Abstract

The field of ultrashort pulsed laser sources in the 2 μm wavelength region is rapidly evolving, especially as frontend lasers for pumping optic parametric devices [1,2] or solid state Ho-based amplifiers [3]. Furthermore, pulsed laser sources are highly suitable for electron acceleration applications due to the wavelength scaling of the dephasing length for nonrelativistic and relativistic electrons [4]. High pulse energy chirped pulse amplifier (CPA) systems incorporating a single chirped bragg grating (CVBG) and a pulse picking device have been demonstrated, but were yet limited to the Erbium-wavelength range [5]. Common environmentally stable all-polarization maintaining (PM) femtosecond lasers at 2 μm are bound to quite high repetition rates in the MHz regime, yet limiting the contrast between pulse energy and average output power.

© 2015 IEEE