Optical waveguides – Planar optical waveguide
Patent
1997-04-02
1999-07-27
Ullah, Akm E.
Optical waveguides
Planar optical waveguide
G02B 610
Patent
active
059304375
ABSTRACT:
Core comprises a main stem which is formed on a substrate, linearly extending in the beam propagating direction and short branches with a certain length which extend perpendicularly to the beam propagating direction toward both sides along the plane of the substrate and are arranged at regular intervals in the beam propagating direction. Thus, the branches are arranged in a ladder geometry when it is viewed from the top, forming a rectangular waveform arrangement. The core constitutes a grating structure in which the width of the core is made to vary periodically with the branches in the beam propagating direction.
REFERENCES:
patent: 3891302 (1975-06-01), Dabby et al.
patent: 4598262 (1986-07-01), Chen
patent: 5638473 (1997-06-01), Byron
patent: 5717799 (1998-02-01), Robinson
Vincent V. Wong et al.; "Ridge-Waveguide Sidewall-Grating Distributed Feedback Structures Fabricated By X-Ray Lithography"; Journal of Vacuum Science and Technology, Part B, vol. 11 No. 6, Nov. 1, 1993; pp. 2621-2624 .
Hidaka Hiroshi
Nakai Michihiro
Okude Satoshi
Sakai Tetsuya
Shima Kensuke
Fujikura Ltd.
Ullah Akm E.
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