The gas-sensitive film coated π-phase-shifted long-period fiber grating(LPFG),consisting of two same long-period fiber gratings cascaded by a regular fiber with length of half of the grating period,is proposed for ga...The gas-sensitive film coated π-phase-shifted long-period fiber grating(LPFG),consisting of two same long-period fiber gratings cascaded by a regular fiber with length of half of the grating period,is proposed for gas sensing.The sensitivity of the sensor is defined by the change rate of the transmission at specific wavelength with respect to the film refractive index.The qualitative and numerical analyses show that to get a high sensitivity,the optimal coupling strength of each long-period fiber grating is √2 π/4.With this coupling strength,the longer the grating is,the higher sensitivity the sensor has.By choosing appropriate grating period,a high sensitivity for the film with a certain refractive index and thickness can be attained.展开更多
TN253 2001042688一种光纤式水下机器人滑觉传感器的研究=Research onoptical fiber type slide tactile sensors for underwaterrobot[刊,中]/谭定忠,张立勋,杨勇,王岚,孟庆鑫(哈尔滨工程大学机电工程学院.黑龙江,哈尔滨(150001))//半...TN253 2001042688一种光纤式水下机器人滑觉传感器的研究=Research onoptical fiber type slide tactile sensors for underwaterrobot[刊,中]/谭定忠,张立勋,杨勇,王岚,孟庆鑫(哈尔滨工程大学机电工程学院.黑龙江,哈尔滨(150001))//半导体光电.-2000,21(5).-374-376利用光纤的光强内调制原理设计了一种用于水下机器人的滑觉传感器。介绍了传感器的原理和设计方法,对传感器的静态、动态性能进行了理论和实验研究。展开更多
基金supported by the National Natural Science Foundation of China (No.60777035)the Scientific Research Key Project Fund of the Ministry of Education (No.208040)the Shanghai Leading Academic Discipline Project (No.T0501)
文摘The gas-sensitive film coated π-phase-shifted long-period fiber grating(LPFG),consisting of two same long-period fiber gratings cascaded by a regular fiber with length of half of the grating period,is proposed for gas sensing.The sensitivity of the sensor is defined by the change rate of the transmission at specific wavelength with respect to the film refractive index.The qualitative and numerical analyses show that to get a high sensitivity,the optimal coupling strength of each long-period fiber grating is √2 π/4.With this coupling strength,the longer the grating is,the higher sensitivity the sensor has.By choosing appropriate grating period,a high sensitivity for the film with a certain refractive index and thickness can be attained.
文摘TN253 2001042688一种光纤式水下机器人滑觉传感器的研究=Research onoptical fiber type slide tactile sensors for underwaterrobot[刊,中]/谭定忠,张立勋,杨勇,王岚,孟庆鑫(哈尔滨工程大学机电工程学院.黑龙江,哈尔滨(150001))//半导体光电.-2000,21(5).-374-376利用光纤的光强内调制原理设计了一种用于水下机器人的滑觉传感器。介绍了传感器的原理和设计方法,对传感器的静态、动态性能进行了理论和实验研究。
