Line broadening in an AM mode-locked TEA-CO2 laser

By means of injection mode-locking, we were able to measure the bandwidth limited pulse duration of an AM mode-locked TEA-CO2 laser for different laser-gas mixtures. From these measurements we confirm the theoretical relation between bandwidth and pulse duration. The bandwidth under laser discharge conditions is similar to that of the neutral gas

Pulse forming in an AM mode-locking hybrid TEA-CO2 laser

We performed an experimental study on the pulse forming mechanism in an AM mode-locked hybrid TEA-CO2 laser by means of “injection mode-locking”. The results show that bandwidth limited pulses will only be reached within a small - critical - range of parameters. Furthermore, under some stringent conditions, the pulse-widths obtained become comparable to the non-hybrid case. We demonstrate also that the relation between the pulse-width and the modulation-depth is not different from a non-hybrid AM mode-locked TEA-CO2 laser

Subnanosecond pulse measurements of 10.6 μm radiation with tellurium

Subnanosecond infrared pulses have been measured by noncollinear secondharmonic generation in tellurium. The method is very practical because due to the high refractive index the fine tuning of the phase matching is easily obtained by rotating the crystal around the optic axis