Flexible picosecond burst generation in a mode-locked Nd:YVO4 laser with a compound cavity
Flexible picosecond burst generation in a mode-locked Nd:YVO4 laser with a compound cavity
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具有复合腔的锁模 Nd:YVO4 激光器中灵活的皮秒突发生成
DOI：
10.1007/s00340-019-7256-2
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发表时间：
2019-07
期刊：
影响因子：
--
通讯作者：
Lin Xuechun
中科院分区：
文献类型：
--
作者：
He Chaojian;Yu Haijuan;Zhang Jingyuan;Zou Shuzhen;Zhao Pengfei;Lin Xuechun
报道了在复合腔被动锁模Nd：YVO4激光器中产生脉冲数可控的皮秒脉冲的实验结果。这是首次使用附加SESAM的复合腔产生脉冲串。该装置是通过在腔体中插入HWP，将主腔中的部分光反射到辅腔中，然后反射的光束在辅腔中延迟一段时间后被送回。通过控制从辅助腔反射到主腔的功率，可以产生一系列脉冲串，具有可选择的脉冲数和可调节的脉冲之间的时间间隔。脉冲串中相邻两个皮秒脉冲之间的时间间隔可以通过改变两个腔体之间的长度差来调整。脉冲串的时间宽度可以从皮秒到纳秒调节，并且脉冲串的重复频率与连续波锁模激光器相同。爆发的产生可能归因于来自两个腔的激光脉冲的时间相加。这项工作为产生可控皮秒激光脉冲提供了一种有用的方法。
We present the generation of picosecond bursts with controllable pulse number in a passively mode-locked Nd:YVO4 laser with a compound cavity. This is the first time to use a compound cavity with additional SESAM to generate pulse burst. The device is constructed by inserting an HWP in the cavity, which reflects part of light in the main cavity into the auxiliary cavity and then the reflected beam is sent back after a delay in the auxiliary cavity. By controlling the power reflected into the main cavity from the auxiliary cavity, a series of bursts can be created with a selectable pulse number and adjustable temporal separation between the pulses. The temporal separation between two adjacent picosecond pulses in the burst can be adjusted by changing the length difference between two cavities. The temporal width of the burst can be adjusted from picosecond to nanosecond, and the repetition rate of the burst is the same as that in continuous wave mode-locked laser. The generation of the burst is presumably attributed to the temporal addition of laser pulses from the two cavities. This work provides a useful method for generating controllable picosecond laser burst.
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