Broadband optical directional full couplers based on Blackman function

Chi Feng Chen, Yun Sheng Ku

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations


A mismatched optical coupler with waveguide weighted by the Blackman function is numerically investigated in the demand of short-length, C+L-band, low crosstalk, and process tolerance. Utilizing the full factorial design, the structure parameters of coupling waveguide are obtained by beam propagation method. In the condition of crosstalk of -33.5 dB, the mismatched optical coupler with proper selected waveguide structure parameters is found to have a coupling length of 2.80 mm in the transmission wavelength ranges of C+L-band (1.53-1.61 μm). Obviously, the selection and design of waveguide structure are very important to satisfy the qualities of a mismatched optical coupler for the demand of short-length, bandwidth, and low-crosstalk.

Original languageEnglish
Article number71342N
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 2008
EventPassive Components and Fiber-based Devices V - Hangzhou, China
Duration: 27 Oct 200830 Oct 2008


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