Abstract

A wavelength filter based on a polymer Bragg reflector has received much attention due to its simple structure and wide tuning range. Tilted Bragg gratings and asymmetric Y-branches are integrated to extract the reflected optical signals in different directions. To optimize device performance, design procedures are thoroughly considered and various design parameters are applied to fabricated devices. An asymmetric Y-branch with an angle of 0.3° produced crosstalk less than −25 dB, and the even-odd mode coupling was optimized for a grating tilt angle of 2.5°, which closely followed the design results. Through this experiment, it was confirmed that this device has a large manufacturing tolerance, which is important for mass production of this optical device.

Polymeric tunable wavelength filter with two-stage cascaded tilted Bragg gratings

Tae-Hyun Park, Sung-Moon Kim, and Min-Cheol Oh
Opt. Express 28(7) 10145-10152 (2020)

Tunable channel drop filters consisting of a tilted Bragg grating and a mode sorting polymer waveguide

Tae-Hyun Park, Jin-Soo Shin, Guanghao Huang, Woo-Sung Chu, and Min-Cheol Oh
Opt. Express 24(6) 5709-5714 (2016)

Fabrication of an asymmetric Bragg coupler-based polymeric filter with a single-grating waveguide

Wei-Ching Chuang, Yu-Tai Huang, Hui-Chi Lin, and An-Chen Lee
Opt. Express 19(11) 10776-10788 (2011)

Tunable channel-drop filters consisting of polymeric Bragg reflectors and a mode sorting asymmetric X-junction

Jin-Soo Shin, Tea-Hyun Park, Woo-Sung Chu, Chang-Hee Lee, Sang-Yung Shin, and Min-Cheol Oh
Opt. Express 23(13) 17223-17228 (2015)

Polymeric multi-channel bandpass filters in phase-shifted Bragg waveguide gratings by direct electron beam writing

Lin Zhu, Yanyi Huang, William M. J. Green, and Amnon Yariv
Opt. Express 12(25) 6372-6376 (2004)