Factors That Influence Peak Power of Q-Switched Fiber Laser

Abstract

Q-switched fiber lasers are very attractive sources in many applications such as military affairs, surgical operation, laser machining, laser marking, nonlinear frequency conversion, range finding, remote sensing and optical time domain reflectometer. To improve the peak power of Q-switched fiber laser is what we pursue, and to know the factors that influence the peak power is what we should make clear first. In this paper, certain essential factors that influence the peak power are presented, with their theoretical basis clarified, which may be helpful to the design of the kindred Q-switched fiber lasers.

A Hybrid Q-switched Yb<sup>3+</sup>s-doped All-fiber Laser Based on the Acousto-optic Q-switch and SBS Effect

“…The configuration of this source makes it very suitable in some kindred systems. This research is the continuity of our earlier works [17][18][19][20][21][22][23].…”

Between ethylene and polyenes - the non-adiabatic dynamics of cis-dienes

“…54,57 Despite the inability to directly locate this dark state in absorption spectroscopy, several time-resolved studies have invoked non-adiabatic transitions involving it to explain the sub 200 fs dynamics observed in ion-and photoelectron signals subsequent to excitation to the bright (p,p * )-state. 23,58,59 The short timescales involved can also be inferred from the lack of detectable fluorescence of CPD, 60 further hinting at the involvement of a doubly excited state.…”

“…Numerous experimental studies have investigated the low-lying valence states in CPD [52][53][54][55][56][57] but only few have discussed the spectral position of the doubly excited state. 54,57 Despite the inability to directly locate this dark state in absorption spectroscopy, several time-resolved studies have invoked non-adiabatic transitions involving it to explain the sub 200 fs dynamics observed in ion-and photoelectron signals subsequent to excitation to the bright (p,p * )-state. 23,58,59 The short timescales involved can also be inferred from the lack of detectable fluorescence of CPD, 60 further hinting at the involvement of a doubly excited state.…”

“…This latter intersection, which was expected on the basis of experimental findings in ref. 57, leads to S 1 possessing the character of V 2 in some regions of the potential energy surface. To better visualize the connection between the initial FC geometry and the four MECIs, linearly interpolated potential energy surfaces have been calculated for geometries between these points of interest (see Fig.…”

Resonance Raman and hyper‐Raman spectroscopy of organic chromophores for second‐order nonlinear optics

“…Even when the molecules are oriented isotropically relative to the polarization of the exciting laser, the polarization properties of the scattered light are sensitive to the relative orientations of the molecular transition dipole moments if more than one transition contributes. Depolarization ratios in resonance Raman scattering have long been exploited to extract information about overlapping electronic transitions 26, 53–57, and the extension to resonance hyper‐Raman and hyper‐Rayleigh scattering presents some new opportunities. Of particular interest are molecules that consist of more than one nominally identical chromophore, such as those shown in Figures 12 and 13.…”