Optical Fiber Pumped High Repetition Rate and High Power Nd:YVO4 Picosecond Regenerative Amplifier

Abstract

Abstract:We report a stable optical fiber pumped Nd:YVO4 all solid state regenerative amplifier with all fiber picosecond laser as seed source. 888 nm Yb optical fiber lasers was chosen as pump source to reduce quantum defect for improved thermal performance. At the repetition rate of 99.6 kHz, maximum power of 19.63 W with 36 ps pulse duration were achieved when seeded by a 150 mW picosecond oscillator. The wavelength delivered was 1064.07 nm with spectral width of 0.14 nm.

MHz Repetion Rate Yb:YAG and Yb:CaF2 Regenerative Picosecond Laser Amplifiers with a BBO Pockels Cell

“…In general, the extractable pulse energy is proportional to the inverse of the repetition rate with impact on the small-signal gain. We have also observed an increasing insensitivity [19] of the output power against the variation of the pass number especially for very high repetition rates. This phenomenon can be explained by a numerical simulation (see Table 1) of the rate equations [20] while the results were normalized to a maximum average output power of 1 W at 1 MHz.…”

A High Peak Power and High Beam Quality Sub-Nanosecond Nd:YVO4 Laser System at 1 kHz Repetition Rate without SRS Process

“…As is already known, beam quality always gets worse due to thermally induced birefringence in Nd:YAG crystal [21,24]. Laser systems based on end-pumped bulk Nd:YVO 4 crystal have better beam quality because of natural birefringence architecture, which can alleviate thermally induced birefringence [25][26][27]. At the same time, Nd:YVO 4 is a self-excited Raman scattering crystal [28][29][30].…”

High-repetition-rate and high-power picosecond regenerative amplifier based on a single bulk Nd:GdVO4 crystal

“…Although not so aggressive in heat removal, laser systems based on bulk materials generally employ simpler structures and work more efficiently. These characteristics make bulk materials favored choices as laser media in high-power diode-pumped solid state lasers [12][13][14] . An average output power of 34 W with pulses as short as 140 fs at a 500 kHz repetition rate has been achieved by a bulk Yb:CALGO regenerative amplifier with the implementation of the chirped pulse amplification (CPA) technique [15] .…”