Experimental study on compression of 216-W laser pulses below 2  ps at 1030  nm with chirped volume Bragg grating

Abstract

We report on the characterization of a high-power, chirped volume Bragg grating (CVBG) pulse compressor. It includes measurements of the CVBG’s diffraction efficiency, beam profile, beam quality ( M 2 parameter), pulse spectrum, the CVBG’s temperature, and the thermal lens. These parameters were monitored for a wide range of input laser powers and with different clamping forces applied on the CVBG. This analysis was performed with a CPA-based Yb:YAG thin-disk laser system operating at a wavelength of 1030 nm, a 92 kHz repetition rate, 2 ps pulse duration, and an average output power after compression of 216 W (270 W uncompressed), which is, to the best of our knowledge, the highest value reported to date using this pulse compression technique.

Hundred watt level and high energy compact hybrid fiber femtosecond laser with good beam quality

“…Additionally, to obtain good quality of the compressed beam, the CVBG, which is the core component of the compressor, requires the diameter of the input beam to vary within a very narrow range. Otherwise, it produces excessive beam distortion at high input power due to the thermal lens effect, which makes the beam quality severely degraded [18][19][20].…”

Experimental study on the fluctuation–magnification effect of chirped volume Bragg grating compressor in high-energy, ultrafast, thin-disk chirped pulse amplification system

“…applied the CVBG to compress a 2-μm CPA source with 55 mJ, 4.3 ps pulses at a kHz repetition rate. Štěpánková et al 8 . did a detailed experimental investigation on high-power CVBG compressor, which was performed with a 216-W thin-disk laser system of 1030 nm, 92-kHz repetition rate, and 2-ps pulse duration.…”

Modeling and analysis of bi-function separation under second Bragg incidence by T-type microstructure

“…As an important optical element, diffraction grating has the properties of dispersion [1][2][3][4][5][6], beam splitting [7][8][9][10][11], polarization [12][13][14][15][16][17] and phase matching [18][19][20][21][22] and shows a wide range of applications in different fields. For example, diffraction gratings with high dispersion and high diffraction efficiency, such as the core components in laser pulse compression [23], laser frequency selection [24] and spectral beam combining [25] are widely used in high-power laser systems. In the laser spectral beam combining system, the polarization independence of the grating is beneficial to simplify the system structure and improve the output capability of the system.…”