With the new Legend Elite CEP, Coherent expands its family of Carrier-Envelope Phase stabilized ultrafast lasers.

The Legend Elite CEP amplifies the ultrafast pulses generated by the Micra CEP up to the millijoule level of energy required for applications such as High Harmonics Generation and Attosecond science.

Based on the market leading Legend Elite platform, this new ultrafast regenerative amplifier includes an active feedback control to lock the phase velocity of the oscillating light field to the group velocity of the phase envelope. Thus, for ultra short pulses consisting of only a few optical cycles, the peak of the oscillating electrical field can be maximized under the phase envelope.

At the heart of the Legend Elite CEP is a non-linear interferometer. An octave-spanning optical spectrum is generated by focusing a small part of the amplifier beam on a sapphire plate. The red end of this spectrum is frequency-doubled and collinearly combined with the blue end of this same broad spectrum. The resulting spectral interference fringes are measured by a spectrometer and custom software uses this signal to measure, stabilize, and control the Carrier-Envelope Phase by making adjustments in the Legend amplifier.

The Legend Elite CEP is currently available with an average power of up to 4W, pulse energy up to 4 mJ and pulse duration of less than 35 fs. Additional configurations are under testing and will be released in the near future. Coherent welcomes enquiries from customers with higher requirements.

With the Verdi pumped Micra CEP and the Evolution pumped Legend Elite CEP, Coherent is the first and only company to offer a complete CEP-stabilized ultrafast amplifier system designed and built by a single manufacturer.

With the largest worldwide team of experienced service personnel ready to support you at every step, Coherent is your CEP partner, from A to Z.