Modified Hamming function weighted waveguide structure for the broadband and minimized mismatched optical couplers

Chi Feng Chen, Yun Sheng Ku, Tsu Te Kung, Hau Wei Wang, Mau Shiun Yeh

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

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.

Original languageEnglish
Title of host publicationPassive Components and Fiber-based Devices VI
DOIs
StatePublished - 2009
EventPassive Components and Fiber-based Devices VI - Shanghai, China
Duration: 2 Nov 20096 Nov 2009

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume7630
ISSN (Print)0277-786X

Conference

ConferencePassive Components and Fiber-based Devices VI
Country/TerritoryChina
CityShanghai
Period2/11/096/11/09

Keywords

  • Coupling waveguide structure
  • Hamming function
  • Mismatched optical coupler
  • Optical directional coupler

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