High Power Femtosecond Lasers

Abstract

The InnoSlab concept was developed at Fraunhofer ILT more than 15 years ago using Nd‐based laser crystals. InnoSlab is a highly efficient amplification setup that allows for an extremely broad range of laser parameters due to its inherently simple setup. Today InnoSlab using Yb‐based laser crystals is the leading amplifier technology for achieving highest output power in the ultrashort pulse regime.

Femtosecond laser three-dimensional micro- and nanofabrication

“…However, recent advances in the development of high average power, high repetition rate, stable femtosecond laser sources have significantly increased the throughput and reliability of femtosecond laser 3D micro and nanofabrication, which has provided impetus for the acceleration of industrial and practical applications of laboratory-developed technologies. 206,207 The techniques introduced in this review, such as the fabrication of 3D polymer micro-and nanocomponents by TPP, optical waveguide writing, the fabrication of microfluidic channels, and glass-glass bonding, have long been under intensive investigation, and now becomes more and more open for not only scientific research in various fields but also product development. TPP can be used to produce a wide variety of micro-and nanodevices for photonics, micro-and nanomechanics, biological studies, and medical treatment.…”

Using an intense laser beam in interaction with muon/electron beam to probe the noncommutative QED

“…In recent years the leaser average powers are about a few watts which are higher than the range of tens of milliwatts to watts for the average powers of ruby lasers in the early 1960s. However, recently some progress has been made to improved the average power of ultrafast lasers [35], for instance see [36][37][38][39]. Furthermore, the Compton back scattering has been also considered since 1980s to produce photon beams.…”

“…The generation rates of the circular polarized photons R V | µB for different values of noncommutative scale are given in table 3. We can also give an estimation on the generation rate of the circular polarization due to the electron and laser beam interaction R V | eB as follows To obtain the rate R V | eB 10 4 /sec for an electron beam withε e 10 10 TeV cm −2 s −1 and Λ NC = 1 TeV, a laser beam with averageP ∼ 1 KW is needed which seems to be available in the near future with the present laser technologies [36,38,39]. Nevertheless, the generation rate of circular polarized photons due to the electron and laser beams interaction for different values of noncommutative scale and the laser average power is given in table 4.…”

Femtosecond Laser-Pulse-Induced Surface Cleavage of Zinc Oxide Substrate

“…ZnO-based thin films fabricated by pulsed laser deposition have been widely reported by a vast number of researchers [ 2 ]; in most of these reports, a UV laser with a nanosecond order pulse duration was used. By contrast, ZnO-based functional surface structures fabricated by direct laser irradiation upon a ZnO substrate occur seldom, despite the appearance of cheaper lasers with extremely high outputs [ 16 , 17 ]. Recently, femtosecond laser-induced nano-ripples on ZnO surfaces have been separately reported by Hang et al [ 18 ] and Liu et al [ 19 ].…”