Repetitive transversely excited gas laser pulsers

Comparative study of spark pin-array and printed circuit board surface plasma pre-ionization systems for transversely excited atmospheric CO2 laser performance

“…Besides some * Author to whom any correspondence should be addressed. complicated considerations applied on the gas composition [1] as well as the discharge electrical circuit [2][3][4], these attempts have been mainly concerned with the main electrodes profile to enhance the uniform electric field within the electrodes space [5] and the pre-ionization methods in order to precondition the active medium gas [6]. Pre-ionization processes contribute very effectively to obtain a stable glow discharge by inducing a remarkable uniform electron density within the discharge volume prior to ignition of the main discharge.…”

Repetitive operation of switchless transverse flow transversely excited atmosphere CO2 lasers

“…Spark gaps, which operate in the arc mode, are unsuitable for repetitive applications as they suffer from recovery problem with increasing charging current. 6 Thyratrons, on the other hand, withstand much higher hold over current by virtue of their operation in the glow mode and are, therefore, preferred as switches in the repetitive operation of the laser. 7 Thyratrons are expensive and have limited life and therefore there is a growing interest in replacing them by all-solid-state-exciters in conjunction with magnetic pulse compression.…”

“…6 and related references therein]. Although such rotary spark gaps offer a viable alternative to thyratrons up to a certain repetition rate, 6 the moving mechanical part a) Electronic mail: lpt@barc.gov.in. is a major hindrance in the realization of high repetition rate operation.…”

Switching of a TEA CO2laser with its own UV emitting parallel spark channels

“…In the operation of a TEA CO 2 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 spark gap or a thyratron. Spark gaps, which operate in the arc mode, are unsuitable for repetitive applications as they suffer from recovery problem with increasing charging current [1]. Thyratrons, on the other hand, withstand much higher hold over current by virtue of their operation in the glow mode and are, therefore, preferred as switches in the repetitive operation of the laser [2].…”