Studies on the spectral purity of copper–hydrogen bromide laser radiations

Abstract

This paper presents, for the first time to the best of our knowledge, the linewidth, frequency, and stability characteristics of a copper-HBr laser. These spectral purity attributes were found to be critically linked with the electrical input power and HBr concentration, unlike that of the optical resonator. Variation in green and yellow radiation linewidths from 4 to 4.5 GHz and from 6.5 to 8.8 GHz, linewidth fluctuations from 50 to 150 MHz and from 60 to 530 MHz as well as frequency fluctuations from 10 to 100 MHz and from 410 to 10 MHz were observed when varying the input power and HBr concentration. These results are comprehensively analyzed in terms of isotopic shift, hyperfine splitting, line broadening, and temperature and gain distribution effects relevant to this laser.

Studies on high power second-harmonic deep-UV generation from a high repetition-rate Cu-HBr laser

“…These include efficient manufacturing of fibre gratings & other photonic components; UV-photolithography; micromachining of semiconductors/glass/ceramics/polymers; spectroscopy; and biology/genetics/medicine [1][2][3][4][5][6]. Among the limited choices available, the UV source (λ ≈ 255.3 nm) based on second harmonic generation (SHG) of copper vapour laser (CVL) radiation (λ ≈ 510.6 nm) is advantageous owing to its higher PRR and excellent spatio-temporal & spectral beam quality attributes as compared to that of excimer lasers and frequency quadrupled solid state lasers [3][4][5][6][7][8].…”

Laser Systems for Distant Monitoring of Nanopowder Combustion

“…Gaseous metal vapor active media have unique characteristics such as narrow natural bandwidth of amplification, high single pass gain, high pulse repetition frequency, operation in the visible spectral region, high average power and ability to control laser radiation parameters [18][19][20][21][22][23][24][25][26], which make them appropriate for use as brightness amplifiers in laser monitors. These imaging systems allow observation through the flame or plasma and visualization of the processes shielded by intensive background lighting.…”

High-Speed Visualization of Nanopowder Combustion in Air

“…Gaseous metal vapor active media have unique characteristics such as high single pass gain, high pulse repetition frequency, operation in a visible spectral region, high average power and ability to control laser radiation parameters [10][11][12][13][14][15]. This makes these media appropriate for use as brightness amplifiers in laser projection microscopes and laser monitors [16][17][18][19][20].…”