An asymmetric heating method for fusion splicing of 1 060-XP silica fiber （1 060F） and phosphate glass fiber （PGF） using an electric arc splicer has been proposed. Double joints with the lowest splice loss of 0.6 ...An asymmetric heating method for fusion splicing of 1 060-XP silica fiber （1 060F） and phosphate glass fiber （PGF） using an electric arc splicer has been proposed. Double joints with the lowest splice loss of 0.6 dB and good bending-resist strength between 1 060 F and PGF has been obtained. The main reasons affecting fiber splice loss and strength have been analyzed.展开更多
提出了一种He气辅助熔接的全光纤型空芯光子晶体光纤(HC-PCF)低压气体腔的制备方法。通过用高压待充气体冲洗HC-PCF,确保了腔内的气体纯度;通过利用光谱监测系统监测HC-PCF降压过程及He气辅助熔接过程中CO2吸收光谱的变化,研究了HC-PCF...提出了一种He气辅助熔接的全光纤型空芯光子晶体光纤(HC-PCF)低压气体腔的制备方法。通过用高压待充气体冲洗HC-PCF,确保了腔内的气体纯度;通过利用光谱监测系统监测HC-PCF降压过程及He气辅助熔接过程中CO2吸收光谱的变化,研究了HC-PCF中气体动力学运动过程;通过利用He气辅助熔接方法,制备得到压强为7 k Pa、插入损耗小于2 d B、长度为10 m的全光纤型HC-PCF低压CO2气体腔。该方法也适用于更低压强的HC-PCF气体腔的研制,且制备的气体腔具有良好的气密性和长期稳定性。展开更多
The recent progresses of fiber sensor fabrication in our group are reviewed.Novel inline fiber Mach-Zehnder interferometer(MZI) sensors with various structures are proposed and manufactured by femtosecond laser fabric...The recent progresses of fiber sensor fabrication in our group are reviewed.Novel inline fiber Mach-Zehnder interferometer(MZI) sensors with various structures are proposed and manufactured by femtosecond laser fabrication and fusion splicing for high-quality sensing of refractivity-sensitive parameters such as temperature,concentration,humidity,pressure,stress and strain: a) for an MZI sensor with a trench on a single-mode fiber,the refractive index(RI) sensitivity of acetone vapor is about 104 nm/RIU(refractive index unit) and the temperature sensitivity is 51.5 pm/℃ from 200 to 875 ℃;b) For an MZI consisting of two micro-air-cavities,the sensitivity is 501.5 nm/RIU and the detection limit is 1.994×10-6 RIU at the refractive index of 1.4;c) to reduce the fabrication cost,a new fusion-splicing based method is proposed to fabricate MZI sensors;the sensitivity is 664.57 nm/RIU with a detection limit of 1.5×10-6 RIU and its cost is tens of times cheaper than those of commercialized long period fiber Gratings;Also,5×10-5 acetone vapors are successfully detected by the MZI sensors coated with zeolite thin films.展开更多
基金Funded by the Guangdong Science and Technology Program (No.2005A10602001)the Guangzhou Science and Technology Program (No.2006Z2-D0161)the Program for New Century Excellent Talents (No.NCET-04-0821)
文摘An asymmetric heating method for fusion splicing of 1 060-XP silica fiber （1 060F） and phosphate glass fiber （PGF） using an electric arc splicer has been proposed. Double joints with the lowest splice loss of 0.6 dB and good bending-resist strength between 1 060 F and PGF has been obtained. The main reasons affecting fiber splice loss and strength have been analyzed.
文摘提出了一种He气辅助熔接的全光纤型空芯光子晶体光纤(HC-PCF)低压气体腔的制备方法。通过用高压待充气体冲洗HC-PCF,确保了腔内的气体纯度;通过利用光谱监测系统监测HC-PCF降压过程及He气辅助熔接过程中CO2吸收光谱的变化,研究了HC-PCF中气体动力学运动过程;通过利用He气辅助熔接方法,制备得到压强为7 k Pa、插入损耗小于2 d B、长度为10 m的全光纤型HC-PCF低压CO2气体腔。该方法也适用于更低压强的HC-PCF气体腔的研制,且制备的气体腔具有良好的气密性和长期稳定性。
基金supported by the National Natural Science Foundation of China(Nos.90923039 and 51025521)the 111 Project of China(No.B08043)
文摘The recent progresses of fiber sensor fabrication in our group are reviewed.Novel inline fiber Mach-Zehnder interferometer(MZI) sensors with various structures are proposed and manufactured by femtosecond laser fabrication and fusion splicing for high-quality sensing of refractivity-sensitive parameters such as temperature,concentration,humidity,pressure,stress and strain: a) for an MZI sensor with a trench on a single-mode fiber,the refractive index(RI) sensitivity of acetone vapor is about 104 nm/RIU(refractive index unit) and the temperature sensitivity is 51.5 pm/℃ from 200 to 875 ℃;b) For an MZI consisting of two micro-air-cavities,the sensitivity is 501.5 nm/RIU and the detection limit is 1.994×10-6 RIU at the refractive index of 1.4;c) to reduce the fabrication cost,a new fusion-splicing based method is proposed to fabricate MZI sensors;the sensitivity is 664.57 nm/RIU with a detection limit of 1.5×10-6 RIU and its cost is tens of times cheaper than those of commercialized long period fiber Gratings;Also,5×10-5 acetone vapors are successfully detected by the MZI sensors coated with zeolite thin films.
