| Nd:YVO4自锁模皮秒激光器 |
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| 引用本文： | 袁瑞霞,彭继迎,李祚涵,郑义,务益杰. Nd:YVO4自锁模皮秒激光器[J]. 红外与激光工程, 2016, 45(3): 305001-0305001(5). DOI: 10.3788/IRLA201645.0305001 |
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| 作者姓名： | 袁瑞霞 彭继迎 李祚涵 郑义 务益杰 |
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| 作者单位： | 1.北京交通大学 理学院 激光研究所,北京 100044; |
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| 基金项目： | 国家自然科学基金(61108021);中央高校基本科研基金(2013JBM091) |
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| 摘 要： | 设计并研究了Nd:YVO4自锁模皮秒激光器,探究了激光器的最佳锁模条件。观察并分析了自锁模皮秒激光器准周期锁模、倍周期锁模状态,研究并测量了结构紧凑的直腔自锁模激光器的输出特性。谐振腔为凹平直腔,Nd:YVO4晶体作为激光增益介质和克尔介质,在未加其他锁模元件的情况下,实现了1 064 nm高效率连续锁模脉冲激光输出。晶体距输入镜16 mm、腔长为90 mm时,对1 064 nm透过率分别为10%、20%、30%和50%的四种输出镜下激光器的输出特性进行了对比分析。对激光器进行优化设计,输出镜透过率为10%,泵浦功率为8 W时,激光器输出功率为2.76 W,斜效率高达43.2%,锁模脉冲重复频率为1.43 GHz,激光器实现了高效、稳定的连续锁模。
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| 关 键 词： | 自锁模 克尔效应 连续锁模 皮秒 |
| 收稿时间： | 2015-07-11 |
Nd:YVO4 self-mode-locked picosecond laser |
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| Affiliation: | 1.Insitute of Laser,School of Science,Beijing Jiaotong University,Beijing 100044,China;2.Key Laboratory of Luminescence and Optical Information,Ministry of Education,Beijing 100044,China |
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| Abstract: | The Nd:YVO4 self-mode-locked picosecond laser was designed and studied, and also the best conditions of the mode-locked lasers were explored. The period-doubling self-mode-locked pulses and the quasi-periodic self-mode-locked pulses in the picosecond laser were observed and analyzed, and the output characteristics of the self-mode-locked laser with straight cavity in compact structure was studied and measured. The resonant cavity was concave flat chamber, under the condition of no other clamping device, the Nd:YVO4 crystal as a laser gain medium and Kerr medium, and the high efficiency continuous mode-locked 1 064 nm laser pulses were outputted. The Nd:YVO4 laser crystal is 16 mm from the input mirror, and the cavity length is 90 mm. The four kinds transmittance in 1 064 nm of output mirror are 10%, 20%, 30% and 50%, respectively, meanwhile the output characteristics of the laser were analyzed in comparison with different output mirrors. By optimizing the design, when the transmittance in 1 064 nm of output mirror is 10%, the output power of the laser is 2.76 W at 8 W incident pump power, and the slope efficiency is up to 43.2%, the repetition rate of mode-locked laser is 1.43 GHz, the laser achieves a high powered and stable continuous wavelength mode-locked. |
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