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Proceedings Paper

Modified Hamming function weighted waveguide structure for the broadband and minimized mismatched optical couplers
Author(s): Chi-Feng Chen; Yun-Sheng Ku; Tsu-Te Kung; Hau-Wei Wang; Mau-Shiun Yeh
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Paper Abstract

We numerically investigate a new function modified from Hamming function to apply in weighting the waveguide structure of a mismatched optical coupler with the characteristics of low crosstalk, short length, and broad C+L-band. The full factorial design and beam propagation method are being used to seek the optimal structure parameters of coupling waveguide. This modified Hamming weighting function (M-HWF) is proved to have the superior performances to Hamming weighting function (HWF) in several ways. In theoretical computation, the M-HWF and HWF waveguides have the coupling lengths of 11 mm and 16 mm, respectively at crosstalk of -40 dB and operating wavelength of 1.57 μm. After the numerical design of waveguide structure parameters, the M-HWF also obtain a shorter coupling length of 4.50 mm than coupling length of 5.90 mm of HWF at crosstalk of -40 dB and within the C+L-band (1.53~1.61 μm). The M-HWF waveguide with the shortest coupling length of 4.5 mm can even reach a broader bandwidth between 1.50 and 1.70 μm.

Paper Details

Date Published: 2 December 2009
PDF: 8 pages
Proc. SPIE 7630, Passive Components and Fiber-based Devices VI, 76300Y (2 December 2009); doi: 10.1117/12.855200
Show Author Affiliations
Chi-Feng Chen, National Central Univ. (Taiwan)
Yun-Sheng Ku, National Central Univ. (Taiwan)
Tsu-Te Kung, National Central Univ. (Taiwan)
National United Univ. (Taiwan)
Hau-Wei Wang, Industrial Technology Research Institute (Taiwan)
Mau-Shiun Yeh, Chung-Shan Institute of Science and Technology (Taiwan)


Published in SPIE Proceedings Vol. 7630:
Passive Components and Fiber-based Devices VI
Perry P. Shum, Editor(s)

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