Avesta ANTAUS型 飞秒光纤激光器

Avesta 固体光纤激光器相关论文

We have achieved experimentally a generation of white-light few-cycle femtosecond laser pulses, using a neon-filled hollow-core fibre. The pulses observed by us are as short as 6.22 fs at the repetition rate of 1 kHz, when the input is characterized by the parameters 2.5 mJ and 33 fs. Pulse compression has been achieved using a supercontinuum produced in a static neon-filled hollow fibre, while a pair of chirped mirrors have compensated the dispersion. Our technique allows for directly tuning the pulse duration via changing the gas pressure, while maintaining near-transform-limited pulses with constant output energies and thus reducing the complications introduced by the chirped pulses. Using the measurements of the optical transmission of the fibre as a function of the gas pressure, we have testified a high enough throughput exceeding 60%. This demonstrates the successful compression that yields few-cycle femtosecond-long pulses, with a wide spectral bandwidth.

Avesta 固体光纤激光器相关论文

We investigated Terahertz generation in organic crystals DSTMS, DAST and OH1 directly pumped by a Cr:forsterite laser at central wavelength of 1.25 μm. This pump laser technology provides a laser-toTHz energy conversion efficiency higher than 3 percent. Phase-matching is demonstrated over a broad 0.1-8 THz frequency range. In our simple setup. we achieved hundred μJ pulses in tight focus resulting in electric and magnetic field larger than 10 MV/cm and 3 Tesla.

脉冲飞秒激光器相关论文

Laser systems with Yb3+ ion doped active elements (yt terbium lasers) are in strong demand owing to their high efficiency and energy capabilities.1,2 Along with high-power cw ytterbium lasers, the pulsed laser systems are quite widespread, with femtosecond output pulses in particular. A powerful source of femtosecond visible light pulses with a central wavelength of 515 nm can be created on the basis of ytterbium laser radiation with wavelength of 1030 nm con verted to second harmonic. Such light pulses with the duration shorter than 20–30 fs and having energy of ∼(10–100)μJ may be widely used. For example, in biology, laser micromachining, parametric laser pumping, and so on. However,the duration of the output pulses of ytterbium laser systems which are designed on the master oscillator-amplifier scheme and operate in the (10−2–1) mJ energy range is longer than 200 fs.3,4 Therefore, nonlinear techniques are used to compress laser pulses down to 30 fs.