Coherent Introduces Highest Power Ultrafast Amplifier System

Coherent Legend Elite Duo HP (PresseBox) (Santa Clara, Calif., ) A new Ti:Sapphire ultrafast laser amplifier from Coherent, Inc. (Santa Clara, CA) (Nasdaq: COHR) delivers over twice the power of any comparable product. Specifically, the Legend Elite Duo-HP offers over 15 Watts of output power, and the highest pulse energy (up to 10 mJ) currently on the market for a kHz class, thermoelectrically (TE) cooled amplifier. Legend Elite Duo-HP can be configured to provide output pulse durations of <25 fs, <35 fs, <130 fs, or 0.5 ps to 2 ps with repetition rates in the range 1 kHz to 10 kHz.

Thermal gradients and consequent thermal lensing in the Ti:Sapphire crystal present significant 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. Legend Elite Duo HP avoids the cost and complexity of cryocooling by using improved TE solidstate cooling, together with a Ti:Sapphire crystal and mounting interface shaped to maximize 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 singlepass amplifier. This approach ensures superior beam quality, stability and efficiency compared to designs based on multipass amplification

Applications for the Legend Elite Duo-HP span several areas of research. Examples include timeresolved spectroscopy using multiple optical parametric amplifiers (OPAs), THz generation, and highfield physics.


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Dipl. Betriebsw. Petra Wallenta
Coherent GmbH
PR Manager Europe / MARCOM Manager Excimer
David Kuntz
Technical Marketing Services


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