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用于相干合成大模面积光纤放大器的实验研究 总被引:1,自引:1,他引:0
报道了一种用于激光束相干合成的大模面积掺镱双包层光纤放大器的实验研究,采用后向抽运的方式,放大器输出功率为1.61 W,放大后信号光的3 dB线宽为0.027 nm,并保持了输入信号光的优良光谱特性.从实验上深入研究了在该种放大器中,剩余抽运光功率、前向输出功率、后向输出功率等随抽运功率变化的规律.实验研究的目标是探索相干合成的方法,所设计的输出激光束线宽既保证了足够的相干长度,同时又能有效抑制受激布里渊散射. 相似文献
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A passive Q-switched large-mode-area Yb-doped fibre laser is demonstrated using a GaAs wafer as the saturable absorber. A high Yb doping concentration double-clad fibre with a core diameter of 30μm and a numerical aperture of 0.07 is used to increase the laser gain volume, permitting greater energy storage and higher output power than conventional fibres. The maximum average output power is 7.2W at 1080nm wavelength, with the shortest pulse duration of 580ns and the highest peak power of 161W when the laser is pumped with a 25W diode laser operating at 976nm. The repetition rate increases with the pump power linearly and the highest repetition rate of 77kHz is obtained in the experiment. 相似文献
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Realization of Stable Narrow Linewidth Dual-Wavelength Lasing in an Erbium-Doped Fibre Laser by Cleaving the Wavelength-Selective Filter Spectrum 下载免费PDF全文
We propose and demonstrate a new concept of stable narrow-line-width and close wavelength spacing dualwavelength lasing in an Er-doped fibre ring laser (EDFRL) by cleaving the spectrum with a wavelength-selective component in the EDFRL. A fibre loop mirror (FLM) combining with a polarization controller (PC) acts as the cleaver. The cleaver can produce a fine pectinate spectrum. By adjusting the PC, the fine pectinate spectrum can be so changeable that cleaving the spectrum of a fibre Bragg grating (FBG) into two parts. As a result, we obtain the dual-wavelength fibre lasering with a bandwidth of only 0.03nm and a wavelength spacing of only 0.07nm. Furthermore, the laser can also perform stable switchable single wavelength or stable different-bandwidth dual-wavelength by carefully adjusting the PC at room temperature. 相似文献
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