A technique is used to enhance the pressure and temperature sensitivity of a fiber Bragg grating sensor.The grating is packaged by using polymer jacket,which exhibits no significant chirp due to the adoption of the sp...A technique is used to enhance the pressure and temperature sensitivity of a fiber Bragg grating sensor.The grating is packaged by using polymer jacket,which exhibits no significant chirp due to the adoption of the special technique.The measured pressure and temperature sensitivity of the structured grating is 6.28×10^(-5)/MPa and5.18×10^(-5)/℃.The wavelength shift due to pressure and temperature can be enhanced about 31.5 times for pressure and 7.7 times for temperature.展开更多
We present a novel and efficient L-band wavelength-tunable Er^3＋ doped fiber laser of ring structure. In the cavity two segments of Er^3＋ doped fiber and a fiber Bragg grating are used to improve pump efficiency. Tu...We present a novel and efficient L-band wavelength-tunable Er^3＋ doped fiber laser of ring structure. In the cavity two segments of Er^3＋ doped fiber and a fiber Bragg grating are used to improve pump efficiency. Tunable filters based on fiber loop mirrors are also applied inside the cavity to act as both a wavelength selector and a line-width compressor. Using these techniques, a tunable laser with tuning range up to 42 nm, output power larger than 1 mW, power uniformity controlled within 1.75 dB and side mode suppression ratio about 40 dB is achieved.展开更多
A novel four-wavelength all-fiber laser based on fiber Bragg gratings is presented.The four wavelengths are 1555.8,1556.6,1557.4 and 1558.2 nm,respectively.Each output laser is<0.3 nm in line-width and>1 mW in p...A novel four-wavelength all-fiber laser based on fiber Bragg gratings is presented.The four wavelengths are 1555.8,1556.6,1557.4 and 1558.2 nm,respectively.Each output laser is<0.3 nm in line-width and>1 mW in power.The suppression ratio between adjacent wavelengths is>30 dB.The laser was applied in a wavelength division multiplexing(WDM)system and the 100 km transmission of 1.2 Gb/s nonreturn-to-zero code,1.2 Gb/s return-to-zero code,2.5 GHz analogue signal and 5 GHz analogue signal was realized with it.展开更多
基金Supported by the National Natural Science Foundation of China under Grant No.69879001.
文摘A technique is used to enhance the pressure and temperature sensitivity of a fiber Bragg grating sensor.The grating is packaged by using polymer jacket,which exhibits no significant chirp due to the adoption of the special technique.The measured pressure and temperature sensitivity of the structured grating is 6.28×10^(-5)/MPa and5.18×10^(-5)/℃.The wavelength shift due to pressure and temperature can be enhanced about 31.5 times for pressure and 7.7 times for temperature.
基金This project(2005-28) is supported by Laboratory of Opto-elec-tronics Information Technical Science ,EMC.
文摘We present a novel and efficient L-band wavelength-tunable Er^3＋ doped fiber laser of ring structure. In the cavity two segments of Er^3＋ doped fiber and a fiber Bragg grating are used to improve pump efficiency. Tunable filters based on fiber loop mirrors are also applied inside the cavity to act as both a wavelength selector and a line-width compressor. Using these techniques, a tunable laser with tuning range up to 42 nm, output power larger than 1 mW, power uniformity controlled within 1.75 dB and side mode suppression ratio about 40 dB is achieved.
基金Supported by the National‘863’high technology project(863-307-15-5(11)).
文摘A novel four-wavelength all-fiber laser based on fiber Bragg gratings is presented.The four wavelengths are 1555.8,1556.6,1557.4 and 1558.2 nm,respectively.Each output laser is<0.3 nm in line-width and>1 mW in power.The suppression ratio between adjacent wavelengths is>30 dB.The laser was applied in a wavelength division multiplexing(WDM)system and the 100 km transmission of 1.2 Gb/s nonreturn-to-zero code,1.2 Gb/s return-to-zero code,2.5 GHz analogue signal and 5 GHz analogue signal was realized with it.
