Yb3+:CaYAlO4 based chirped pulse regenerative amplifier.
The results of an experimental study of the chirped pulse amplification regime are reported for the Yb:CaYAlO4 crystal with different polarization states in the gain media for the first time, to the best of our knowledge. A maximum output power of 4.2 W with 310 fs pulse duration was obtained for s polarization at 200 kHz repetition rate seeded by a 85 fs Yb:KYW oscillator. 215 fs pulses with an output power of 3 W and 190 fs with 2.3 W output power were demonstrated for p polarized light in the crystal. Gain narrowing effects for different polarization states in the crystal are discussed.
Optics letters