Thermal Lensing Compensation in the Development of Chirped Pulse Amplification Laser System

What is it about?

We present 30 fs pulse duration home-made chirped pulse amplification Ti:sapphire laser system operating at a repetition rate of 1 kHz with 4.0 mJ pulse energy. The Ti:sapphire laser system with ∼ 819 nm center wavelength has a long-cavity oscillator, four pass grating stretcher, 8-pass pre-amplifier, 4-pass post-amplifier and a double pass grating compressor. The Peltier coolers and thermal eigenmode post-amplifier are introduced to compensate the thermal lensing of the crystal in the amplifiers and to enhance the beam focusability on the crystal.

Featured Image

Why is it important?

The thermal lens effect and thermal distortion were compensated by em- ploying the Peltier coolers and thermal eigenmode in the post-amplifier.