Session Index

Optical Waveguides and Communications

Optical Grattings
Friday, Dec. 8, 2017  14:50-16:20
Presider: Cheng-Ling Lee;Shuo-Yen Tseng
Room: International Research Building IR6002-B(6F)
14:50 - 15:05 Paper No.  2017-FRI-S0208-O001
Wun-Lin Liu Side-Polishing a Tilted-Fiber Bragg Grating for Measuring Temperature and Index
Wun-Lin Liu;Yu-Han Shi;Hung-Ying Chang;Fang-Kuei Liou;Wen-Fung Liu

This study proposes a titled fiber Bragg grating as a sensor of simultaneously measuring the temperature and refractive index. The combination of a tilted-grating with the side-polishing fiber is to improve the sensitivity with the ability to measure the variation of the grating wavelength under various temperatures and various indexes.

15:05 - 15:20 Paper No.  2017-FRI-S0208-O002
Nai-Hsiang Sun Radiation Properties for Fiber Gratings at Second Bragg
Nai-Hsiang Sun;Yan-Cheng Lin;Jung-Sheng Chiang;Ru-Yen Ro

The second-order fiber Bragg gratings have properties of transmission, reflection and radiation. In this paper, we measure the radiation spectrum of second-order fiber Bragg gratings. The forward, upright, and backward radiated angles and radiation efficiencies of fiber Bragg gratings are measured.

15:20 - 15:35 Paper No.  2017-FRI-S0208-O003
Hsien-Yi Liao Ethanol sensor based on a long period fiber grating combined with Polyamide Thin-Film
Hsien-Yi Liao;Hung-Ying Chang;Fan Ku;Wen-Lung Lee;Ming-Yue Fu;Wen-Fung Liu

An ethanol sensor composed of a long period fiber grating and the polyamide thin-film is used for measuring ethanol concentrations under a constant temperature. The operating mechanism is based on the change of cladding index via the reaction between the ethanol and polyamide to cause the grating wavelength shift.

15:35 - 15:50 Paper No.  2017-FRI-S0208-O004
Pei-Wen Chan Anemometer Based on Fiber Bragg Grating
Pei-Wen Chan;Hung-Ying Chang;Teng-Lung Wang;Jui-Nan Cheng;Wen-Fung Liu

A new anemometer based on three fiber Bragg gratings is proposed. The gratings are glued on the metal rod driven by the disc causing the grating wavelength shift. Therefore, the wind speed and the wind direction can be detected by monitoring both the frequency and Bragg wavelength variation of reflection.

15:50 - 16:05 Paper No.  2017-FRI-S0208-O005
Sih-Yuan Chen The Rain Gauge Based on a Fiber Bragg Grating
Sih-Yuan Chen;Hung-Ying Chang;Chan-Yu Kuo;Chuan-Ying Huang;Wen-Fung Liu

In this study we propose a rain gauge based on a fiber Bragg grating. The sensitively of rain gauge is 0.029nm/mm with the measuring range from 0 to 140mm. The operation mechanism is based on the rain weight to pressure the film and then to stretch the grating for measuring.

16:05 - 16:20 Paper No.  2017-FRI-S0208-O006
Chia-Ju Yu Side-lobes suppression in silicon photonics waveguide gratings
Chia-Ju Yu;Tzu-Hsiang Yen;Andrew Grieco;Yeshaiahu Fainman;Yung-Jr Hung

This study dedicates on the employment of Gaussian apodization on the sidewall of silicon strip waveguide gratings to improve side-lobe suppression ratio.We apply asymmetric corrugation widths to avoid the change of effective-index during apodization.These efforts lead to high rejection of up to 36.6 dB for non-resonant light in apodized gratings.