UV-written long-period waveguide grating coupler for broadband add/drop multiplexing |
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Authors: | CK Chow Q Liu KP Lor HP Chan |
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Institution: | Department of Electronic Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Hong Kong, China |
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Abstract: | We demonstrate a UV-written polymer long-period waveguide grating (LPWG) coupler, which offers a bandwidth of ∼20 nm, a maximum coupling efficiency of ∼80% and ∼60% for the TE and TM polarizations, respectively, and a wavelength-tuning range over the (S + C + L)-band (∼140 nm) with a temperature control of ∼25 °C. The LPWG coupler has the potential to be developed into a practical broadband add/drop multiplexer for coarse wavelength-division-multiplexing applications. |
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Keywords: | Integrated optics Long-period waveguide grating (LPWG) Optical coupler Optical waveguide Polymer waveguide UV-writing |
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