Performance of a self-switched TEA CO2 laser with multi/two/single spark channel preioniser

Patil, Gautam C.; Jonnalagadda, Padma Nilaya; Biswas, Dhruba J.

doi:10.1016/j.optcom.2011.07.003

Cited by 2 publications

(4 citation statements)

References 7 publications

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“…The CW laser power of 10s of kW, pulse energy of 100 s of J, electro-optic efficiency of 30 % and an excellent beam quality established this laser as the workhorse of laser-based industrial applications. In Indian context, a mature technology development programme of high-power pulsed and CW CO 2 laser exists [12][13][14][15] at RRCAT/BARC for applications in lasermatter interaction.…”

Section: Carbon Dioxide (Co 2 ) Lasermentioning

confidence: 99%

Gas Lasers

Dixit¹

2014

Springer Proceedings in Physics

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The field of gas lasers, started with the invention of He-Ne laser in 1961, has witnessed tremendous growth in terms of technology development, research into gaseous gain medium, resonator physics and application in widely diverse arenas. This was possible due to high versatility of gas lasers in terms of operating wavelengths, power, beam quality and mode of operation. In recent years, there is a definite trend to replace the gas lasers, wherever possible, by more efficient and compact solid-state lasers. However, for many industrial, medical and military applications, the gas lasers still rule the roost due to their high-power capabilities with good beam quality at specific wavelengths. This chapter presents a short review covering the operating principle, important technical details and application potential of all the important gas lasers such as He-Ne, CO 2 , argon ion, copper vapour, excimer and chemical lasers. These neutral atoms, ions and molecule gas lasers are discussed as per applicable electrical, chemical and optical excitation schemes. The optically pumped gas lasers, recently experiencing resurgence, are discussed in the context of far infrared THz molecular lasers, diode-pumped alkali lasers and optically pumped gas-filled hollow-core fibre lasers.

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Section: Carbon Dioxide (Co 2 ) Lasermentioning

confidence: 99%

Gas Lasers

Dixit¹

2014

Springer Proceedings in Physics

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“…The L-C inversion-based pulser circuit utilized to energize the self-switched laser has been discussed in detail in Ref. 20 and represented in Fig. 2.…”

Section: Laser Head and Excitation Circuitmentioning

confidence: 99%

“…[15][16][17][18][19][20][21][22] In this method, the preionising spark array, an integral part of the laser head, was made to serve the dual role; that of a switch as well as of a source of UV photons essential for the preconditioning of the inter-electrode volume. The sequential preionising spark array used in the initial stage of this study was constructed by segmenting the main spark gap into smaller adjustable gaps and then placing them in series along the length and to one side of the discharge.…”

Section: Introductionmentioning

confidence: 99%

“…21,22 Repetitive operation, which was the prime motivation for moving towards switchless configuration, has so far eluded us primarily due to the following reason. As the operating voltage of a switchless laser is governed by the preioniser gap length, 17 in order to have an independent control on the operating voltage of the laser and the composition of the laser gas mixture, the preionisation chamber is isolated from the main discharge by means of LiF windows 16,19,20 that offer high transmission to the UV photons in the 110-130 nm range known to cause effective photo preconditioning. 23 As the contaminated gas in the inter-electrode volume needs to be replenished between two successive pulses to obtain arcfree repetitive operation, 24 transverse gas flow configuration that allows quicker replenishment at low gas flow rates as compared to the longitudinal flow configuration, is desirable.…”

Section: Introductionmentioning

confidence: 99%

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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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Performance of a self-switched TEA CO2 laser with multi/two/single spark channel preioniser

Cited by 2 publications

References 7 publications

Gas Lasers

Gas Lasers

Repetitive operation of switchless transverse flow transversely excited atmosphere CO2 lasers

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