A highly efficient electron beam controlled switchless multi-joule TEA CO2 laser

Singal, Vikas; Vijayan, Rajasree; Narayan, B. S.; Biswas, Dhruba J.; Nundy, U.

doi:10.1016/s1350-4495(02)00174-3

Cited by 8 publications

(7 citation statements)

References 13 publications

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“…[11][12][13][14] In these methods the main discharge condenser, which is charged to a voltage lower than the dc breakdown voltage of the inter-electrode gap, is connected across the laser electrodes without a switch. The condenser automatically switches its stored energy into the laser load when preconditioning of the inter-electrode gap with UV photons, 11 x-rays, 12 electrons from an external source 13 or a low energy spiker discharge 14 brings down the impedance of the gap.…”

Section: Introductionmentioning

confidence: 99%

Repetitive operation of switchless transverse flow transversely excited atmosphere CO2 lasers

Patil

Nilaya

Biswas

2011

Review of Scientific Instruments

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The enhanced preionisation efficiency of a mutually coupled parallel spark preioniser has been exploited to achieve switchless operation of a transversely excited atmosphere (TEA) CO(2) laser in the conventional transverse gas flow configuration. This made the laser more compatible to repetitive operation and the satisfactory performance of a switchless TEA CO(2) laser of ~8 cc active volume is reported here up to a maximum repetition rate of 100 Hz at a gas replenishment factor of ~2.

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Section: Introductionmentioning

confidence: 99%

Repetitive operation of switchless transverse flow transversely excited atmosphere CO2 lasers

Patil

Nilaya

Biswas

2011

Review of Scientific Instruments

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“…Electrical discharge is a convenient method for pumping of the laser medium. We had earlier worked on E-beam sustained discharges [3], and find this technique useful for the excitation of large aperture, low pressure, He-rich mixture employed for this laser. The advantages of E-beam-sustained discharges are explained below.…”

Section: Introductionmentioning

confidence: 99%

Generation of 13.9 µm radiation from CO2 by cascade lasing or externally applied CO2 laser

Nundy¹

2010

Pramana - J Phys

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13.9 µm radiation from the 10 0 0-01 1 0 transition can be obtained from a CO 2 laser by saturating the 00 0 1-10 0 0, 10.6 µm transition with an internally generated q-switched pulse or by the application of an external 10.6 µm pulse. Because of Fermi resonance between the symmetric stretch and the bending modes, decay of population from the 10 0 0 level is fast, and such lasers operate at low power and energies. A theoretical model was developed to study such lasers. The results of the calculations indicate that a large-aperture E-beam-sustained discharge is effective for excitation of the cryogenically cooled gain medium, which uses He rich mixture at low pressure. The system is scalable and capable of generating large powers and energies.

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“…Although such systems have long life and high degree of reliability, they are bulky and also suffer from low wall plug efficiency [3]. Efforts have, therefore, been expended in the past to eliminate the main discharge switch altogether in the operation of TEA CO 2 lasers [4][5][6]. In these methods the main discharge condenser, which is charged to a voltage lower than the d-c breakdown voltage of the inter-electrode gap, is directly connected across the laser electrodes.…”

Section: Introductionmentioning

confidence: 99%

“…In these methods the main discharge condenser, which is charged to a voltage lower than the d-c breakdown voltage of the inter-electrode gap, is directly connected across the laser electrodes. 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, although 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.…”

Section: Introductionmentioning

confidence: 99%

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

Nilaya¹,

Raote²,

Patil³

et al. 2007

Opt. Express

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A highly efficient electron beam controlled switchless multi-joule TEA CO2 laser

Cited by 8 publications

References 13 publications

Repetitive operation of switchless transverse flow transversely excited atmosphere CO2 lasers

Repetitive operation of switchless transverse flow transversely excited atmosphere CO2 lasers

Generation of 13.9 µm radiation from CO2 by cascade lasing or externally applied CO2 laser

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

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A highly efficient electron beam controlled switchless multi-joule TEA CO2 laser

Cited by 8 publications

References 13 publications

Repetitive operation of switchless transverse flow transversely excited atmosphere CO2 lasers

Repetitive operation of switchless transverse flow transversely excited atmosphere CO2 lasers

Generation of 13.9 µm radiation from CO2 by cascade lasing or externally applied CO2 laser

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

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