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可调谐多波长布里渊掺铒光纤激光器将光纤中的SBS非线性放大同掺铒光纤的线性放大相结合得到室温稳定的多波长输出,具有波长间隔一致、线宽窄、功率谱相对平坦等优点。设计了一种基于光纤布拉格(FBG)反射的线性可调谐多波长布里渊掺铒光纤激光器。该线性腔激光器的一端利用光纤布拉格光栅作为反射镜,有效抑制了腔内自激模的影响,增加激光器输出波长数。布里渊泵浦信号进入布里渊增益介质之前经过掺铒光纤放大器的两次放大,降低了布里渊增益的阈值。该多波长激光器实现了1 530~1 560 nm之间30 nm可调谐范围的输出。在布里渊泵浦信号功率2 mW,980 nm泵源抽运功率60 mW情况下,1 540~1 554 nm范围内,获得了波长间隔0.088 nm的16个波长的输出。 相似文献
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C波段和980 nm抽运的两段级联L波段掺铒光纤放大器 总被引:5,自引:3,他引:2
提出了由C波段和传统的 980nmLD两段级联抽运L波段信号的结构 ,C波段的功率和波长由掺铒光纤激光器控制。从实验和理论上分析了注入不同波长和功率的C波段对其增益的影响。设计的掺铒光纤放大器(EDFA)结构 ,在C波段波长为 15 2 5nm ,注入功率为 5mW时 ,功率为 - 2 0dBm ,波长为 15 80nm的信号增益提高了 7 7dB。 相似文献
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本文利用国产半导体激光器泵浦掺Yb^3+光纤环形激光器获得成功,掺Yb^3+光纤长3m,与1053nm/980nm波分复用器(WDM)构成交叉耦合型全光纤环形腔,总腔长为4m,泵浦波长980nm,激光波长为1042.3nm斜率效率9.6%,激光阈值低于0.5mW,利用可调谐钛宝石激光器泵浦,得到该光纤激光器的最佳泵浦波长为978nm。 相似文献
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Bo-Hun Choi Hyo-Hoon Park Moo-Jung Chu 《Quantum Electronics, IEEE Journal of》2003,39(10):1272-1280
A long-wavelength-band erbium-doped fiber amplifier (L-band EDFA) using a pump wavelength source of 1540-nm band has been extensively investigated from a small single channel input signal to high-power wavelength division multiplexing (WDM) signals. The small-signal gain coefficient of 1545-nm pumping among the 1540-nm band is 2.25 times higher compared to the conventional 1480-nm pumping. This improvement in gain coefficient is not limited by the pumping direction. The cause for this high coefficient is explained by analyzing forward- and backward-amplified spontaneous emission spectra. The gain spectra as a function of a pump wavelength suggest that a broadband pump source as well as a single wavelength pump can be used as a 1540-nm-band pump. In the experiment for high-power WDM signals, the power conversion efficiency for 256 WDM channel input is 48.5% with 1545-nm pumping. This result shows more than 20% improvement compared with the previous highest value for the L-band EDFA. Finally, the 1545-nm bidirectionally pumped EDFA is applied as a second stage amplifier in an in-line amplifier of an optical communication link with a 1480-nm pumped first stage EDFA, in which the input power of the second-stage EDFA is +2.2 dBm. The power conversion efficiency yields a 38% improvement without noise figure degradation compared with the case of 1480-nm pumping. 相似文献
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一种高性能环形可调谐光纤光栅激光器研究 总被引:1,自引:0,他引:1
研制了一种新型的高性能环形可调谐光纤光栅激光器。该激光器使用980nm LD作为泵浦源,使用长度为10. 8m的新型增益平坦掺铒光纤作为增益介质,采用可调谐光纤光栅滤波器进行波长调谐,调谐范围可达41nm (1528nm~1569nm) ,中心波长可精确调谐到C波段指定的ITU - T标准中心波长处, 3dB 带宽< 0. 08nm, 25dB带宽< 0. 2nm,波长稳定性优于0. 01nm,边模抑制比> 60dB。最大输出功率46. 94mW,功率稳定性优于±0. 02dB,阈值泵浦功率7. 3mW,斜率效率为39. 75%。并分析了不同腔长、不同输出耦合比对输出功率的影响。 相似文献
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为了实现高效、全光纤化的2μm激光输出,采用中心波长为1569nm附近的级联双包层铒镱共掺光纤放大器来抽运铥钬共掺单模光纤、1550nm/2000nm波分复用器、光纤耦合器构成的环形腔全光纤激光器。当915nm LD抽运驱动电流为6.9A时,获得的最大输出激光功率为57.23mW,斜率效率约为12%,线宽约为4.5nm,阈值抽运功率约为180mW。结果表明,该光纤激光器性能可靠,其在光纤传感、激光医疗等领域将有巨大应用前景。 相似文献
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Double-pass forward and double-pass backward erbium-doped super-fluorescent fiber sources(EDSFSs) were combined in one configuration.A 980 nm laser diode pumped the same erbium-doped fiber from both directions using a coupler as a power splitter.The double-pass configuration was achieved by coating the fiber end face.Firstly,an optimal fiber length was found to obtain a high stability of output light wavelength with pump power, and then 1530/1550 nm wavelength division multiplexing was used for spectrum planarization,which expanded the bandwidth to more than 22 nm.The final step was a test of temperature stability.The results show that the rate of the central wavelength change kept to below 3.5 ppm/℃in the range of -40 to 60℃and 1-2 ppm/℃in the range of 20-30℃.Considering all the three factors of the fiber optic gyro applications,we selected 80 mA as the pump current,in which case the central wavelength temperature instability was calculated as 2.70 ppm/℃, 3 dB bandwidth 22.85 nm,spectral flatness 0.2 dB,output power 5.17 mW and power efficiency up to 9.92%.This experimental result has a significant reference value to the selection of devices and proper design of ED-SFSs for the application of high-precision fiber optic gyroscopes. 相似文献
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高功率被动锁模2.0μm掺铥飞秒脉冲光纤激光器 总被引:3,自引:1,他引:2
报道了高功率半导体可饱和吸收镜被动锁模的2.0μm掺铥飞秒脉冲光纤激光器的实验结果。该光纤激光器利用半导体可饱和吸收镜与宽带全反射镜来构成线型法布里-珀罗腔,自制的1550nm连续掺铒光纤激光器作为激光抽运源。当抽运功率为312mW时,开始得到稳定的重复频率为53MHz的锁模激光脉冲串。当抽运功率增加到472mW时,得到的最大平均输出功率为50mW,相应的最高单脉冲能量为0.94nJ;此时测得锁模激光脉冲的宽度为907fs,激光的中心波长为1939.5nm,3dB光谱带宽为4.6nm。 相似文献
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人眼安全的1550 nm全光纤单频脉冲激光器具有广泛且诱人的应用前景。本文所研制的激光器采用全光纤主振荡功率放大(MOPA)结构和腔外声光调制的方法,一级预放大级采用1.5 m单模保偏掺铒光纤,输出功率21.45 mW;二级预放大级采用1.5 m双包层保偏铒镱共掺光纤,输出功率253.6 mW;功率放大级采用1 m双包层保偏大芯径铒镱共掺光纤,泵浦功率15.9 W时,最终实现了输出功率2.6 W、脉宽260 ns、重复频率10 kHz的单频脉冲激光输出。通过对各级增益光纤和无源光纤的长度优化,成功抑制了放大自发辐射(ASE)和受激布里渊散射(SBS),消除了放大过程中噪声的影响,得到了峰值功率1 KW的稳定单频脉冲特性。 相似文献
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《Electronics letters》2008,44(18):1082-1083
A novel low-noise extended L-band silicate erbium-doped fibre amplifier (EDFA) is proposed, consisting of two novel gain-flattened gain blocks for wavelength-division multiplexing (WDM) signals from 1562.2 to 1619.6 nm. Each gain block consists of three isolated phosphorus/ alumina co-doped silicate EDFs, an intermediate embedded gain flattening filter (GFF), a short wavelength pump laser diode, and a pump bypass and/or a recycle path. The proposed EDFA, which uses only three pump laser diodes, has achieved noise figures as much as 6.1 dB lower than those realised by an earlier EDFA, when its intermediate optical attenuator has large signal losses and the input signal power is low. 相似文献
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Recent progress in long-distance in-Fiber Bragg Grating (FBG) sensor systems at University of Electronic Science & Technology of China (UESTC) is reviewed in this paper. Two novel approaches with a 50km transmission distance are proposed and demonstrated. The first one is based on the combination of bidirectional Raman amplification and a dual Erbium-Doped Fiber (EDF) configuration. A good Signal-to-Noise Ratio (SNR) of ~16dB is achieved with only a pump power of ~280 mW, which is ~10 dB higher than that without amplification. The second is based on a novel tunable fiber ring laser configuration with hybrid Raman/EDFA configuration. Experimental results show that an excellent optical SNR of-~60 dB has been achieved for a 50 km transmission distance with a low Raman pump power of ~170 mW and a low EDFA pump power of~40 mW at wavelength of 980 nm. It is anticipated that these long-distance FBG sensing systems could find important applications in health monitoring of large infra-structures, such as oil or gas pipelines, ultra-long bridges and tunnels, river banks, and so on. 相似文献
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合成了一种新型Er3+-Yb3+共掺配合物Er1.2Yb0.8(PBa)6(Phen)2,在有机溶剂环戊酮中有具良好的溶解性,Er3+离子在材料中的质量百分比掺杂浓度可达10.8%。这种配合物可以直接旋涂成膜,用原子力显微镜(AFM)测得配合物薄膜表面粗糙度为0.745nm。荧光发射谱的测试表明,配合物的荧光半高宽(FWHM)为60nm。以PMMA基片为衬底,制备了稀土掺杂全聚合物光波导放大器,且当泵浦光波长为980nm、功率为200mW和信号光功率为0.2mW时,在3.2cm长的样品中获得了2.7dB@1 535nm的相对增益。 相似文献