Browsing by Author "Deng, JJ"

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A novel hybrid coupler based on antiresonant reflecting optical waveguides
(1998-06-01)
Deng, JJ
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Huang, YT
;
電子工程學系及電子研究所
;
Department of Electronics Engineering and Institute of Electronics
A novel hybrid coupler based on the antiresonant reflecting optical waveguides (ARROW's) is presented. This device consists of two parallel antiresonant reflecting optical waveguides with a tapered outermost cladding layer. Such a device can provide advantageous features of low radiation loss, low crosstalk at the output end, and compatible core dimensions and indexes with single-mode optical fibers. The staircase approximation and the eigenmode expansion analysis are used to analyze and optimize this device. In our design on a Si-substrate, radiation losses below 0.38 dB and extinction ratios below -20 dB for two waveguide channels are achieved. The beam propagation method (BPM) is also used to verify our design and analysis results.
Loss reduction of abrupt waveguide-bends using Fabry-Perot cavity for optical interconnects
(1997)
Deng, JJ
;
Huang, YT
;
交大名義發表
;
電子工程學系及電子研究所
;
National Chiao Tung University
A novel low-loss bending structure in dielectric waveguides is proposed. In the proposed structure, an antiresonant Fabry-Perot cavity parallel to the original waveguide is added at the outer side of the bend in order to reduce the bending loss. Based on a simple design rule for the antiresonant cavity, the materials can be flexibly chosen to be adapted to fabrication methods. The beam propagation method is used to verify this low-loss design. The double-bend and curved structures using the same principle for further loss improvement are also presented.