High-brightness Fiber Coupled Diode Laser Research Articles

Diode-pumped Yb:KGW laser with 73 fs pulse and 0.72 MW peak power based on Kerr-lens mode locking

We have demonstrated a high-power Kerr-lens mode-locked Yb:KGW oscillator with an additional Kerr medium pumped by a high-brightness fiber-coupled diode laser. Operated at the repetition rate of 75.5 MHz, the laser delivers 73 fs pulse duration with average output power of 4.05 W, and the corresponding pulse energy is 53 nJ and the peak power is 0.72 MW, respectively. The output power is recorded to be stable with a fluctuation of less than 0.65% rms within 0.5 h. This work is promising for a variety of applications in nonlinear frequency conversion and high-energy amplifiers.

基于双管的高亮度半导体激光器光纤耦合系统设计

基于双管的高亮度半导体激光器光纤耦合系统设计

基于像散与理想光源成像原理的高亮度半导体激光器光纤耦合设计方法

A high-brightness fiber-coupled diode laser system is designed,based on the principle of astigmatism and ideal light source imaging theory.As an example,details of the calculation methods and design steps of the fiber coupled laser diode are given whose wavelength is 808 nm and output power is 10 W.Semiconductor laser beam can be coupled into the 50 μm core diameter optical fiber with a numerical aperture of 0.22.It is found that this fiber-coupled system has an output power of 9.712 W,a coupling efficiency of 97.12% and a power density of 1.1224×106 W/cm2.The proposed method is simple in principle,and the designed fiber-coupled system has high coupling efficiency,small size and strong practical value.