共查询到18条相似文献,搜索用时 46 毫秒
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基于双程反向结构的掺铒超荧光光纤光源 总被引:2,自引:0,他引:2
给出双程反向结构掺铒超荧光光源的理论分析模型。研制了一种采用双程反向结构,980nm激光二极管泵浦的掺铒超荧光光纤光源。在波长1550nm处,获得了光谱稳定、输出功率大的超荧光。光谱3dB带宽为55nm,并有20nm的ASE光谱平坦区。 相似文献
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双程后向结构铒光纤超荧光光源的理论分析 总被引:4,自引:0,他引:4
本文数值模拟了掺铒光纤超荧光光源的物理过程,对单程前向/后向结构光源的理论与实验结果进行了比较,两者达到了很好的符合,包括在输出信号频谱分布上,文中给出了有关双程后向结构光源特性的理论分析,首次表明,通过优化反射镜参数,在稳定的前提下,双程后向结构光源具有优于其他结构光纤光源的频带宽和泵浦率。 相似文献
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宽带掺铒光纤超荧光光源 总被引:4,自引:0,他引:4
详细探讨了单程前向、单程后向、双程前向、双程后向等几种典型的掺饵光纤超荧光光源结构,介绍了超荧光光源的研究进展,报道了我们研制的双程后向结构超荧光光源。 相似文献
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优化设计了高功率、高效率掺铒光纤超荧光光源的参数。采用商用掺铒光纤,针对双程后向结构,首先仿真了光源输出功率和带宽随掺铒光纤长度的变化,并用对等实验验证了模拟结果,初步确定掺铒光纤长度的优化范围;理论研究了反射镜反射率对光源性能的影响,计算出最佳反射率并模拟了该反射率下光源的输出光谱;实验研究了抽运功率对光源平均波长的影响,确定了优化的抽运功率范围,并进一步确定了掺铒光纤的优化长度。实验选用110mW抽运功率,13.74m掺铒光纤,获得了输出功率为46.9mW的高功率光纤光源,其抽运转换效率可达42.6%,且光源保持了约34.54nm的宽带宽。 相似文献
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宽带、高稳定掺铒光纤超荧光光源 总被引:2,自引:0,他引:2
概述了掺铒光纤超荧光光源的基本原理、主要结构和特点;介绍超荧光光源的最新研究进展,报道我们研制的中心波长稳定的L波段超荧光宽带光源和单级掺铒光纤C L波段超荧光宽带光源。 相似文献
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Characteristics comparison of Er-doped double-pass superfluorescent fiber sources pumped near 980 nm 总被引:11,自引:0,他引:11
L.A. Wang C.D. Chen 《Photonics Technology Letters, IEEE》1997,9(4):446-448
The Er-doped superfluorescent fiber sources (SFS's) pumped near 980 mm in double-pass forward and backward configurations are compared for the first time. The results indicate that a double-pass backward SFS is superior to the forward counterpart in many aspects: higher output power at various lengths of erbium-doped fiber, better pump-power dependent mean wavelength stability, and larger linewidths at various fiber mirror reflectance. 相似文献
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A new type of high-power broadband superfluorescent source of Yb^3+ -doped double-cladding photonic crystal fiber is reported experimentally, which is pumped at 976 nm by a high-power laser diode with the end-coupling method. We have obtained a smooth broadband output of superfluorescence The maximum output power is 1.649 W with a slope efficiency of 56.7%. The 3 dB bandwidth is 22.4 nm To the best of our knowledge, this is the first report about SFS with such high output power of 1.649 W. 相似文献
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We demonstrate a new technique to generate a high-power multiwavelength fiber source (MWFS) by inserting cascaded long-period fiber gratings (LPFGs) in double-pass Er-doped fiber (EDF) superfluorescent fiber sources. 20 channels with extinction ratios larger than 10 dB can be obtained between 1525-1560 nm with appropriate EDF lengths. Though the total output power decreases due to the insertion of the cascaded LPFGs, the power in each channel for the proposed MWFS is larger than that obtained by using the spectrum slicing technique because of power redistribution. We also demonstrate that by using another LPFG in such a source to reduce the power variation among the desired channels. The wavelength stability of the source is shown to be determined by the cascaded LPFCs rather than by the EDF 相似文献
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We first demonstrate that by inserting an appropriate long period grating in an Er-doped superfluorescent fiber source (SFS) of double-pass backward (DPB) configuration, the output spectrum can be broadened up to 40 nm. The characteristics of a long period grating (LPG) are then shown to have marked effects on the properties of the SFS. Both measured and simulated results agree well in the trend. The spectrum broadening using an LPG is shown effective over a large pump power range, especially for a single-humped DPB SFS. After the analysis of three types of output spectra, the tolerances of LPG's characteristics are found larger for a single-humped DPB SFS having the dominant band in 1558 nm 相似文献
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Wysocki P.F. Digonnet M.J.F. Kim B.Y. Shaw H.J. 《Lightwave Technology, Journal of》1994,12(3):550-567
The characteristics of 1.55 μm Er-doped superfluorescent fiber sources (SFS's), intended for fiber-optic gyroscope (FOG) applications, are explored theoretically and experimentally. With proper selection of the source configuration, fiber length, pump wavelength, pump power, and fiber composition, we show that it is possible to meet the stringent requirements of the FOG, including a high output power, broad emission bandwidth, and excellent spectral thermal stability. Variations of the mean wavelength, spectral width, and output power of the SFS with fiber length, pump power, pump wavelength, and temperature are modeled for representative sources pumped near 980 nm or 1.48 μm, and are shown to be in good agreement with experimental results. The effects of a multimoded pump, erbium ion pair, and optical feedback are also assessed. This study indicates that the Er-doped SFS is an excellent candidate for the FOG and for other applications requiring spatial coherence and low temporal coherence 相似文献
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Anomalous dispersion in photonic crystal fiber 总被引:13,自引:0,他引:13
Knight J.C. Arriaga J. Birks T.A. Ortigosa-Blanch A. Wadsworth W.J. Russell P.St.J. 《Photonics Technology Letters, IEEE》2000,12(7):807-809
We describe the measured group-velocity dispersion characteristics of several air-silica photonic crystal fibers with anomalous group-velocity dispersion at visible and near-infrared wavelengths. The values measured over a broad spectral range are compared to those predicted for an isolated strand of silica surrounded by air. We demonstrate a strictly single-mode fiber which has zero dispersion at a wavelength of 700 mm. These fibers are significant for the generation of solitons and supercontinua using ultrashort pulse sources 相似文献