Abstract
The efficient operation of a TEA CO(2) laser wherein the parallel spark channel preioniser of the laser itself functioned as a switch is reported. Simultaneous closure of the parallel gaps without an external switch has been achieved by ballasting them with mutually coupled inductances. The repetitive operation capability of such a laser is also discussed.
Highlights
In the operation of a TEA CO2 laser, the energy initially stored in a condenser is discharged into the laser load with the help of a fast, high current, high voltage switch, conventionally a#75907 - $15.00 USD (C) 2007 OSAReceived 9 October 2006; revised 15 December 2006; accepted 19 December 2006 8 January 2007 / Vol 15, No 1 / OPTICS EXPRESS 129 spark gap or a thyratron
The condenser automatically switches its stored energy into the laser load when preconditioning of the inter-electrode gap with uv photons [4], X-rays [5], or electrons from an external source [6] brings down the impedance of the gap
No switch has been employed for the functioning of the main discharge, a switch is needed to initiate the preconditioning of the inter-electrode volume
Summary
In the operation of a TEA CO2 laser, the energy initially stored in a condenser is discharged into the laser load with the help of a fast, high current, high voltage switch, conventionally a. The condenser automatically switches its stored energy into the laser load when preconditioning of the inter-electrode gap with uv photons [4], X-rays [5], or electrons from an external source [6] brings down the impedance of the gap In all these methods, no switch has been employed for the functioning of the main discharge, a switch is needed to initiate the preconditioning of the inter-electrode volume. One obvious disadvantage here is that the entire discharge current flows through each of the spark channels This limits the life of the array and hinders the recovery of the gaps in the repetitive operation. In contrast to the case of switching the laser with a sequential preioniser, the discharge current in the switch is shared among number of parallel spark channels easing their process of recovery and enhancing, at the same time, the operational life of the preioniser
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