Optical parametric oscillator pumped by a 100-kHz burst-mode Yb-doped fiber laser

Abstract

We demonstrate an optical parametric oscillator pumped at a repetition rate of 100 kHz by a burst-mode Yb-doped fiber laser. Pulse energies of 1.5 µJ were generated with five 4.8-µJ pump pulses. Pulse-to-pulse fluctuations could be suppressed even when only five pump pulses were used. The measured pulse length was 190 fs, which was considerably shorter than the 350-fs pump pulse length. The burst-mode operation is an easy and powerful way to increase the pulse energies of optical parametric oscillators pumped with femtosecond pulses.

MRS-measured Glutamate versus GABA reflects excitatory versus inhibitory neural activities in awake mice

“…The latter laser system is home-made and consisted of a mode-locked fiber oscillator, multi-stage fiber amplifiers and a pulse compressor. We used a nonlinear amplification method 46,47,48 Two-photon imaging was performed in awake mice. The experimental protocol for measurements by two-photon imaging was reported previously 8,45 .…”

Compact picosecond mid-IR PPLN OPO with controllable peak powers

“…Nevertheless, the burst-mode operation provided a compact OPO device offering flexible control of MIR pulse repetition-rate and peak-power. The burst-mode OPO also provided good power and pulse stabilities (beyond the short initial build up transient) similar to that during cw-pulsed operation, with those different time-window settings because of the oscillated signals all reached a steady state which generally suppress the pulse-to-pulse fluctuation [12]. In order to improve the conversion efficiency of the burst-mode OPO, shaping the pump burst-window profile could be considered.…”

“…Other techniques such as high-harmonic-cavity OPO and intra-cavity-pumped OPO could reduce the OPO cavity length for low repetition rate, however, those solutions either require high intense pump pulse or complex cavities [8,9]. Compared to these techniques, burst-mode OPOs, pumped by a burst of pulses with a high intra-burst pulse repetition rate but a low inter-burst pulse repetition rate, allows a short cavity length while simultaneously achieve high peak power and high repetition rate [10][11][12]. Such burst pulsed lasers offer enhanced imaging quality in photoacoustic spectroscopy [13], improved thermal management in tissue ablation process [14] and enabled laser-jamming of heat sinking missiles [15].…”

“…Such burst pulsed lasers offer enhanced imaging quality in photoacoustic spectroscopy [13], improved thermal management in tissue ablation process [14] and enabled laser-jamming of heat sinking missiles [15]. Intra-burst pulse repetition rate of 48-MHz mode-locked laser pumped OPO has been demonstrated in [12] and an OPO with a higher intra-burst pulse repetition rate of 1.1 GHz was reported in [10]. However, an external pulse multiplier was employed to increase the pump laser fundamental repetition rate, which caused uneven intra-burst pulse amplitude so that affected the generated MIR pulse energy uniformity and associated pump-to-idler conversion efficiency.…”

4 mJ Rectangular- Envelope GHz-Adjustable Burst-Mode Fiber-Bulk Hybrid Laser and Second-Harmonic Generation

“…High peak power and high pulse energy burst-mode pulse lasers distinctively contain a bunch of high repetition rate pulses with durations ranging from the ultrafast regime (<10 ps) to several nanoseconds and possess a great number of applications [1][2][3][4][5][6][7][8][9]. For example, ultrafast burst-mode lasers have been demonstrated more efficient and accurate in cooled ablation material processing [1][2][3].…”