data for the study of "LD pumped 3.3J/1Hz nanosecond Nd: glass pre-amplifier for SG-II up laser facility"

The amplifier has the characteristics of high extraction efficiency, arbitrary shaping of temporal waveform and spatial beam intensity, and flexible spectral control to suppress the FM-to-AM conversion in the laser amplifier. Excellent beam quality is achieved with thermal lensing and thermal depolarization compensation.

When a laser pulse with energy of 1.82 mJ and pulse width of 5 ns was injected into the amplifier, the system output energy reaches up to 3.3J with repetition rate of 1 Hz at the central wavelength of 1053.3 nm. The near-field modulation of the amplified output beam is lower than 1.2, indicating minimal distortion in near field. And, the far-field focusing ability of the beam is 90% at 2.9 times diffraction limit (TDL).