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Proceedings Paper

UV-written buried waveguides in benzocyclobutene
Author(s): Kin Seng Chiang; Kar Pong Lor; Qing Liu; Hau Ping Chan
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Paper Abstract

We demonstrate a simple UV-writing technique for the fabrication of buried waveguides using a UV lamp as the source and benzocyclobutene (BCB) and epoxy OPTOCAST 3553 as the waveguide materials. We find that the refractive index of the core material BCB can be increased by as much as 0.01 after UV exposure, while the refractive index of the cladding material epoxy OPTOCAST 3553 is not affected by the UV light. Based on these material properties, buried channel waveguide devices are formed by UV irradiation of an epoxy-clad BCB slab waveguide through a mask. We demonstrate the technique with a straight single-mode waveguide, a Y-junction waveguide branch, and a long-period waveguide grating. The propagation loss of the waveguide fabricated by this technique is 1.8 dB/cm at 1550 nm and the polarization-dependent loss is 0.15 dB/cm.

Paper Details

Date Published: 4 October 2006
PDF: 8 pages
Proc. SPIE 6351, Passive Components and Fiber-based Devices III, 63511J (4 October 2006); doi: 10.1117/12.688685
Show Author Affiliations
Kin Seng Chiang, City Univ. of Hong Kong (Hong Kong China)
Kar Pong Lor, City Univ. of Hong Kong (Hong Kong China)
Qing Liu, City Univ. of Hong Kong (Hong Kong China)
Hau Ping Chan, City Univ. of Hong Kong (Hong Kong China)


Published in SPIE Proceedings Vol. 6351:
Passive Components and Fiber-based Devices III
Sang Bae Lee; Yan Sun; Kun Qiu; Simon C. Fleming; Ian H. White, Editor(s)

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