%0 Journal Article
%T Compensation for Self-Focusing of Picosecond Pulses in Nd:Glass by Using Cascaded Quadratic Nonlinearity<br>Compensation for Self-Focusing of Picosecond Pulses in Nd：Glass by Using Cascaded Quadratic Nonlinearity
%A CHEN Hao
%A WEN Shuang-Chun
%A ZHU He-Yuan
%A QIAN Lie-Jia
%A <br>陈昊
%A 文双春
%A 朱鹤元
%A 钱列加
%J 中国物理快报
%D 2004
%I 
%X One of the obstacles in obtaining high power/energy laser sources is self-focusing, which stems from the nonlinear phase shift (B-integral) accumulated during beam propagation in Kerr media. Phase-mismatched secondharmonic generation may impose a nonlinear phase shift on the fundamental with controllable sign and magnitude,which can be used to compensate for self-focusing with a single-pass configuration. We have demonstrated such a possibility for picosecond pulses theoretically and experimentally, and both configurations of pre- and postcompensation by a β-barium borate crystal have been studied in detail. Cascaded second-order nonlinearity-based compensation for self-focusing may provide an auxiliary means to the conventional B-integral control techniques.
%K 42
%K 60
%K Jf
%K 42
%K 65
%K Jx
%K 42
%K 65
%K Ky<br>高能激光
%K 自聚焦
%K 非线性周相移动
%K 硼酸钡晶体
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=E27DA92E19FE279A273627875A70D74D&aid=E3F1CD3A63C4F42CB7FFC8AB6082C21C&yid=D0E58B75BFD8E51C&vid=659D3B06EBF534A7&iid=59906B3B2830C2C5&sid=99E312E13904482F&eid=3C934644D84F2E3C&journal_id=0256-307X&journal_name=中国物理快报&referenced_num=0&reference_num=11