ".
Tanaka et al., Electronics Letters, vol. 16, No. 23, Nov. 6, 1980, pp. 869-870, "Simple Structure High Isolation Multi/Demultiplexer".
Hashimoto et al., Optical Communication Conference (5th European Conference on Optical Communication), Amsterdam, Sep. 17-19, 1979, "Low-Loss Optical Multi/Demultiplexer Using Interference Filters", pp. 11.5-1-11.5-3.
AT&T Bell Laboratories
Gonzalez Frank
Lee John D.
Ulbrich Volker R.
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