Performance of a 80W copper vapor laser with “alignment free” unstable CAT-EYE resonator and other configurations using intra-cavity apertures

Singh, Brij Mohan; Daultabad, S. R.; Subramaniam, V. V.; Chakraborty, Akshoy Kumar

doi:10.1016/j.optcom.2008.09.066

Cited by 15 publications

(11 citation statements)

References 37 publications

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“…(3) The increased trend in enhancement with hydrogen additive in CVLs as established here is promising and may reduce the gap in performances (efficiency and power) of CVLs and KE-CVLs which are based on HCl + H 2 additives in buffer gas [8][9][10].…”

Section: Resultsmentioning

confidence: 93%

“…The CVL technology has undergone rapid and significant changes since its first demonstration by Walter et al in 1966 [1]. Since then, major technological advancements such as large-bore CVLs and power-enhanced CVLs with additives have been reported from various laboratories and also by us [1][2][3][4][5][6][7][8][9][10][11]. Standard CVLs using C-C transfer circuits and pure neon as buffer gas, though simple in design and construction, offer low output power and efficiency which limits their various applications.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced performance of a wide-aperture copper vapour laser with hydrogen additive in neon buffer gas

et al. 2010

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A wide-aperture copper vapour laser was demonstrated at ∼10 kHz rep-rate with hydrogen additive in its buffer gas. Maximum power in excess of ∼50 W (at 10 kHz) was achieved by adding 1.96% hydrogen to the neon buffer gas at 20 mbar total gas pressure. This increase in output power was about 70% as compared to ∼30 W achieved with pure neon at 5.5 kHz rep-rate. The 70% enhancement achieved was significantly higher than the maximum reported value of 50% so far in the literature. The enhancement was much higher (about 150%) as compared to its 20 W power at 10 kHz rep-rate using pure neon as the standard CVL operation.

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Section: Resultsmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Enhanced performance of a wide-aperture copper vapour laser with hydrogen additive in neon buffer gas

et al. 2010

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“…The present day CVLs are mostly converted to function as kinetically enhanced CVLs by incorporating suitable changes in the buffer gas mixtures, ensuring high efficiency, and rep-rate as compared to standard elemental CVLs based on pure neon as buffer gas. [9][10][11][12][13][14] The KE-CVL used with MASSP was based on 60 mm bore discharge tube with inter-electrode separation of about 155 cm. Online compact and rugged HCl generator was provided to ensure KE mode of operation as and when required.…”

Section: B the Kinetically Enhanced Copper Vapor Lasermentioning

confidence: 99%

New multiplexed all solid state pulser for high power wide aperture kinetically enhanced copper vapor laser

Ghodke

Muralikrishnan

Singh

2013

Review of Scientific Instruments

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A novel multiplexed scheme is demonstrated to combine two or more pulsed solid state pulsers of moderate capabilities. Pulse power supply comprising of two solid state pulsers of ~6 kW rating each in multiplexed mode with common magnetic pulse compression stage was demonstrated and optimized for operating with a wide aperture kinetically enhanced copper vapor laser. Using this new configuration, the multiplexed pulsed power supply was capable of operating efficiently at net repetition-rate of ~13 kHz, 12 kW (wall plug average power), 18-20 kV discharge voltage and pulse rise-time of ~80 ns. The laser under multiplexed configuration delivered un-interrupted output power of about ~80 W with scope of further increase in laser output power in excess of 100 W.

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“…1 The CVL systems are most reliable, rugged, efficient, and popular now in their various design configurations. 1, [8][9][10][11][12][13][14] Notable configurations are: large-bore CVLs, copper halide lasers (CuCl, CuBr, and CuHyBrID), and kinetically enhanced (KE) CVLs, which have made them attractive for various applications. Of these the kinetically enhanced CVLs have gained substantial importance in recent past due to their unique capability of 2-3 times increase in output power and efficiency by simply using a special buffer gas mixture without drastic change in design and circuitry.…”

Section: Introductionmentioning

confidence: 99%

“…The KE-CVLs are basically extension of standard high temperature elemental CVLs with provision of HCl vapors in the buffer gas mainly for removing excess electrons from the discharge medium resulting in dramatic increase in laser power and efficiency. [8][9][10][11][12][13][14][15] Kinetically enhanced copper vapor laser require external supply of HCl vapors mainly from specially designed online HCl generator, to supply mild concentrations (∼0.2%-0.5%) of HCl vapors into the discharge medium as part of the buffer gas mixture (Ne + H 2 ). This HCl generator is normally in the form of an externally a) Electronic addresses: bsingh@rrcat.gov.in and singhbijendra.phy@gmail.…”

Section: Introductionmentioning

confidence: 99%

Efficient copper vapor laser using metal (Cu, Ag) chlorides in thermal insulation and performance with new prism resonator configurations

Singh

2012

Review of Scientific Instruments

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A copper vapor laser based on the use of copper chloride and silver chloride mixture embedded inside the laser head thermal insulation is successfully demonstrated. The use of external HCl generator cell containing zirconium chloride normally used for its kinetically enhanced mode of operation is completely eliminated. With this new configuration laser power of ~70 W was achieved from a wide aperture ~47-50 mm bore discharge tube with input power of ~5 kW and overall high efficiency of ~1.4% without external supply of HCl vapors to the laser head. In a typical operational cycle the laser initially operates as low temperature CuCl laser with startup time of few minutes and output power of ~10 W during low tube temperature range of ~300-500 °C. Thereafter, the laser transforms itself into efficient kinetically enhanced copper vapor laser (CVL) at high temperature range of ~1200-1600 °C with maximum laser output power of ~70 W. This dual mode of operation observed in a single CVL system is unique and has not been reported so far in any high temperature copper vapor laser. New resonator configurations, namely, the prism resonator in stable and unstable form are successfully demonstrated for the first time in a copper vapor laser to achieve low divergence beam with dramatic increase in misalignment tolerance to ~25 mrad, which is an improvement of about ~50 times compared to standard CVLs with conventional spherical or plane-plane resonators. With these new resonator configurations the CVL functions almost as an "alignment free laser" system with significantly reduced beam divergence of ~0.2 mrad and high optical extraction efficiency of ~70%-80%.

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Performance of a 80W copper vapor laser with “alignment free” unstable CAT-EYE resonator and other configurations using intra-cavity apertures

Cited by 15 publications

References 37 publications

Enhanced performance of a wide-aperture copper vapour laser with hydrogen additive in neon buffer gas

Enhanced performance of a wide-aperture copper vapour laser with hydrogen additive in neon buffer gas

New multiplexed all solid state pulser for high power wide aperture kinetically enhanced copper vapor laser

Efficient copper vapor laser using metal (Cu, Ag) chlorides in thermal insulation and performance with new prism resonator configurations

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