We experimentally demonstrate the simultaneous generation of tunable multi-wavelength picosecond laser pulses using a self-seeding configuration that consists of a gain-switched Fabry-Perot laser diode （FPLD） with a...We experimentally demonstrate the simultaneous generation of tunable multi-wavelength picosecond laser pulses using a self-seeding configuration that consists of a gain-switched Fabry-Perot laser diode （FPLD） with an external cavity formed by a tilted multimode fiber Bragg grating. Dual- and triple-wavelength pulses are obtained and tuned in a flexible manner by changing the temperature of the FPLD. The side mode suppression ratio larger than 25 dB is achieved at different dual- and triple-wavelengths and the typical pulsewidth of the output pulses is ,-70 ps. In the experiment, the wavelength separation can be narrowed to 0.57 nm.展开更多
In this letter, a novel mechanism of hybrid optical bistability is proposed by using nonlinear mechanism in the frequency domain. This device is based on electro-optical feedback through the fiber Bragg grating on pie...In this letter, a novel mechanism of hybrid optical bistability is proposed by using nonlinear mechanism in the frequency domain. This device is based on electro-optical feedback through the fiber Bragg grating on piezoelectric transducer (PZT) to tune continuous wave (CW) fiber laser. The optical bistable characteristics for two manners of separately alternating input power and bias voltage are discussed. The smallest wavelength shift of the order of 0.001 nm needed to realize a switching process in this optical bistability device is estimated. The potential applications of this device in the optical fiber sensor technique are also discussed.展开更多
This paper reviews a wide variety of fiber-optic microstructure(FOM)sensors,such as fiber Bragg grating(FBG)sensors,long-period fiber grating(LPFG)sensors,Fabry-Perot interferometer(FPI)sensors,Mach-Zchnder interferom...This paper reviews a wide variety of fiber-optic microstructure(FOM)sensors,such as fiber Bragg grating(FBG)sensors,long-period fiber grating(LPFG)sensors,Fabry-Perot interferometer(FPI)sensors,Mach-Zchnder interferometer(MZI)sensors,Michelson interferometer(MI)sensors,and Sagnac interferometer(SI)sensors.Each FOM sensor has been introduced in the terms of structure types,fabrication methods,and their sensing applications.In addition,the sensing characteristics of different structures under the same type of FOM sensor are compared,and the sensing characteristics of the all FOM sensors,including advantages,disadvantages,and main sensing parameters,are summarized.We also discuss the future development of FOM sensors.展开更多
A probe-shaped sensor for simultaneous temperature and pressure measurement was reported in this article.The effective length of the sensor was〜2 mm,consisting of a fiber Bragg grating(FBG)and a Fabry-Perot interferom...A probe-shaped sensor for simultaneous temperature and pressure measurement was reported in this article.The effective length of the sensor was〜2 mm,consisting of a fiber Bragg grating(FBG)and a Fabry-Perot interferometer(FPI)with a nano silica diaphragm.The response sensitivities of the sensor for pressure and temperature were measured as-0.98 nm/MPa and 11.10pm/℃,respectively.This sensor had an extremely low cross-sensitivity between pressure and temperature,which provided a significant potential in dual-parameter sensing.展开更多
为了测量白酒蒸馏过程中的温度和酒精溶度,制作了一种基于马赫曾德仪(MZI)与光纤布拉格光栅(FBG)级联的可同时测量温度和酒精溶液浓度的光纤传感器。FBG是利用飞秒激光逐线刻写的方式在单模光纤(SMF)中制作的周期为2.2μm,布拉格波长为1...为了测量白酒蒸馏过程中的温度和酒精溶度,制作了一种基于马赫曾德仪(MZI)与光纤布拉格光栅(FBG)级联的可同时测量温度和酒精溶液浓度的光纤传感器。FBG是利用飞秒激光逐线刻写的方式在单模光纤(SMF)中制作的周期为2.2μm,布拉格波长为1 591.21 nm,透射谱深度可达23 d B的4阶光纤布拉格光栅;MZI是将细芯光纤和SMF采用纤芯错位和锥腰扩大熔接技术制作的腔长为8.7 mm,对比度为28.5 d B的透射式光纤干涉传感器。基于多光束干涉理论对传感器的温度和酒精溶液浓度传感特性进行分析,利用MZI干涉波谷与FBG透射峰的灵敏度差异,结合灵敏度系数矩阵实现对温度和酒精溶液浓度的同时测量。实验中,传感器的酒精溶液浓度和温度灵敏度分别可达-41.37 pm/%和58.96 pm/℃。该传感结构在白酒酿造产业有潜在的应用前景。展开更多
基金supported by the Project of Shanghai Science & Technology Committee (Nos. 09530500600 and 09PJ1404600)the Key Project of Shanghai Education Committee (No. 09ZZ92)+1 种基金partly supported by the Shanghai Leading Academic Discipline Project under Grant No. S30108.the support provided by the Program for Professors of Special Appointment (Eastern Scholar) at the Shanghai Institutions of Higher Learning, China
文摘We experimentally demonstrate the simultaneous generation of tunable multi-wavelength picosecond laser pulses using a self-seeding configuration that consists of a gain-switched Fabry-Perot laser diode （FPLD） with an external cavity formed by a tilted multimode fiber Bragg grating. Dual- and triple-wavelength pulses are obtained and tuned in a flexible manner by changing the temperature of the FPLD. The side mode suppression ratio larger than 25 dB is achieved at different dual- and triple-wavelengths and the typical pulsewidth of the output pulses is ,-70 ps. In the experiment, the wavelength separation can be narrowed to 0.57 nm.
文摘In this letter, a novel mechanism of hybrid optical bistability is proposed by using nonlinear mechanism in the frequency domain. This device is based on electro-optical feedback through the fiber Bragg grating on piezoelectric transducer (PZT) to tune continuous wave (CW) fiber laser. The optical bistable characteristics for two manners of separately alternating input power and bias voltage are discussed. The smallest wavelength shift of the order of 0.001 nm needed to realize a switching process in this optical bistability device is estimated. The potential applications of this device in the optical fiber sensor technique are also discussed.
基金funded by the National Natural Science Foundation of China(NCSF)(Grant Nos.51205049,51875091,and 51327806)the state 111 Project(Grant No.Bl4039).
文摘This paper reviews a wide variety of fiber-optic microstructure(FOM)sensors,such as fiber Bragg grating(FBG)sensors,long-period fiber grating(LPFG)sensors,Fabry-Perot interferometer(FPI)sensors,Mach-Zchnder interferometer(MZI)sensors,Michelson interferometer(MI)sensors,and Sagnac interferometer(SI)sensors.Each FOM sensor has been introduced in the terms of structure types,fabrication methods,and their sensing applications.In addition,the sensing characteristics of different structures under the same type of FOM sensor are compared,and the sensing characteristics of the all FOM sensors,including advantages,disadvantages,and main sensing parameters,are summarized.We also discuss the future development of FOM sensors.
基金This work was supported by National Natural Science Foundation of China(NSFC)(Grant Nos.61905165 and 61635007)Natural Science Foundation of Guangdong Province(Grant Nos.2019A050510047,2019B1515120042,and 2018A030310581)+1 种基金Education Department of Guangdong Province(Grant No.2018KQNCX219)Science and Technology Innovation Commission of Shenzhen(Grant Nos.JCYJ20170412105604705,JCYJ20180305125352956,JCYJ20170818143853289,and JC YJ20170818093743767).
文摘A probe-shaped sensor for simultaneous temperature and pressure measurement was reported in this article.The effective length of the sensor was〜2 mm,consisting of a fiber Bragg grating(FBG)and a Fabry-Perot interferometer(FPI)with a nano silica diaphragm.The response sensitivities of the sensor for pressure and temperature were measured as-0.98 nm/MPa and 11.10pm/℃,respectively.This sensor had an extremely low cross-sensitivity between pressure and temperature,which provided a significant potential in dual-parameter sensing.
文摘为了测量白酒蒸馏过程中的温度和酒精溶度,制作了一种基于马赫曾德仪(MZI)与光纤布拉格光栅(FBG)级联的可同时测量温度和酒精溶液浓度的光纤传感器。FBG是利用飞秒激光逐线刻写的方式在单模光纤(SMF)中制作的周期为2.2μm,布拉格波长为1 591.21 nm,透射谱深度可达23 d B的4阶光纤布拉格光栅;MZI是将细芯光纤和SMF采用纤芯错位和锥腰扩大熔接技术制作的腔长为8.7 mm,对比度为28.5 d B的透射式光纤干涉传感器。基于多光束干涉理论对传感器的温度和酒精溶液浓度传感特性进行分析,利用MZI干涉波谷与FBG透射峰的灵敏度差异,结合灵敏度系数矩阵实现对温度和酒精溶液浓度的同时测量。实验中,传感器的酒精溶液浓度和温度灵敏度分别可达-41.37 pm/%和58.96 pm/℃。该传感结构在白酒酿造产业有潜在的应用前景。
