Light waveguide coupler having three or more gates and utilizing

Details Light waveguide coupler having three or more gates and utilizing Light waveguide coupler having three or more gates and utilizing

1986-05-16

1991-02-05

Lee, John D.

Multiplex communications

Wide area network

Packet switching

350 9616, 370 1, G02B 626

Patent

active

049899376

ABSTRACT:
A method for forming a three gate optical coupler, operating on a beam splitting principle, or a five gate optical coupler characterized by providing a carrier block having a pair of marks to define a line of a parting plane, creating a continuous branching waveguide structure having a waveguide node located adjacent to the parting plane of the carrier block by a ion exchange method, parting the carrier block in the parting plane, polishing the parted surfaces and forming a light transmitting optical layer, such as a frequency selective filter layer on a polished surface, then rejoining the two parts with the waveguides aligned. The method is particularly useful in forming three gate and five gate frequency multiplexers/demultiplexers, which have a continuous light waveguide structure except in the location of the frequency selective filter layer.

REFERENCES:
patent: 4306765 (1981-12-01), Winzer et al.
patent: 4317699 (1982-03-01), Winzer et al.
patent: 4541159 (1985-09-01), Michel et al.
patent: 4564755 (1986-01-01), Winzer et al.
patent: 4589724 (1986-05-01), Winzer
patent: 4637682 (1987-01-01), Mahlein et al.
E. Okuda et al., "Planar Gradient-Index Glass Waveguide and its Applications to a 4-Port Branched Circuit and Star Coupler", Applied Optics, vol. 23, No. 11, Jun. 1, 1984, pp. 1745-1748.

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