Formation of Four Phase-Locked Gaussian Beams by Saturable Absorber in a Neodymium-Doped Yttrium Aluminum Garnet Laser
Formation of Four Phase-Locked Gaussian Beams by Saturable Absorber in a Neodymium-Doped Yttrium Aluminum Garnet Laser
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DOI：
10.1143/apex.5.122701
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发表时间：
2012-11
影响因子：
2.3
通讯作者：
Xiaoming Chen;Y. Bai;M. Jiang;Lifei Li;Yixuan Zhou;Hao Wang;Z. Ren;J. Bai
中科院分区：
文献类型：
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作者：
Xiaoming Chen;Y. Bai;M. Jiang;Lifei Li;Yixuan Zhou;Hao Wang;Z. Ren;J. Bai
由于热诱导双折射效应，在连续波工作中，在二极管侧泵浦掺钕钇铝石榴石（Nd:YAG）激光谐振腔的临界稳定工作区内，观察到具有四个强度峰值点的轴对称TEM01*模式。然后，由于使用了Cr4+:YAG可饱和吸收体，在谐振腔中对称形成了四束锁相高斯光束，并且由于四束光束的相干叠加，在远场中观察到具有正弦-余弦调制高斯轮廓的高对比度干涉条纹。锁相效果强，同时获得稳定的无源调q脉冲。
Due to thermally induced birefringence effects, axisymmetrical TEM01* modes with four intensity peak points are observed in the critical stable working regions of a diode-side-pumped neodymium-doped yttrium aluminum garnet (Nd:YAG) laser resonator in continuous-wave operation. Then, because of the use of a Cr4+:YAG saturable absorber, four phase-locked Gaussian beams are formed symmetrically in the resonator, and high-contrast interference fringes with a sine–cosine modulated Gaussian profile are observed in the far field due to coherent addition of the four beams. The phase locking effect is robust and stable passive Q-switched pulses are obtained simultaneously.