Title :
Optically controllable all-fiber based radio-frequency phase-shifter
Author :
Peng, P.C. ; Hsiao, V.K.S. ; Chang, T.L. ; Chen, H.Y. ; Yu, Y.C. ; Li, C.Y. ; Lu, H.H.
Author_Institution :
Dept. of Electro-Opt. Eng., Nat. Taipei Univ. of Technol., Taipei, Taiwan
Abstract :
This work develops an optically controllable all-fiber, radio-frequency phase-shifter based on a side-polished fiber (SPF) overlaid with a photo responsive liquid crystals (LCs). The phase shift of the LC-overlaid SPF (LCSPF) is tuned by modulating the refractive index (RI) of LC, which is determined by the phase transition of the overlaying photo responsive LC that is formed by the trans-cis photoisomerization of doped azobenzene molecules under light illumination. All-optically controllable devices have various advantages over all-electrically controllable devices, including compactness and simplicity of design.
Keywords :
liquid crystal devices; microwave photonics; optical fibres; optical modulation; optical phase shifters; optical tuning; organic compounds; refractive index; all-optically controllable devices; doped azobenzene molecules; light illumination; optically controllable all-fiber radiofrequency phase-shifter; phase transition; photoresponsive liquid crystals; refractive index; side-polished fiber; trans-cis photoisomerization; Optical fiber polarization; Optical fiber sensors; Optical filters; Photonics; Radio frequency; Microwave photonics; all-fiber devices; phase shifters;
Conference_Titel :
Microwave Photonics (MWP) and the 2014 9th Asia-Pacific Microwave Photonics Conference (APMP), 2014 International Topical Meeting on
Conference_Location :
Sapporo
DOI :
10.1109/MWP.2014.6994497
