No broadband lasing medium like Ti:Saph has been demonstrated yet for terahertz radiation. We show that laser-aligned molecules can amplify broadband terahertz radiation, allowing high-energy chirped-pulse amplification at terahertz frequencies.
We achieve pulse compression down to 24 fs with 1.1 mJ energy and full carrier-envelope phase (CEP) stabilisation at 1 kHz using a compressor combining prisms and chirped mirrors. We demonstrate that this hybrid compression scheme can be scaled in order to produce CEP-stabilized sub-30 fs pulses at the multi-mJ level.
A delay-bandwidth product of 10.7 is achieved using ultra-fast intraband nonlinearities in semiconductor optical amplifiers to generate fast light. A novel chirped-pulse scheme enhances the fast light effect and generates delays in addition to advance.
Multiple-focal-plane spatial phase retrieval for a chirped-pulse-amplification laser is demonstrated for the first time. Advantages of this method are simplicity of setup, ability to measure angular dispersion, and potential integration into precision, on-shot focal-spot diagnostics.
The complete characterization of the 19th harmonic of Ti:sapphire laser was demonstrated using the photoelectron spectral shearing interferometry for the first time. The frequency chirp of a harmonic pulse was sensitively detected by this method.
We present an optimized and automated implementation of the compact Long-Crystal-SPIDER design. The integrated phase-corrections allow for precise pulse reconstruction up to bandwidths of 17 THz and linear chirp detection at bandwidths exceeding 40 THz.
We demonstrate adjustable chirp of directly-modulated injection-locked VCSELs at 10-Gbps resulting from a novel data pattern inversion phenomenon, which leads to chromatic dispersion compensation and a 10X distance increase over standard single-mode fiber.
Efficient infrared 35-THz-wide parametric amplification with energies above 3 mJ is obtained in a 3-stage OPCPA using a combination of a 1030-nm 200-fs Yb- and a 1064-nm 60-ps Nd amplifier seeded with a common Yb oscillator.
A femtosecond thulium-doped passively modelocked fiber laser with internal dispersion compensation is presented. It generates pulses at a center wavelength of 1985 nm with a dechirped pulse duration of 320 fs and an energy of 3.5 nJ. Pulsed operation is achieved using additive pulse mode locking, dispersion compensation is facilitated by an internal grating arrangement.
The authors demonstrate the performance of an optimized gain-switched pulse source that generates 3.5ps pulses. The transform limited pulses perform excellently when employed in an 80Gb/s OTDM set-up and a 10Gb/s 40km transmission experiment.
We present a cryogenically-cooled Yb:LiYF4 chirped-pulse amplification system with an energy of Gt100-mJ boosted by regenerative and multi-pass amplifiers for pumping multi-terawatt, few-cycle optical parametric chirped-pulse amplification.
An optical parametric chirped pulse amplification system producing high-energy, few-cycle pulses at 2.0-mum wavelength with low superfluorescence noise background for high harmonic generation in gas jets is demonstrated.
We report an optical parametric chirped-pulse amplification (OPCPA) system with the pulse duration of 5.5 fs at a 1-kHz repetition rate, pumped by a 450-nm pulse from a frequency doubled Ti:sapphire laser.
We report experimental and numerical results on the pulse dynamic of passively modelocked Yb-doped fiber laser operating in the chirped-pulse regime. A newly design cavity with a CFBG provides positive dispersion with negligible nonlinearity.
A new modelocking regime governed by the Ginzburg-Landau equation is demonstrated in an anomalous dispersion fiber laser. Output pulses are long, flat-topped, and highly-down-chirped, with energies above 150 nJ and repetition rates below 300 kHz.
Femtosecond pulse generation by spectral filtering of a chirped pulse is demonstrated at 1550 nm. An erbium fiber laser with large normal dispersion and a spectral filter generates 200-fs and 1-nJ pulses.
We report on a passively mode-locked erbium fiber laser operating in a highly-positive dispersion regime. Highly-chirped pulses with 5.4 ps duration and 8 nm spectral bandwidth are generated. They are compressed down to 757 fs.
We report the first high-contrast, high-intense Ti:sapphire chirped-pulse amplification laser system incorporating a nonlinear pre-amplifier based on an optical parametric chirped-pulse amplification for use in experiments where relativistic effects dominate the physics.
Performance characteristics and first experiments on Sandiapsilas Z-Petawatt (ZPW) laser will be presented. This system will provide enhanced backlighting capabilities on the Z-Accelerator by achieving multi 10 keV X-rays in less than a picosecond.
A CW, single-longitudinal-mode, optically pumped, type-II distributed-feedback laser at 4.3 mum is reported. Tunability of 27 nm (14 cm-1) is obtained with the novel chirped grating design at a fixed temperature of 77 K.
Financed by the National Centre for Research and Development under grant No. SP/I/1/77065/10 by the strategic scientific research and experimental development program:
SYNAT - “Interdisciplinary System for Interactive Scientific and Scientific-Technical Information”.