Title :
Refractive index change by photoinduction of a UV-sensitive SMF-to-PWG coupler
Author :
Jang, Su-Won ; Yun, Yun-Hyun ; Kim, Do-Eok ; Lim, Seon-Jeong ; Park, Su-Young ; Lee, Young-Hyun ; Kang, Shin-Won
Author_Institution :
Dept. of Electron. Eng., Kyungpook Nat. Univ., Daegu, South Korea
Abstract :
We fabricated a UV-sensitive photofunctional device using evanescent field coupling between a side-polished single-mode optical fiber (SMF) and photochromic dye-dispersed polymer planar waveguide (PWG). PWG was made by diarylethene derivative [1,2-bis(2,5-dimethylthiophen-3-yl) hexafluoro-cyclopentene (DM-BTE)] with a stability and memory effect by photoinduction. The wavelength response characteristic for UV irradiation time was 3.44 nm (UV irradiation time 60 s), and recovery time was 140 s. The optical attenuation characteristic of 1310-nm wavelength was 0.4 dB in 1 wt% concentration of DM-BTE and 1.65 dB at 10 wt% DM-BTE. The refractive index changes of DM-BTE by photoinduction were Δn=0.00067 in the condition of 3 wt% of DM-BTE concentration and 5 mW of UV intensity and 70 s of UV irradiation time.
Keywords :
dyes; optical fibre couplers; optical planar waveguides; optical polymers; photochromism; refractive index; ultraviolet radiation effects; 1310 nm; 140 s; 5 mW; 60 s; 70 s; SMF-to-PWG coupler; UV irradiation; UV-sensitive coupler; UV-sensitive device; [1,2-bis(2,5-dimethylthiophen-3-yl) hexafluoro-cyclopentene; diarylethene derivative; evanescent field coupling; memory effect; optical attenuation; photochromic dye-dispersed polymer waveguide; photofunctional device; photoinduction; planar waveguide; refractive index change; refractive index changes; side-polished fiber; single-mode optical fiber; stability; wavelength response characteristic; Optical attenuators; Optical coupling; Optical fibers; Optical planar waveguides; Optical polymers; Optical waveguides; Photochromism; Planar waveguides; Refractive index; Stability; Diarylethene derivative [1,2-bis(2,5-dimethylthiophen- 3-yl) hexafluoro-cyclopentene (DM-BTE)]; UV sensitive; evanescent field; polymer waveguide; side-polished fiber;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2005.861624
