High Speed Electro-Optical Cavity Dumping of Mode- Locked Laser Oscillators

Efficient versatile-repetition-rate picosecond source for material processing applications

“…The amplifier consists in a two-or four-pass 3D amplifier [26] using a 10 mm long, 0.1%-doped Nd:YVO 4 crystal pumped with a 400 μm diameter fiber-coupled diode delivering up to 30 W (Lissotschenko Mikrooptic). Since we need both high gain amplificationwith gains around a few hundreds-and good energy extraction, around 25% of the pump power, the design of the amplifier is critical [27][28][29]. To maintain the polarization, the corner cube used between the two and four passes consists of a bulk high-reflection dielectric-coated corner cube instead of a standard silver-coated retroreflector.…”

920 kHz, low-repetition rate, mode-locked Er-doped fiber ring laser at 1534 nm

“…The multi-photon process in the femtosecond to picosecond time region is an adiabatic process, in which many fundamental interactions between molecules and solid states have been investigated. Low repetition rate of less than 1 MHz mode-locked pulses has been reported using a damping method [1]. High pulse energy of nano-Jules is also reported at a high repetition rate [2].…”

High Gain Solid-State Amplifiers for Picosecond Pulses

“…Usually, intra-or extra-cavity pulse-picking from a diode-pumped low-power picosecond oscillator at ~ 100-MHz repetition rate is used to seed a regenerative amplifier. By this means, the pulse energy is increased from nanojoules to within a range from few microjoules to few millijoules, depending on the operating frequency (Siebold et al, 2004;Kleinbauer et al, 2005;Killi et al, 2005). For this aim, too, grazing-incidence bounce amplifiers provide an interesting alternative, since their gain of ≈ 30 dB/pass allows efficient energy extraction in just two or three passes, thus avoiding the higher complexity of the former schemes and requiring only a versatile, extra-cavity acousto-optic pulse-picker.…”