Open AccessPolymer waveguide WDM channel selector operating over the entire C and L bands
Author(s) -
Taehyun Park,
Sung-Moon Kim,
Suhyun Park,
Jakyeom Seo,
Hak-Gyu Lee,
MinCheol Oh
Publication year - 2018
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.016323
Subject(s) - optics , materials science , fiber bragg grating , circulator , wavelength division multiplexing , channel spacing , wavelength , optical circulator , waveguide , grating , bragg's law , polarization (electrochemistry) , optoelectronics , multiplexing , physics , diffraction , telecommunications , chemistry , computer science
A tunable channel selector operating over both the C and L bands of wavelength-division-multiplexing optical network is proposed based on a thermo-optic tunable Bragg grating device in a polymer waveguide. A tilted Bragg grating cascaded with an asymmetric Y-branch waveguide effectively implements a small Bragg-reflection wavelength filter that does not require an external circulator. To increase the operating wavelength span of the channel selector, two Bragg gratings with different periods are fabricated on a single substrate for covering C and L bands, respectively. A wide tuning range over 80 nm along with a narrow bandwidth is demonstrated. Moreover, the polarization dependence of the reflection spectrum is observed to be less than 0.1 nm.