Optical router using stationary imaging

Details Optical router using stationary imaging Optical router using stationary imaging

2007-10-16

2007-10-16

Pak, Sung (Department: 2874)

Optical waveguides

With optical coupler

Plural

C385S037000, C385S132000

Reexamination Certificate

active

11590403

ABSTRACT:
A planar optical filter consisting of two stages performing stationary imaging between an input waveguide and a set of output waveguides is characterized by reduced crosstalk and minimal loss variation in each passband. The input stage is a small waveguide grating router, connected to the output stage by a waveguide lens essentially covering the entire central zone of the input router. In one embodiment, the second stage includes two waveguide grating routers and the lens has two separate output apertures, respectively connected to these two routers. In this arrangement, 2N input channels applied to the input port are separated by the first grating into two interleaved sets of N channels each. The two sets are respectively transferred by the composite waveguide lens to the two output gratings which respectively separate the N channels of each set. In another embodiment, the output router only includes one output grating, and several stationary images are produced, at the same waveguide location, by different orders of the output grating.

REFERENCES:
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Dragone, C. “Theory of Wavelength Multiplexing with Rectangular Transfer Functions”, IEEE Journal of Selected Topics in Quantum Electronics, vol. 8, No. 6, Nov./Dec. 2002, pp. 1168-1178.

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