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报道了研制高功率全光纤化线偏振掺镱脉冲激光器,并用其抽运光参量振荡器(OPO)的研究工作。激光器以光纤化的声光调Q掺镱光纤激光器作为种子源,用大直径双包层保偏光纤作为增益放大介质。在40 kHz重复频率下,得到1064.2 nm处最大23.5 W的线偏振脉冲激光输出,脉冲宽度约46 ns,偏振消光比(PER)优于10 dB,光束质量因子(M2)约为1.3。利用该全光纤激光器抽运基于周期性畴极化反转掺镁铌酸锂(PPMgLN)晶体的宽带可调谐OPO,在信号光1602 nm通道,获得11.05 W最大光参量输出,其中3168 nm处闲散光功率为3.01 W。OPO能量转换效率为56%,斜率效率为63%。在信号光1508 nm通道,获得9.87 W最大光参量输出,其中3614 nm波长功率为2.75 W。
Reported the development of high power all-fiber linear polarization ytterbium-doped pulsed laser, and use its pumping optical parametric oscillator (OPO) research work. The laser uses fiber-optic acousto-optic Q-switched ytterbium-doped fiber laser as seed source and large-diameter double-cladding polarization-maintaining fiber as gain amplifier. At a repetition rate of 40 kHz, a linearly pulsed laser with a maximum of 23.5 W at 1064.2 nm was obtained. The pulse width was about 46 ns, the extinction ratio (PER) was better than 10 dB, and the beam quality factor (M2) was about 1.3. By using this all-fiber laser to pump a broadband tunable OPO based on periodic domain-polarization reversed-doped lithium niobate (PPMgLN) crystals, a maximum optical output of 11.05 W was obtained at the 1602 nm channel of the signal light. The 3160 nm idler The optical power is 3.01 W. OPO energy conversion efficiency of 56%, slope efficiency of 63%. In the signal light 1508 nm channel, 9.87 W maximum optical parametric output was obtained, of which 3614 nm wavelength power was 2.75 W.