Long-pulse transversely excited 12CO2 and 13CO2 lasers

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Abstract
A conventional, transversely excited CO2 discharge module is fitted with a pulse-forming network to produce current and laser pulses with a duration of ≥20 μs. Detailed measurements of laser pulse energies and small-signal gain coefficients are made for both 12CO2 and 13CO2 gas mixtures, and the results compared with a computer model. In the long-wavelength band, the two isotopes are found to give very similar performance; the ratio of gain coefficients is measured as 1.00±0.05, while the 12CO2 pulse energy exceeds that of 13CO2 by approximately 20%.