1 October 1991 Research on an optically FIR-ringlaser
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Proceedings Volume 1576, 16th International Conference on Infrared and Millimeter Waves; 15761L (1991) https://doi.org/10.1117/12.2297770
Event: 16th International Conference on Infrared and Millimeter Waves, 1991, Lausanne, Switzerland
Abstract
Very little research on optically pumped FIR-ringlasers has been reported in the past, despite the fact that such lasers have proven to be more stable FIR-monochromatic sources than the usual standing wave resonator types (Heppner, Weiss 1978).

The ringlaser offers much better isolation between the pump and the FIR-laser due to the elimination of interaction between the two. This is similar to pumped dye ringlasers in the visible part of the EM-spectrum.

Unlike most ringlasers in the visible range unidirectional emission is a general feature of FIR-ringlasers. Hence an optical diode is not required to suppress simultaneous bidirectional operation.
© (1991) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
H. K. E. Stadermann, "Research on an optically FIR-ringlaser", Proc. SPIE 1576, 16th International Conference on Infrared and Millimeter Waves, 15761L (1 October 1991); doi: 10.1117/12.2297770; https://doi.org/10.1117/12.2297770
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