A 25-W longitudinal, discharge-heated copper vapor laser

Wang, T. C.; Yang, C. Y.; Lee, W. S.; Hwang, Yi Yuh; Shea, M. W.; Luoh, F. B.; Chen, C. H.; Chen, M.; Luo, Hui-Ying

doi:10.1063/1.1140531

Cited by 3 publications

(2 citation statements)

References 2 publications

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“…A 25 W average power, water-cooled copper vapour laser tube (42 mm diameter, 1.5 m long) is used for the studies. The constructional details are similar to those mentioned in [7]. The laser was operated with neon as the buffer gas at 2.2 kPa tube pressure and the flow rate is maintained at around 0.5 l atm h −1 .…”

Section: Experimental Set-upmentioning

confidence: 99%

“…These studies are important to optimize the pulse excitation circuits along with the laser. Efficiency studies on copper vapour lasers report either its wall plug efficiency or the efficiency of the pulse excitation circuits alone [5,7,8]. But these studies do not reveal the temporal energy deposition pattern and energy deposition efficiency in the laser tube.…”

Section: Introductionmentioning

confidence: 99%

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Energy deposition studies in a copper vapour laser under different pulse excitation schemes

Nakhe

Rajanikanth

Bhatnagar

2003

Meas. Sci. Technol.

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A copper vapour laser is a gas discharge laser that requires fast, high-voltage, high-repetition-rate excitation pulses. In this paper, energy deposition studies in a typical copper vapour laser are reported under various pulse excitation schemes and under different operating conditions of the laser. The energy deposited in the laser tube is calculated by processing the measured voltage and current waveforms on the laser tube. This method has advantages over the calorimetric measurement method because it gives time-resolved energy deposition in the laser tube during the excitation pulse. Three different charge transfer circuits are used for pulse excitation: one is based on a thyratron switch, the second one on a magnetic pulse compressor switch and the third one on an insulated-gate bipolar transistor assisted by a magnetic pulse compressor. From studies of these circuits, it is found that the conventional thyratron-based capacitor-to-capacitor charge transfer circuit has the highest overall efficiency of energy deposition but it has the lowest energy deposition efficiency in the initial 100 ns of the pulse.

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Section: Experimental Set-upmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Energy deposition studies in a copper vapour laser under different pulse excitation schemes

Nakhe

Rajanikanth

Bhatnagar

2003

Meas. Sci. Technol.

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Large-bore copper vapor laser with a double thyratron pulse modulator

Singh

Nakhe

Mittal

et al. 1993

Review of Scientific Instruments

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An investigation into the output characteristics of a discharge-heated copper vapor laser

Wang

Yang

1989

Journal of Applied Physics

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The laser output characteristics, such as the pulse width, peak power, pulse energy, and average power of a discharge-heated copper vapor laser, which has a discharge tube of inner diameter 4.2 cm and length 150 cm, are investigated under such conditions as the charging voltage of 14.5 kV, laser tube temperature of 1450 °C, pulse repetition rate range from 0.5 to 9.5 kHz, and buffer gas pressures of 20 and 75 Torr. Comparing the widths of the laser pulses obtained at the buffer gas of 20 Torr with that obtained at 75 Torr, it is found that the rates of relaxation of metastable atoms at these two buffer gas pressures are comparable, even though the cooling mechanisms of the electrons, the collisional deexcitation partners of metastable atoms, are different. From the dependencies of the pulse energy on the pulse repetition rate, it is found that the prepulse electron density should be higher than the value of 1013 cm−3 for efficient pumping of this laser. The dependencies of the average power on the pulse repetition rate also indicate that the output power can be increased if the pulse repetition rate is increased and the thermal insulation is optimized. This points to the possibility of improved laser output power at elevated pulse repetition rate.

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A 25-W longitudinal, discharge-heated copper vapor laser

Cited by 3 publications

References 2 publications

Energy deposition studies in a copper vapour laser under different pulse excitation schemes

Energy deposition studies in a copper vapour laser under different pulse excitation schemes

Large-bore copper vapor laser with a double thyratron pulse modulator

An investigation into the output characteristics of a discharge-heated copper vapor laser

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