共查询到19条相似文献,搜索用时 93 毫秒
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全光纤通信系统中的偏振激光器 总被引:1,自引:0,他引:1
报道了一种简单、实用的解决全光通信中的光源偏振问题的方法,并通过实验对偏振环形腔光纤激光器与没有偏振措施的普通环形腔激光器进行了比较,观察到了清晰的眼图. 相似文献
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提出并实验研究了一种2μm波段全光纤间隔可调双波长光纤激光器.该激光器采用传统的环形腔设计,以最大输出功率33dBm的1 565nm光纤激光器为泵浦源,4m单模掺铥光纤为增益介质,腔内为嵌入多模干涉滤波器的Sagnac环的复合滤波结构.该复合滤波器可实现间隔可调谐,高边模抑制比的双波长激光信号输出.通过泵浦功率的控制和对复合滤波器中偏振控制器的调节,实现双波长3nm到80nm间隔可调的激光输出,边模抑制比为60dB,线宽为0.2nm,功率稳定度为±1.5dB/h,双峰能量差小于4dB. 相似文献
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提出一种简单的理论模型,并通过数值模拟详细研究了可调谐光纤环形腔激光器的输出特性随掺铒光纤长度、输出耦合比、抽运功率、腔内损耗等参量的变化关系.理论分析得到,通过参量优化可以实现在铒离子增益范围内超过130nm带宽(1500—1630nm)的激光输出.实验获得了100nm带宽(15185—16185nm)的可调谐激光输出,激光器输出功率高,信噪比在大部分可调范围内高于60dB,实验结果与理论分析符合得较好
关键词:
掺铒光纤
光纤环形腔激光器
可调谐
光纤珐布里珀罗滤波器 相似文献
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为提高光纤激光器无源自调整相干合成阵列的效率、稳定性和可扩展性,提出了基于公共光纤环形腔耦合与单模光纤滤波的光纤激光器相干合成方案。将多个2×2的光纤耦合器分别插入各单元激光器的谐振腔,利用耦合器余下的端口,两两相连构成公共环形耦合腔。采用单模光纤滤波技术,提高了各输出激光束之间相位锁定的稳定性。利用该方案在实验上实现了三路光纤激光器的被动锁相输出,实验测得的远场干涉光斑、输出功率及光谱均表明该方案适于构建性能较好的光纤激光器相干合成阵列。 相似文献
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Using a fiber Bragg grating (FBG) and a Fabry-Perot cavity composed of two fiber Bragg gratings (FBGFP) as its frequency-selective components, a type of single frequency all-fiber ring laser permits oscillation only on one longitudinal mode of the main cavity without modehopping while the cavity length can be up to tens of meters. The salient feature is due to the single narrowband resonance of the FBGFP filter. Such a fiber ring laser is achieved experimentally, and the laser mode is limited inside the single resonance of the FBGFP. 相似文献
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Single-longitudinal-mode fiber ring laser using fiber grating-based Fabry-Perot filters and variable saturable absorbers 总被引:1,自引:0,他引:1
A single-longitudinal-mode (SLM) fiber ring laser is demonstrated by incorporating a fiber Bragg grating (FBG)-based Fabry-Perot (F-P) filter and a variable saturable absorber in a fiber ring cavity. An ultra-narrow bandpass filter is established by the combined mode filtering of the FBG-based F-P filter and the variable saturable absorber. No accurate control for cavity length is required, and stable single longitudinal-mode operation without mode hopping is conveniently achieved. 相似文献
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A simple unidirectional optically stable ring laser cavity has been developed for short pulse excitation. Using only one grazing incidence grating as a selective element a N2-laser pumped dye laser has been constructed having a single mode spectrum of 420 MHz, clockwise to counterclockwise wave ratio 166:1 and a conversion efficiency of 4.6%. 相似文献
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Switchable dual-wavelength Erbium-doped fiber ring laser with cascaded fiber Bragg gratings 总被引:1,自引:0,他引:1
Jae-Ho Han 《Optik》2010,121(24):2266-2268
We have experimentally shown wavelength mode switching in a dual-wavelength Erbium-doped single cavity fiber laser where the initial two wavelengths of 1 nm spacing are determined by the cascaded reflection type short-period fiber Bragg gratings having two different centre wavelengths of 1550.5 and 1551.5 nm. The lasing mode depends on the polarization in the ring cavity to migrate from one wavelength to another or operates in both modes in a polarization beam splitter output. To effectively control the polarization in the ring cavity, the polarization controllers were positioned before and after the polarization beam splitter. This method of wavelength switching provides a simple way of mode tuning in dual-wavelength fiber lasers. 相似文献
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从理论上设计并从实验上实现了一种简单易行的环形谐振腔结构,它仅由两个耦合器连接成一个环形谐振腔,可以使得逆时针运行光的增益高于顺时针运行光的增益,其比值取决于两个耦合器耦合比的选取。将此作为掺铒光纤激光器的谐振腔,由于两个相反方向具有不同的损耗,因而可以实现在不需要隔离器的情况下也能保证激光的单向运行,从而简化了器件结构,消除隔离器的插入损耗,降低了成本。在实验的过程中使用两个3dB耦合器,结果表明,在阈值及其以上抽运功率下,两个相反方向的输出功率差始终大于17dBm,基本实现了激光的单向运行。 相似文献
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Dong J. L. Luo Z. C. Xu W. C. Luo A. P. Wang L. Y. Cao W. J. Wang H. Y. 《Laser Physics》2011,21(6):1111-1114
We propose and demonstrate a simple but efficient way to generate low repetition rate pulses in an erbium-doped fiber ring
laser by using self-pulsing technique. About 2.25 km long single mode fiber is used to elongate in the cavity, providing large
anomalous cavity dispersion in the wavelength region around 1550 nm. Self pulses at a repetition rate of 85.3 kHz with single
pulse energy as high as 110 nJ are efficiently obtained on the nanosecond time scale. The experimental results demonstrate
that the self-pulse fiber laser operating in the anomalous dispersion regime can also realize high-energy pulses at a very
low pulse repetition rate. 相似文献