Abstract
In this paper a single-channel chirped pulse amplification laser system based on Yb-doped photonic crystal fiber was constructed, which achieved a pulse energy output of 1 mJ with a beam quality close to the diffraction limit. Pulsed synchronous pumping was used to suppress amplified spontaneous emission at a repetition rate of 1 kHz. The de-chirped pulse width of 231 fs was achieved by precise systematic dispersion control, and the corresponding peak power reached 3.85 GW.
Highlights
High energy femtosecond lasers are widely used in many industrial and academic fields [1,2,3]
In order to obtain such required output parameters, fiber femtosecond lasers are widely acclaimed for their high average power capability, relatively simple setup, and excellent beam quality
Extracting ultra-short laser pulses with a high peak power is significantly more challenging than bulk laser systems because the high intensity in the fiber core lasts for a fairly long interaction time, which leads to nonlinear distortions of pulse mainly caused by self-phase modulation (SPM)
Summary
High energy femtosecond lasers are widely used in many industrial and academic fields [1,2,3]. The short pulse width and high peak power of femtosecond pulses are the key to driving nonlinear optical processes. In order to obtain such required output parameters, fiber femtosecond lasers are widely acclaimed for their high average power capability, relatively simple setup, and excellent beam quality.
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