We demonstrate an extension of forming a photorefractive volume grating in an Fe:LiNbO3 crystal by chirped intense femtosecond laser pulses generated from a Ti:Al2O3 regenerative amplifier at 1 kHz. We confirm that one-photon absorption is still dominant in the Fe:LiNbO3 crystal up to 70 GW/cm2. To generate a photorefractive grating at such a low laser repetition rate within a practical writing time, the laser pulse intensity is increased to >30 GW/cm2. Furthermore, we demonstrate the amplification of femtosecond laser pulses by the chirped volume grating that is written in the Fe:LiNbO3 by two-wave mixing.
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics