Session Index

The ultrashort pulse laser is composed of many components of different frequency which have different propagate speed in material because of different frequency. The result called dispersion. In this paper, we take frequency resolve optical gating(FROG) to measure the ultrashort pulse information. Using 4-f pulse shaper system which compose of a blaze grating and a 39 channel linear deformable mirror to achieve pulse compression

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In this study, we investigated the lasing characteristics of Photonic-Crystal Surface-Emitting Laser (PCSEL) with honeycomb lattice. The light-current-voltage (L-I-V) performance, lasing spectrum, far-field patterns, and the photonic band diagram were analyzed both theoretically and experimentally. Furthermore, the laser beam featuring with orbtial angular momentum (OAM) was predicted from the numerical simulation and observed from the far-field pattern, which gives rise to more extensive applications.

 

A 10 GHz active mode-locked Er-doped fiber laser is stabilized by a high Finesse Fabry-Pérot etalon. The output pulses are nonlinearly compressed from 15 ps down to 2 ps by using the high nonlinearity fiber (HNF) combined with the single mode fiber (SMF). Excellent agreement between the simulation and experimental results is achieved. The simulation also indicates that the stationary rescale pulse scheme can be utilized to further compress the pulse width down to 500 fs if multiple stages of HNF+SMF are used.

 

He^1+ based high-harmonic generation operated from water window to keV spectral range is proposed. The selective-zoning method of quasi-phase-matching is utilized to overcome the severe plasma dispersion in the highly ionized medium. Our calculation shows that the relative conversion efficiency reaches about 15% of the perfect phase-matching condition. Wavelength tunability is achieved by incorporating a programmable spatial-light modulator to control the quasi-phase-matching pattern.

 

Terawatt level CO2 laser is considered a promising tool for proton acceleration. We choose a new approach to construct a high-energy seeding system for large-aperture CO2 amplifiers based on nonlinear mixing of 1.3-µm and 1540-nm pulses. In this paper we report
the performance of a Nd:YAG disk-based regenerative amplifier seeded by an electrically synchronized 700-ps, 1338-nm gain-switched diode laser. The seeded amplifier produces an output energy of ∼3.5-mJ with a timing jitter of ∼30-ps-rms, sufficient for smoothing the comb-like spectrum of CO2 amplifiers by power broadening.