基于新型二维材料和半导体可饱和吸收体的全固态中红外2μm波段调Q、双调Q及锁模激光特性研究
发布时间：2018-08-27 06:23
【摘要】：LD泵浦的全固态中红外2 μm波段脉冲激光器由于其在医疗、材料加工、科研、军事以及作为其他中红外激光泵浦源方面的广泛应用得到了人们越来越多的关注。各类新型二维材料为激光的发展进步提供了新的机遇。锁模激光技术作为产生超短脉冲激光的根本途径,也成为当前2μm波段脉冲激光发展中一个重要的研究领域。论文以Tm3+掺杂和Tm3+/Ho3+共同掺杂晶体为激光增益介质,分别利用不同新型二维光学材料和锑化物量子阱半导体材料为饱和吸收体,开展了 2 μm波段调Q、双调Q以及锁模激光特性的研究。具体内容总结如下:Ⅰ.基于石墨烯(graphene)实现了 2μm波段W级输出,获得最短脉宽为235 ns。Ⅱ.基于热氧化分解法制备了二硫化钨(WS2),并进行性能表征。基于此材料,实现了 LD泵浦2μm波段Tm:LuAG晶体调Q输出,最短脉宽为660 ns。Ⅲ.利用气相沉积法得到了二硫化钼(MoS2)并进行表征,实现LD泵浦2 μm波段Tm,Ho:YAP晶体调Q脉冲激光输出。Ⅳ.基于声光/石墨烯(AOM/graphene)双损耗调制技术实现了 LD泵浦Tm:LuAG晶体全固态2μm波段脉冲激光运转,获得的最大脉宽压缩比和峰值功率提高比分别为3.11和97.4,同时输出脉冲稳定性得到了大幅度提升。实验结果表明双损耗调制技术可用于2μm波段脉冲激光,并有效地压缩脉宽,提高峰值功率和脉冲稳定性。Ⅴ.基于电光/砷化镓(EOM/GaAs)双损耗调制技术实现了2μm波段Tm,Ho:YAP脉冲激光运转,获得的最短脉宽和最高峰值功率分别为28ns和74kW,这是目前为止LD泵浦全固态2 μm波段脉冲激光的最大峰值功率。Ⅵ.基于碳纳米管/石墨烯(MWCNT/graphene)双损耗调制技术实现了 2 μm波段Tm:LuAG脉冲激光运转,并研究了双被动开关调制技术脉宽压缩机理。研究结果表明,双被动开关调制技术脉宽压缩的原因不仅是双被动开关调制下具有大的插入损耗,更是因为两种不同材料具有不同渡越时间,作用于不同的脉冲形成阶段。Ⅶ.利用新型锑化物量子阱,实现了 LD泵浦2μm波段Tm:LuAG超快运转,获得的脉宽为13.6ps,这是目前为止利用Tm:LuAG晶体得到的最短锁模脉宽。论文的主要创新工作包括:Ⅰ.首次实现了LD泵浦Tm:LuAG晶体全固态2μm波段graphene调Q激光输出,获得了2μm波段graphene调Q激光的最高输出功率和最短脉宽。Ⅱ.证明了WS2在2 μm波段具有饱和吸收特性,并首次实现了2μm波段Tm:LuAG晶体WS2调Q激光输出,最短脉宽660ns。Ⅲ.首次实现了 LD泵浦2μm波段Tm,Ho:YAP晶体MoS2被动调Q运转,最短脉宽435 ns,峰值功率达10 W以上。Ⅳ.首次实现了 LD泵浦2μm波段Tm:LuAG晶体AOM/graphene双调Q激光输出,最短脉宽170ns,峰值功率达3117W。Ⅴ.首次实现了 LD泵浦Tm,Ho:YAP晶体EOM/GaAs双调Q激光输出,最短脉宽28 ns,最高峰值功率74 kW。Ⅵ.首次实现了 LD泵浦Tm:LuAG晶体2 μm波段MWCNT/graphene双调Q输出,最短脉宽102 ns,最高峰值功率为171 W。Ⅶ.基于GaSb-SESAM,首次实现了 LD泵浦Tm:LuAG晶体2 μm波段连续波锁模,脉宽为13.6 ps。
[Abstract]:LD-pumped all-solid-state mid-infrared 2-micron-band pulsed laser has attracted more and more attention due to its wide applications in medical, material processing, scientific research, military and other mid-infrared laser pumping sources. Various new two-dimensional materials provide new opportunities for the development and progress of laser. Mode-locked laser technology as a production The fundamental way to generate ultrashort pulsed lasers has also become an important research field in the development of 2-micron-band pulsed lasers. In this paper, Tm3+ doped and Tm3+/Ho3+ co-doped crystals are used as laser gain media to develop 2-micron wave using different two-dimensional optical materials and antimonide quantum well semiconductor materials as saturated absorbers, respectively. The detailed contents are summarized as follows: 1. Based on graphene, the W-level output of 2 micron band is realized, and the shortest pulse width is 235 ns. 2. Based on thermal oxidation decomposition method, tungsten disulfide (WS2) is prepared and its properties are characterized. Molybdenum disulfide (MoS2) was obtained by vapor deposition and characterized. LD-pumped 2-micron band Tm, Ho:YAP Q-switched pulsed laser output was realized. IV. LD-pumped Tm:LuAG crystal pulsed laser operation at 2-micron band was realized based on AOM/graphene dual-loss modulation technique. The maximum pulse compression ratio and peak power enhancement ratio are 3.11 and 97.4, respectively, and the output pulse stability is greatly improved. The experimental results show that the dual-loss modulation technique can be used in 2-micron-band pulsed laser, and can effectively compress the pulse width, improve the peak power and pulse stability. V. Based on the electro-optical/GaAs dual-loss The modulation technique realizes the operation of 2-micron Tm, Ho:YAP pulsed laser. The shortest pulse width and the highest peak power are 28 ns and 74 kW, respectively. This is the highest peak power of LD-pumped all-solid-state 2-micron pulsed laser up to now. VI. The 2-micron Tm:LuAG based on the MWCNT/graphene dual-loss modulation technique is realized. Pulse width compression mechanism of double passive switching modulation technique is studied. The results show that the reason for pulse width compression of double passive switching modulation technique is not only the large insertion loss under double passive switching modulation, but also the effect of two different materials on different pulse forming stages with different transit time. LD-pumped 2-micron band Tm:LuAG ultra-fast operation has been achieved by using a novel antimonide quantum well with a pulse width of 13.6 PS. This is the shortest mode-locked pulse width obtained by using Tm:LuAG crystal up to now. The main innovations in this paper include: I. LD-pumped Tm:LuAG crystal graphene Q-switched laser output in all-solid-state at 2 micron band has been realized for the first time, and 2 micron pulse width has been obtained. Maximum output power and shortest pulse width of M-band graphene Q-switched laser.II.It is proved that WS2 has saturated absorption characteristics in 2 micron band.The output of 2 micron band Tm:LuAG crystal WS2 Q-switched laser is realized for the first time with the shortest pulse width of 660 ns.III.LD-pumped 2 micron band Tm,Ho:YAP crystal MoS2 passively Q-switched operation is realized for the first time with the shortest pulse width of 435 ns and peak power. LD-pumped Tm:LuAG crystal AOM/graphene double-Q-switched laser with a minimum pulse width of 170 ns and a peak power of 3117 W.V. LD-pumped Tm, Ho:YAP crystal EOM/GaAs double-Q-switched laser with a minimum pulse width of 28 ns and a maximum peak power of 74 kW.VI has been realized for the first time. MWCNT/graphene dual-Q-switched output with a minimum pulse width of 102 ns and a maximum peak power of 171 W._. Based on GaSb-SESAM, the LD-pumped Tm:LuAG crystal mode-locked in 2 micron band is realized for the first time with a pulse width of 13.6 PS.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN24
本文编号：2206396
[Abstract]:LD-pumped all-solid-state mid-infrared 2-micron-band pulsed laser has attracted more and more attention due to its wide applications in medical, material processing, scientific research, military and other mid-infrared laser pumping sources. Various new two-dimensional materials provide new opportunities for the development and progress of laser. Mode-locked laser technology as a production The fundamental way to generate ultrashort pulsed lasers has also become an important research field in the development of 2-micron-band pulsed lasers. In this paper, Tm3+ doped and Tm3+/Ho3+ co-doped crystals are used as laser gain media to develop 2-micron wave using different two-dimensional optical materials and antimonide quantum well semiconductor materials as saturated absorbers, respectively. The detailed contents are summarized as follows: 1. Based on graphene, the W-level output of 2 micron band is realized, and the shortest pulse width is 235 ns. 2. Based on thermal oxidation decomposition method, tungsten disulfide (WS2) is prepared and its properties are characterized. Molybdenum disulfide (MoS2) was obtained by vapor deposition and characterized. LD-pumped 2-micron band Tm, Ho:YAP Q-switched pulsed laser output was realized. IV. LD-pumped Tm:LuAG crystal pulsed laser operation at 2-micron band was realized based on AOM/graphene dual-loss modulation technique. The maximum pulse compression ratio and peak power enhancement ratio are 3.11 and 97.4, respectively, and the output pulse stability is greatly improved. The experimental results show that the dual-loss modulation technique can be used in 2-micron-band pulsed laser, and can effectively compress the pulse width, improve the peak power and pulse stability. V. Based on the electro-optical/GaAs dual-loss The modulation technique realizes the operation of 2-micron Tm, Ho:YAP pulsed laser. The shortest pulse width and the highest peak power are 28 ns and 74 kW, respectively. This is the highest peak power of LD-pumped all-solid-state 2-micron pulsed laser up to now. VI. The 2-micron Tm:LuAG based on the MWCNT/graphene dual-loss modulation technique is realized. Pulse width compression mechanism of double passive switching modulation technique is studied. The results show that the reason for pulse width compression of double passive switching modulation technique is not only the large insertion loss under double passive switching modulation, but also the effect of two different materials on different pulse forming stages with different transit time. LD-pumped 2-micron band Tm:LuAG ultra-fast operation has been achieved by using a novel antimonide quantum well with a pulse width of 13.6 PS. This is the shortest mode-locked pulse width obtained by using Tm:LuAG crystal up to now. The main innovations in this paper include: I. LD-pumped Tm:LuAG crystal graphene Q-switched laser output in all-solid-state at 2 micron band has been realized for the first time, and 2 micron pulse width has been obtained. Maximum output power and shortest pulse width of M-band graphene Q-switched laser.II.It is proved that WS2 has saturated absorption characteristics in 2 micron band.The output of 2 micron band Tm:LuAG crystal WS2 Q-switched laser is realized for the first time with the shortest pulse width of 660 ns.III.LD-pumped 2 micron band Tm,Ho:YAP crystal MoS2 passively Q-switched operation is realized for the first time with the shortest pulse width of 435 ns and peak power. LD-pumped Tm:LuAG crystal AOM/graphene double-Q-switched laser with a minimum pulse width of 170 ns and a peak power of 3117 W.V. LD-pumped Tm, Ho:YAP crystal EOM/GaAs double-Q-switched laser with a minimum pulse width of 28 ns and a maximum peak power of 74 kW.VI has been realized for the first time. MWCNT/graphene dual-Q-switched output with a minimum pulse width of 102 ns and a maximum peak power of 171 W._. Based on GaSb-SESAM, the LD-pumped Tm:LuAG crystal mode-locked in 2 micron band is realized for the first time with a pulse width of 13.6 PS.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN24
【参考文献】
相关博士学位论文 前1条
1 冯天利;全固态中红外2μm波段激光特性研究[D];山东大学;2015年
，本文编号：2206396
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