Coherent has launched a Ti:Sapphire ultrafast laser amplifier for applications such as time-resolved spectroscopy using multiple optical parametric amplifiers, THz generation and high-field physics.
The Legend Elite Duo-HP delivers more than 15W of output power and up to 10mJ of pulse energy.
The amplifier can be configured to provide output pulse durations of less than 25fs, less than 35fs, less than 130fs or 0.5ps to 2ps, with repetition rates from 1kHz to 10kHz.
Thermal gradients and consequent thermal lensing in the Ti:Sapphire crystal present various design and performance challenges at output power levels higher than a few watts.
Until now, the only viable solution has been to cool the Ti:Sapphire crystal to cryogenic temperatures, according to the company.
The Legend Elite Duo HP avoids the cost and complexity of cryo-cooling by using improved TE solid-state cooling, together with a Ti:Sapphire crystal and mounting interface shaped to maximise cooling efficiency and reduce thermal gradients.
As with the standard Legend Elite Duo, this new system incorporates two stages of amplification: a regenerative amplifier followed by a simple single-pass amplifier.
This approach is claimed to ensure excellent beam quality, stability and efficiency compared with designs based on multi-pass amplification.
