Abstract
The lasing at the third harmonic of the fundamental frequency, at a wavelength of about 70 μm, was recently achieved on Novosibirsk terahertz free electron laser. Choosing various optical resonator losses for the fundamental and third harmonics as well as the resonator length, one can force the lasing to occur at both the frequencies simultaneously or at either of them alone.
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Acknowledgements
This work was supported partly by the Russian Foundation For Basic Research (project 09-02-12121, 10-02-085-18).
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Kubarev, V.V., Kulipanov, G.N., Shevchenko, O.A. et al. Third Harmonic Lasing on Terahertz NovoFEL. J Infrared Milli Terahz Waves 32, 1236–1242 (2011). https://doi.org/10.1007/s10762-011-9788-3
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DOI: https://doi.org/10.1007/s10762-011-9788-3