再生放大器宽带光谱整形的双折射片设计

提出了一种用于再生放大器中展宽光谱的双折射片的设计方法，利用这种方法设计了厚度为761微米的石英双折射片，并将其插入钛宝石再生放大器中，有效抑制了增益窄化效应，实验的结果和理论计算一致。使用设计的石英双折射片后光谱带宽由使用前的28nm展宽到了62nm，最后压缩脉冲为23fs。

A method to design a birefringent plate (BP) for broadening spectrum in a regenerative amplifier is presented. Using this method, we design a quartz BP with thickness of 761 microns inserted into a Ti:sapphire regenerative amplifier. The gain narrowing effect is reduced efficiently, and the experimental results agree with the calculation well. The bandwidth is broadened from 28 to 62 nm using the designed quartz BP and the pulses are compressed to ~23 fs.