共查询到20条相似文献,搜索用时 46 毫秒
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利用三个2×2的光纤耦合器按一定规则联接成一个全光纤耦合环,该耦合环将三个独立的掺铒光纤激光器连成一个锁相阵列. 由于耦合环的引入,锁相阵列的整体损耗减小,且三个单元激光器之间可以进行有效的能量相互注入耦合,进而实现阵列的锁相输出. 实验中观察到的远场干涉图样和锁相前后的输出光谱均表明三路光纤激光器实现了相位锁定,当三路抽运源的功率均为100 mW时,获得了92 mW的稳定相干输出.
关键词:
光纤激光器
相干合成
光纤耦合器
相位锁定 相似文献
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报道用971nm半导体激光器泵浦的掺铒光纤激光器的一些实验研究结果。演示了由光纤环反射器和光纤光栅构成的全光纤色散掺铒光纤激光器,在1.55μm波段获得了线宽小于0.05nm的激光输出。 相似文献
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抑制相位噪声实现主动锁模光纤激光器稳定工作 总被引:6,自引:0,他引:6
腔长漂移是引起主动锁模光纤激光器不稳定的一个主要原因。通过理论分析得出了主动锁模光纤激光器输出脉冲相位噪声和腔长漂移的关系,并采用抑制相位噪声的方法实现了主动锁模光纤激光器长达8小时的稳定工作。 相似文献
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Chun-can Wang Ling-xian Gong Jue-ling Li Fan Zhang Shui-sheng Jian 《Optics Communications》2011,284(18):4215-3941
Two passive cores with elliptical air holes are introduced in the cladding of the active multicore fiber. The birefringence induced by the elliptical air holes lifts the degeneracy between two orthogonal in-phase supermodes, through the coupling between the passive and the active cores. For the proposed multicore fiber with an appropriate choice of the design parameters, the x-polarized in-phase supermode has more mode power in the active cores compared with the other supermodes. That in turn favors competition compared to the other supermodes with the low power density in the active cores. The numerical results show that the multicore fiber lasers can output a pure x-polarized in-phase supermode without using other mode-selective elements. 相似文献
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Li L Schülzgen A Chen S Temyanko VL Moloney JV Peyghambarian N 《Optics letters》2006,31(17):2577-2579
We report a compact multicore fiber laser that utilizes an all-fiber approach for phase locking and in-phase supermode selection. By splicing passive coreless fibers of controlled lengths to both ends of an active 19-core fiber, we demonstrate that the fundamental in-phase supermode can be selectively excited with a completely monolithic fiber device, instead of conventional free-space and bulk optics, to achieve phase-locked operation for a multiemitter laser device. 相似文献
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The in-phase mode selection of a high-power diode laser array by a talbot cavity with an amplitude compensator 总被引:2,自引:0,他引:2
The in-phase mode selection with the amplitude compensator at a high current (I > 20 A) was analyzed theoretically and achieved experimentally in an external Talbot cavity, of length L = ZT/4. The used linear array consisted of 49 wide-aperture diodes with a diode emitter aperture a = 100 μm and a center to center period d = 200 μm. Increasing the output radiation intensity in the far-field central lobe was demonstrated, and the power of the multi-lobes was 1.57 W without the amplitude compensator and then it concentrated on the single lobe was 0.96 W by inserting the amplitude compensator in the external cavity when the injection current was 25 A. The far-field divergence of the phase locked radiation was 1.80 mrad, and the spectral FWHM of the output radiation was suppressed from 1.7 nm to 0.15 nm. 相似文献
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B. M. Shalaby V. Kermene D. Pagnoux A. Desfarges-Berthelemot A. Barthélémy 《Applied physics. B, Lasers and optics》2011,105(2):213-217
We report on a fiber laser configuration, emitting two phase-locked and single mode beams at the output of two multicore fibers.
The passive technique is based both on the selective excitation of the only in-phase supermodes of the multicore fibers and
on an intra-cavity angular filtering of the emitted beams to provide phase control. As a proof of principle, we experimentally
demonstrate the coherent combining of the fundamental in-phase supermodes of two parallel 7-cores fibers. 相似文献
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本文基于多横模运转的传输速率方程,建立了多芯光子晶体光纤放大器的数值模型.利用分步傅里叶方法,分析了掺杂浓度分布、耦合强度、抽运功率对于放大器各模式输出功率的影响.通过对多芯光子晶体光纤掺杂浓度的阶梯设计和纤芯间耦合强度的优化,实现了无需插入其他外加元件,利用光纤本身特性就可以实现选定同相位超模的方法,并且数值计算表明高抽运功率也能够提高放大器输出同相位超模的比例,进一步优化了多芯光子晶体光纤放大器输出脉冲的光束质量. 相似文献
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We have developed models to investigate the power properties of monolithic fiber laser with master oscillator multi-stage power amplifiers configuration. In the simulation the effect of optical characteristics of fiber fusion splice was considered, which was introduced by connecting fiber amplifiers. The theoretical modeling was established based on the classic theory of rate equations and the computational method was described in detail. On the basis of three high-power fiber lasers with different structures, we analyzed the splice loss and return loss, and how they influence the distribution of laser power in the system. The results showed that, on the present splicing level, both the enhancement of the pump capacity of fiber laser and the reduction of the quantity of power amplifier modules were effective strategies to accomplish fiber laser with tens of thousands of watts output. 相似文献
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讨论了光纤光栅法布里-珀罗(F-P)标准具选模光纤激光器的单频运转原理,并研制了全光纤结构单频掺Er3+光纤环形激光器。实验中采用两个976 nm激光二极管双向泵浦作为泵浦源,高掺杂浓度掺Er3+光纤作为增益介质,以行波腔消除空间烧孔效应,利用光纤光栅F-P标准具窄带选模特性,当泵浦光功率为36 mW时,得到了稳定的单频激光输出。实验中使用了长5和3 m的掺杂光纤,在泵浦光功率为145 mW时输出功率分别为19和42 mW,光-光转换效率分别为13%和29%,斜率效率分别达到了16%和33%。输出谱线3 dB带宽0.01 nm,无跳模现象。 相似文献
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In order to improve the performance of the double-clad fiber laser, the optimum laser length needs to be estimated prior to the experiment. Previous expressions for the optimum length of fiber laser have been established under some assumptions, such as the output power without laser scattering loss and the pump power without reflection in the output-end. In this work, the issue of optimum laser length has been analyzed theoretically based on the strongly pumped fiber laser model. An extended expression for the optimum length of the linear cavity Yb3+-doped double-clad fiber laser is obtained. The respective effects of the laser scattering loss, the pump power, the Yb3+ dopant concentration, and the pump reflection on the optimum laser length are identified. 相似文献
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An erbium-doped fiber laser (EDFL) constructed in a master oscillator and power amplifier (MOPA) configuration is analyzed. The pump powers for the fiber cavity laser and the booster amplifier stages are managed properly to achieve maximal pump conversion efficiency. Our design achieves a pump conversion efficiency of 91.4%, corresponding to a quantum efficiency of 96.6%, for a 1565.8 nm MOPA laser pumped by a total power of 300 mW at 1480 nm. The optimized MOPA laser shows a 25% enhancement in the pump conversion efficiency, compared to a non-MOPA fiber laser. A side lobe suppression ratio of 48 dB for the optimized MOPA laser is observed. 相似文献