Multiline CO2 lasers and their uses

Biswas, Dhruba J.; Nath, Ashish Kumar; Nundy, U.; Chatterjee, U.

doi:10.1016/0079-6727(90)90005-i

Cited by 18 publications

(5 citation statements)

References 112 publications

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“…Such value was obtained using the focal length divergence measurement method. The spectral line of the constructed laser was monitored by a CO 2 laser spectrum analyzer (Macken Instruments, 16 A) and, as is expected for TEA CO 2 lasers [18], it has been shown that it oscillates constantly on 10P(20) rotational line with 10.59 µm wavelength. Further, a photon drag (THORLABS PM100D) connected to a storage oscilloscope (Tektronix, TDS 2022B) have been used to trace the temporal shape of the laser pulses, typically shown in figure 4.…”

Section: Resultsmentioning

confidence: 78%

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

Torabi¹,

Silakhori²,

Nejhad³

2021

Laser Phys.

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The performance of a homemade transversely excited atmospheric CO2 laser, capable to be alternatively run using UV spark pin-array (SPA) and printed circuit board (PCB) surface plasma pre-ionization systems, is comparatively studied. The pin-array configuration is comprised of two rows of 5 mm spark gaps symmetrically located on either side of the discharge volume. The surface plasma pre-ionization system consists of a PCB of which, one side is patterned with isolated millimeter size circular pieces. The performance of both types of pre-ionization in different working conditions was experimentally investigated and the output energies were compared with each other as well as the simulation results based on the six-temperature vibrational-rotational model. It has been found that the SPA system provides better discharge stability and uniformity with higher output energies, while using the PCB surface plasma configuration allowed the laser to operate with higher gas lifetime and lowered the need for helium in its gas mixture.

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Section: Resultsmentioning

confidence: 78%

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

Torabi¹,

Silakhori²,

Nejhad³

2021

Laser Phys.

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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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“…Several techniques for multiline operation of pulsed CO 2 lasers have been so far developed and reported (Biswas 1990; Gupta and Chatterjee 1990;Wang et al 2009;Churakov et al 1987;Ruschin et al 1985;Chongyi et al 1984) among which, the spatial separation of optical paths technique is the only one with non-overlapping paths for different lines in the active medium. In all of the other techniques, however, the active medium is communally used by two or more oscillating lines, resulting in lasing under gain competition due to a same laser upper lever for whole of the oscillating lines.…”

Section: Introductionmentioning

confidence: 99%

Temporal controlling of a bifurcated dual-band two-line TEA CO2 laser

et al. 2015

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The influence of N 2 and He ratios in laser gas mixture on the pulse shape and onset delay time of the 10P(20) and 9P(20) lines in a bifurcated dual-band two-line TEA CO 2 laser was investigated. It was shown that the pulse shape as well as delay in onset time of 9P(20) line is strongly dependent on the ratios of N 2 and He components. So that, duration and onset delay time of the 9P(20) line can be respectively controlled in 100-400 ns range and 0.1 up to several ls, by varying the N 2 :He ratio in the gas mixture.

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Multiline CO2 lasers and their uses

Cited by 18 publications

References 112 publications

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

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

Gas Lasers

Temporal controlling of a bifurcated dual-band two-line TEA CO2 laser

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Multiline CO2 lasers and their uses

Cited by 18 publications

References 112 publications

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

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

Gas Lasers

Temporal controlling of a bifurcated dual-band two-line TEA CO2 laser

Contact Info

Product

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

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