共查询到20条相似文献,搜索用时 78 毫秒
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侧面抽运的掺Yb双包层光纤激光器 总被引:2,自引:0,他引:2
利用光纤角度磨抛侧面耦合新技术研究了侧面抽运的掺Yb双包层光纤激光器。实验上采取新的加工工艺获得了端面具有小锐角磨抛斜角的多模光纤,专门设计的高精密机械调整结构有效地将多模光纤的斜面和双包层光纤的侧面精确对准,通过不同的折射率匹配材料进行的研究,发现折射率匹配材料对于注入功率和抽运效率都有较大影响。实验中通过光纤角度侧面耦合器能够注入1.12W抽运光进入双包层光纤,侧面耦合效率最高可达80%。将该侧面耦合技术用于侧面抽运的掺Yb双包层光纤激光器,在单个尾纤输出的半导体激光器侧面抽运下得到光纤激光器的最大连续激光输出功率282mW,斜率效率为55.5%。实验结果表明,光纤角度磨抛耦合技术是掺Yb双包层光纤激光器的一种简单有效的侧面抽运方式。 相似文献
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双包层光纤光栅选频双包层光纤激光器 总被引:5,自引:2,他引:5
双包层光纤激光器中多采用法布里珀罗(F-P)线形腔结构,谐振腔为一只二向色镜和光纤端面菲涅耳反射镜(反射率约为4%)构成,这属于一种有缺陷的腔结构,其稳定性不好,产生激光的波长很难得到有效控制,后腔镜不能精确选择激光器的输出波长,激光器的输出谱线较宽。在某些对激光波长有明确要求的应用中,该结构会受到限制。采用布拉格光纤光栅作腔镜,利用其窄带滤波特性,可以得到窄线宽的激光输出,目前报道的作为腔镜的布拉格光纤光栅为在单包层光敏光纤上制作而成,然后分别将不同反射率的光纤光栅与双包层增益光纤熔接,这给腔镜与双包层光纤之间带来很大的耦合损耗,影响了激光器的功率输出。该文报道了用相位掩模法在双包层光纤芯上写入了布拉格光纤光栅,并把此光纤光栅做为后腔镜.对长度为10m、20m的D形掺Yb^3 双包层光纤激光器进行实验研究,在1058nm附近得到稳定的窄线宽激光输出,3dB带宽为0.329nm。激光器最大输出功率为570mW。最后对实验结果进行了理论分析。 相似文献
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建立了侧面抽运掺Yb3+双包层光纤激光器的数值模型,推导出激光分布的近似解析式,并进行了数值模拟,得到了光纤内抽运光和激光功率的分布特性,以及激光输出功率随抽运光注入位置,光纤长度以及端镜反射率的变化关系.结果表明,抽运光注入位置对激光分布和激光输出功率有较大的影响. 相似文献
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Luis A. Zenteno 《Optical Review》1995,2(1):52-54
Pumping of a rare-earth-doped double-clad fiber laser with a GaAIAs laser diode bar requires imaging the near field output of a 1 cm long one-dimensional linear array of tens of multi-mode laser diode sources onto a two-dimensional oblong cross section approximately matching the fiber’s first cladding shape. This work describes the design and preliminary implementation of a device (here called a high brightness geometric transformer) that achieves this transformation with minimum brightness loss. This is done by imaging the laser diode bar near field using a fast cylindrical micro-lens onto a linear array of N (≈10) soft-glass, thin-clad rectangular fibers; in turn, the fibers’ output ends are arranged to form a stack that matches the required first cladding shape. For a typical 20W CW, laser diode bar with brightness of 25 mW·μm2·sr-1, the geometric transformer output brightness is 0.6 mW·μm-2·sr−1, i.e., there is a ·40 intermediate loss of brightness. If the output of the geometric transformer is used to pump a Nd-doped double-clad fiber laser, an overall brightness gain of ·340 can be achieved.Presented at the International Commission of Optics Topical Meeting, Kyoto, 1994. 相似文献
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对主振荡功率放大器(MOPA)方式脉冲抽运双包层掺镱脉冲光纤放大器进行了理论研究,分析了放大中抽运脉冲、激光脉冲和拉曼斯托克斯光脉冲的相互作用过程.对增益光纤中上能级粒子数密度随抽运时间的变化进行了分析,求出了最佳抽运脉冲宽度.随着抽运功率的增加,放大过程中出现的受激拉曼效应(SRS)将抑制激光脉冲能量的增加,当采用最佳抽运功率时激光脉冲的能量可达到最大值.分析了光纤长度、纤芯直径对最佳抽运功率、激光脉冲和一级斯托克斯光脉冲的影响.结果表明,当最佳抽运功率时,采用纤芯较粗、长度较短的增益光纤,可以抑制受激拉曼效应,提高激光脉冲的能量与峰值功率. 相似文献
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Wideband All-Polarization-Maintaining Yb-Doped Mode-Locked Fiber Laser Using a Nonlinear Optical Loop Mirror 下载免费PDF全文
《中国物理快报》2016,(5)
We report on a wide-band and stable mode-locked all-polarization-maintaining fiber iaser configuration using a noniinear optical loop mirror.The central wavelength of the laser is 1080.14 nm and the 3dB bandwidth is 20.29 nm.The repetition rate of the pulse is 3.28 MHz and the pulse width is 848 ps.By tuning the pump power,which is centered at 980 nm,from 300 mW to 380 mW,we obtain a linearly changed output power from 6mW to 7.12 mW.The all-polarization-maintaining fiber configuration is fundamental to the stability of the output power. 相似文献
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双包层光纤激光器微棱镜反射式侧面耦合的新技术 总被引:1,自引:0,他引:1
提出了一种双包层光纤激光器侧面耦合技术--微棱镜反射式侧面耦合技术,能高效且方便地将半导体激光器,特别是高功率半导体激光器阵列和叠层的抽运光耦合进双包层光纤中.该技术具有结构简单、加工难度小,抽运效率高、对光纤本身无损伤等特点,更重要的是该技术非常适合半导体激光器列阵的多点抽运.详细阐述了微棱镜反射式耦合技术的基本原理和具体使用方法,理论计算所得耦合效率超过90%,并进行了初步的实验研究,得到了超过50%的耦合效率.通过分析,对光源和棱镜具体尺寸参数提出了具体要求,并指出了其应用范围. 相似文献
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Stimulated Brillouin Scattering Enhancement Factor Improvement in a 11.6-GHz-Linewidth 1.5-kW Yb-Doped Fiber Amplifier 下载免费PDF全文
《中国物理快报》2016,(7)
The stimulated Brillouin scattering(SBS) threshold enhancement factor in a pure white noise linewidth broadening Yb-doped fiber amplifier(YDFA) with a short large mode area fiber is theoretically and experimentally studied.We demonstrate a 1064.08 nm,11.6 GHz linewidth,1.5kW output power YDFA with an SBS threshold enhancement of ~57(26 W SBS threshold with single frequency seed).The output beam is near-diffraction limited with a beam quality factor of M~2 = 1.15 and a slope efficiency of up to 87%.No SBS or stimulated Raman scattering effects are observed in the whole power range.Further power scaling is limited by the available pump power in our system. 相似文献
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Wang Yunkai Geng Kaiwen Chen Tao Ren Yuhu Peng Feng Zhang Haikun Xia Wei 《Journal of Russian Laser Research》2022,43(2):201-208
Journal of Russian Laser Research - We experimentally demonstrate the generation of a flat broadband optical pulse in an Er/Yb co-doped double-clad fiber laser based on the nonlinear polarization... 相似文献
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The Yb3+-doped double-clad fibers with novel inner cladding have been made by using MCVD process, solution-doping method and optical machining together. The laser power and slope efficiency of the fiber lasers are higher than 1.8W and 50% respectively. 相似文献
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M. O. Kaptakov V. I. Revenko M. E. Kustov I. S. Kurchatov V. V. Skroznikova T. B. Kiseleva V. V. Buchanov E. N. Murav’ev M. A. Kazaryan E. A. Kuznetsova E. F. Solinov V. I. Skachkov 《Bulletin of the Lebedev Physics Institute》2018,45(9):272-278
Some principal aspects of silicate glass cutting by controlled laser through thermal cleavage are considered. In particular, it is shown that the cutting speed in the case of ytterbium fiber laser radiation with a wavelength of 1.065 μm lying in fact in the glass transmission range (more precisely, in the low absorption region) depends linearly on the laser power. It is shown that the glass end face takes various geometrical shapes under various conditions of bulk heating and cooling. Therefore, to obtain a homogeneous end face, it is required to stabilize both the laser radiation power and the laser beam speed at a corresponding laser beam geometry in the cut region. Methods for obtaining various cross section shapes of the glass end face and methods for obtaining blunt edges of end faces are presented. 相似文献
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Operation of a CH3F laser at 496μ has been obtained in a hemispherical optical cavity pumped by up to 42 J of 9.55μ CO2 TEA laser radiation. Highly modulated 1μ pulses delivering 6 mJ at peak powers greater than 10 kW have been recorded. 相似文献
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SM Redmond DJ Ripin CX Yu SJ Augst TY Fan PA Thielen JE Rothenberg GD Goodno 《Optics letters》2012,37(14):2832-2834
Five 500 W fiber amplifiers were coherently combined using a diffractive optical element combiner, generating a 1.93 kW beam whose M(2)=1.1 beam quality exceeded that of the inputs. Combining efficiency near 90% at low powers degraded to 79% at full power owing to thermal expansion of the fiber tip array. 相似文献