Thermally stable and low-loss optical waveguide using optical-fiber-embedded epoxy matrix for optical printed-circuit board applications

Dong-Min Im; Jong-Hun Kim; Mu Hee Cho; Do-Won Kim; Sung-Jun Kim; Jae-Bong Choi; Hyo-Hoon Park

doi:10.1117/12.842247

24 February 2010 Thermally stable and low-loss optical waveguide using optical-fiber-embedded epoxy matrix for optical printed-circuit board applications

Dong-Min Im, Jong-Hun Kim, Mu Hee Cho, Do-Won Kim, Sung-Jun Kim, Jae-Bong Choi, Hyo-Hoon Park

Author Affiliations +

Proceedings Volume 7607, Optoelectronic Interconnects and Component Integration IX; 76070V (2010) https://doi.org/10.1117/12.842247
Event: SPIE OPTO, 2010, San Francisco, California, United States

Abstract

This paper proposes a low-loss and thermally stable waveguide component for optical printed-circuit board (OPCB) applications. The proposed waveguide component is formed using silica fiber as a waveguide medium and seamlessly linking the 90°-bent parts to the planar optical layer. The component was designed through considerations of optical loss, mechanical failure, thermal stability, module packaging, and applicability in PCB system in determination of fiber-core-diameter, bending radius, waveguide-mounting epoxy material, and packaging structure. In the experiment, we used a multimode fiber with 100μm-core-diameter, a MT-ferrule component to hold the 90°-bent fiber and to package the surface modules, and a 353ND thermo-curable epoxy resin to mount the ferrule parts on planar fiber layer. The optimized bending radius was selected near 3mm to avoid mechanical failure. The measured average value of the insertion loss for the whole waveguide component was as low as -0.145dB. In the thermal test similar to the PCB lamination process, the loss characteristics were not significantly degraded. In the packaging of optical transmitter (Tx) and receiver (Rx) modules, we used a ceramic lid on which optical devices and IC chips were integrated and guide holes were formed. The optical Tx/Rx modules assembled on the waveguide plate showed a successful data transmission up to 8Gbps. The results demonstrate that our proposed waveguide component can be applied for a simple fabrication of OPCBs.

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Dong-Min Im, Jong-Hun Kim, Mu Hee Cho, Do-Won Kim, Sung-Jun Kim, Jae-Bong Choi, and Hyo-Hoon Park "Thermally stable and low-loss optical waveguide using optical-fiber-embedded epoxy matrix for optical printed-circuit board applications", Proc. SPIE 7607, Optoelectronic Interconnects and Component Integration IX, 76070V (24 February 2010); https://doi.org/10.1117/12.842247

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KEYWORDS

Waveguides

Packaging

Thermography

Epoxies

Structured optical fibers

Data transmission

Optical interconnects

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