Materials, Photonic Devices, and Sensors

Planar concave grating wavelength demultiplexers with flattened spectral response based on SU-8 polymer waveguides

[+] Author Affiliations
Guomin Jiang, Hui Lu, Kai Shen, Michael R. Wang

University of Miami, Department of Electrical and Computer Engineering, 1251 Memorial Drive, Coral Gables, Florida 33146, United States

Sarfaraz Baig

University of Miami, Department of Biomedical Engineering, 1251 Memorial Drive, Coral Gables, Florida 33146, United States

Opt. Eng. 55(3), 037104 (Mar 11, 2016). doi:10.1117/1.OE.55.3.037104
History: Received November 24, 2015; Accepted February 19, 2016
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Abstract.  Planar concave grating wavelength demultiplexers with a flattened spectral response are realized based on SU-8 polymer waveguides. The flattened spectral response is accomplished by using an optimized multimode interference (MMI) coupler as the input aperture of the planar waveguide for all spectrally separated channels. The mode field distribution at the input of the planar waveguide is controlled by adjusting the width of the input taper connected to the MMI coupler. The devices are fabricated by cost-effective one-step UV lithography. Experimental results show that the desired flattened spectral response has been realized. The on-chip loss, crosstalk, and nonuniformity of the fabricated device are 14.8, 22, and 2.5 dB, respectively.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Guomin Jiang ; Sarfaraz Baig ; Hui Lu ; Kai Shen and Michael R. Wang
"Planar concave grating wavelength demultiplexers with flattened spectral response based on SU-8 polymer waveguides", Opt. Eng. 55(3), 037104 (Mar 11, 2016). ; http://dx.doi.org/10.1117/1.OE.55.3.037104


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