Diode-pumped Kerr-lens mode-locked femtosecond Yb:YAG ceramic laser

Abstract

We experimentally demonstrated a diode-pumped Kerr-lens mode-locked femtosecond laser based on an Yb:YAG ceramic. Stable laser pulses with 97-fs duration, 2.8-nJ pulse energy, and 320-mW average power were obtained. The femtosecond oscillator operated at a central wavelength of 1049 nm and a repetition rate of 115 MHz. To the best of our knowledge, this is the first demonstration of a Kerr-lens mode-locked operation in a diode-pumped Yb:YAG ceramic laser with sub-100 fs pulse duration.

Instability and Ultra-high frequency spectrum pulse train in passively Q-switched Yb: LuAG ceramic laser

“…The optical emission cross section area of Yb3 + doped laser gain material is similar to the base transverse mode size of passive Q-switched laser, which can avoid the mode interference of complex transverse mode at high power, and has a long excitation photon lifetime (951µs), which is more suitable for pulsed high energy and peak operation [7,8]. The energy level radiation transition of Yb3 + ion is mainly between the same electronic level 2F7/2 and 2F5/2 [7,9], and the cross relaxation is almost negligible [10][11][12], which can be used as a gain material for laser design with dense particles and high photon e ciency. Yb: YAG is the more studied Yb3 + ion doped gain laser material.…”

Coupling effect on charge‐transfer mechanism of surface‐enhanced resonance Raman scattering

“…In the last few years, optical properties and electronic structures of many actinide‐embedded gold clusters have been investigated, such as U@Au 14 , Th@Au 14 , and Sg@Au 12 etc . Recently, a review paper has discussed the unique effects of 5f‐elements on spectroscopic properties and electronic structures of actinide‐embedded gold model, which is because of the hyperactive valence electrons (5f, 6d) of 5f‐elements. In addition, the valence electrons of actinide elements can enhance the intensity of charge‐transfer transition between metals and molecules, according to the results from a current experimental study about SERS .…”