Panchromatic Hollow Cathode Laser

S. C. Wang

doi:10.1117/12.958870

22 August 1980 Panchromatic Hollow Cathode Laser

S. C. Wang

Proceedings Volume 0232, 1980 Intl Optical Computing Conf II; (1980) https://doi.org/10.1117/12.958870
Event: 1980 Technical Symposium East, 1980, Washington, D.C., United States

Abstract

A single hollow cathode laser which emits twelve wavelengths at 3250, 4416, 5337, 5378, 6355, 6360, 7237, 7284, 8067, 8531, 8652, and 8878A from a mixture of He and Cd is described. Both single wavelength and simultaneous multi-wavelength cw laser action were obtained. The basic operating principle of this laser is described with particular emphasis on the various excitation mechanisms which lead to the realization of multi-spectral laser action. The laser tube employed has a modular design configuration with all metal and ceramic structure to ensure durable and reproducible operation. The typical laser performance under various He pressure, Cd density and excitation conditions is exemplified using the experimental results obtained from three-prime-color laser operation. From a 10 cm active length tube, the laser emits at least 10 mW in blue, 3.5 mW in green and 1.5 mW in red transitions individually. Simultaneous cw oscillation of these colors at total output power of about 30 mW is also demonstrated using a 25 cm active length tube. The laser power fluctuation is about 2 to 3 percent peak-to-peak with absence of discharge striation noise. Potential applications of this laser are briefly mentioned.

Citation Download Citation

S. C. Wang "Panchromatic Hollow Cathode Laser", Proc. SPIE 0232, 1980 Intl Optical Computing Conf II, (22 August 1980); https://doi.org/10.1117/12.958870

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