S-band gain flattened distributed fiber Raman amplifier with a bandwidth from 1 488 nm to 1 541 nm(53 nm in width),an averaged gain of 10 dB and a gain ripple of ±0.6 dB is obtained successfully,in which a single...S-band gain flattened distributed fiber Raman amplifier with a bandwidth from 1 488 nm to 1 541 nm(53 nm in width),an averaged gain of 10 dB and a gain ripple of ±0.6 dB is obtained successfully,in which a single-wavelength high power fiber Raman laser with wavelength of 1 427.2 nm is used as the pump and the chirped fiber Bragg grating is used as the gain flattening filter.Besides,filter wavelength division multiplexer(FWDM) is used as the multi-signal multiplexer and 1 427 nm/1 505 nm coarse wavelength division multiplexer(CWDM) is used as the pump-signal coupler.The gain media are G652 fiber of 50 km in length and dispersion compensation fiber(DCF) of 5 km in length.Moreover,the location arrangements of different type of fibers and the effect caused by gain flattening filter as well as their solutions are discussed in detail.It is very significant to extend the range of optical fiber communication band and increase the capacity of fiber communication especially for ultra-long haul and ultra-high capacity communication system.展开更多
A 31 km long range distributed optical fiber Raman photon temperature sensor (DOFRPTS) system have been developed based on temperature effect of the amplified spontaneous Raman scattering in fiber, and using fiber las...A 31 km long range distributed optical fiber Raman photon temperature sensor (DOFRPTS) system have been developed based on temperature effect of the amplified spontaneous Raman scattering in fiber, and using fiber laser as a pumped source. The results show that temperature measuring uncertainty is ±2 °C, temperature resolution is 0.1 °C, measurement time is 432 s, spatial resolution is less than 4 m.展开更多
Amplification effect of forward stimulated Brillouin scattering (SBS) lines on the forward pumped s-band discrete DCF fiber Raman amplifier (FRA) has been studied.Pump threshold power of the forward first order Stokes...Amplification effect of forward stimulated Brillouin scattering (SBS) lines on the forward pumped s-band discrete DCF fiber Raman amplifier (FRA) has been studied.Pump threshold power of the forward first order Stokes SBS (FSB1- ),second order Stokes SBS (FSB2-) and third order SBS (FSB3-) in the forward pumped FRA are 1.5 mW,1.4 mW and 1.7 mW,respectively.The Stokes SBS lines are amplified by FRA and fiber Brillouin amplifier (FBA) at the same time.Gain of amplification is given as G_A=G_R·G_B,where G_R is Raman gain and G_B is Brillouin gain.Saturation gain of FSB1-,FSB2- and FSB3- are about 52 dB,65 dB and 65 dB,respectively.The saturation Raman gain of 10 km DCF forward FRA is about 14 dB,so Brillouin gain of FSB1-,FSB2- and FSB3- are about 38 dB,51 dB and 51 dB,respectively.The forward cascaded SBS lines have been observed.展开更多
An S band and a C band distributed fiber Raman amplifiers (DFRAs) with flattened gain and compensated dispersion have been studied and implemented with 1427 nm and 1455 nm mono-wavelength fiber Raman lasers as the pum...An S band and a C band distributed fiber Raman amplifiers (DFRAs) with flattened gain and compensated dispersion have been studied and implemented with 1427 nm and 1455 nm mono-wavelength fiber Raman lasers as the pumped sourcesrespectively. The gain of single-wave pumped S band and C band can reach 10 dB and 15 dB respectively. And a 50 nmgain flattened width was successfully obtained by using a chirp fiber Bragg grating (CFBG) gain flattened filter with gainripple of ±0.6 dB. The C band DFRA has been applied to CDMA wireless communication system successfully.展开更多
基金This work was supported bythe Great Scientific Research Projectof Zhejiang Province ,P.R.China (No.021101558)the Min-istry of Science and Technology ,Korea as a part of project fundsof the Korea-China Optical Technology Research Center .
文摘S-band gain flattened distributed fiber Raman amplifier with a bandwidth from 1 488 nm to 1 541 nm(53 nm in width),an averaged gain of 10 dB and a gain ripple of ±0.6 dB is obtained successfully,in which a single-wavelength high power fiber Raman laser with wavelength of 1 427.2 nm is used as the pump and the chirped fiber Bragg grating is used as the gain flattening filter.Besides,filter wavelength division multiplexer(FWDM) is used as the multi-signal multiplexer and 1 427 nm/1 505 nm coarse wavelength division multiplexer(CWDM) is used as the pump-signal coupler.The gain media are G652 fiber of 50 km in length and dispersion compensation fiber(DCF) of 5 km in length.Moreover,the location arrangements of different type of fibers and the effect caused by gain flattening filter as well as their solutions are discussed in detail.It is very significant to extend the range of optical fiber communication band and increase the capacity of fiber communication especially for ultra-long haul and ultra-high capacity communication system.
基金supported by Great Scientific Research Project ofZhejiang Province, China (No.011101081)as a part of projectfunds of the Korea-China Optical Technology Research Center
文摘A 31 km long range distributed optical fiber Raman photon temperature sensor (DOFRPTS) system have been developed based on temperature effect of the amplified spontaneous Raman scattering in fiber, and using fiber laser as a pumped source. The results show that temperature measuring uncertainty is ±2 °C, temperature resolution is 0.1 °C, measurement time is 432 s, spatial resolution is less than 4 m.
基金Supported by the Great Scientific Research Project of ZhejiangProvince ,P.R.China under Grant No.021101558
文摘Amplification effect of forward stimulated Brillouin scattering (SBS) lines on the forward pumped s-band discrete DCF fiber Raman amplifier (FRA) has been studied.Pump threshold power of the forward first order Stokes SBS (FSB1- ),second order Stokes SBS (FSB2-) and third order SBS (FSB3-) in the forward pumped FRA are 1.5 mW,1.4 mW and 1.7 mW,respectively.The Stokes SBS lines are amplified by FRA and fiber Brillouin amplifier (FBA) at the same time.Gain of amplification is given as G_A=G_R·G_B,where G_R is Raman gain and G_B is Brillouin gain.Saturation gain of FSB1-,FSB2- and FSB3- are about 52 dB,65 dB and 65 dB,respectively.The saturation Raman gain of 10 km DCF forward FRA is about 14 dB,so Brillouin gain of FSB1-,FSB2- and FSB3- are about 38 dB,51 dB and 51 dB,respectively.The forward cascaded SBS lines have been observed.
基金This work was supported by Great Scientific Research Project ofZhejiang Province, China (No.021101558)a part of projectfunds of the Korea-China Optical Technology Research Center.
文摘An S band and a C band distributed fiber Raman amplifiers (DFRAs) with flattened gain and compensated dispersion have been studied and implemented with 1427 nm and 1455 nm mono-wavelength fiber Raman lasers as the pumped sourcesrespectively. The gain of single-wave pumped S band and C band can reach 10 dB and 15 dB respectively. And a 50 nmgain flattened width was successfully obtained by using a chirp fiber Bragg grating (CFBG) gain flattened filter with gainripple of ±0.6 dB. The C band DFRA has been applied to CDMA wireless communication system successfully.
