Gas-Discharge He-Xe Fiber Laser

Towards Mid-Infrared Gas-Discharge Fiber Lasers

“…In that work, the He-Xe GDFL operating in steady-state conditions was studied, and the shape of the laser pulses was investigated as a function of gas pressure. Pulse shapes similar to those in Figure 3b were observed only when the gas pressure was above ~150 torr, and the slope was increasing with pressure up to self-termination of laser oscillations at pressures as high as 300 torr [33].…”

“…The negative slope of the laser pulses could indicate the excessive pressure inside the hollow core, as follows from our previous work [33]. In that work, the He-Xe GDFL operating in steady-state conditions was studied, and the shape of the laser pulses was investigated as a function of gas pressure.…”

“…The first question we studied was how the gas-discharge fiber laser starts to generate immediately after the pump pulses are applied to the gas-filled HCF. A gas mixture of He:Xe = 100:1 at a pressure of 120 torr was used for the laser emission at 2.03 µm to occur in optimal conditions for quasi-continuous operation [33]. The GDFL pulse peak power was measured as a function of time elapsed from the turning on of the magnetron (Figure 3a).…”

“…Progress in the generation of laser radiation inside an HCF has been achieved very recently by demonstrating the first GDFLs [32,33]. An MW slot antenna configuration enabled an electric field at a frequency of 2.45 GHz to be transversely applied to the HCF filled by He-Ar-Xe [32] or He-Xe [33] gas mixtures.…”

“…Progress in the generation of laser radiation inside an HCF has been achieved very recently by demonstrating the first GDFLs [32,33]. An MW slot antenna configuration enabled an electric field at a frequency of 2.45 GHz to be transversely applied to the HCF filled by He-Ar-Xe [32] or He-Xe [33] gas mixtures. As a result, not only was stable gas discharge observed, but laser generation was also achieved at the wavelength of 2.03 µm when cavity mirrors were placed at the ends of the HCF.…”