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G. Kazakov, Thorsten Schumm:
"Towards active optical standard based on a bad-cavity superradiant laser: challenges and approaches";
Poster: DPG-Frühjahrstagung, Heidelberg (invited); 2015-03-23 - 2015-03-27.

An active optical frequency standard, where the atomic ensemble itself produces a highly stable and accurate frequency signal, is a promising source of ultranarrow coherent laser radiation. The short-time frequency stability of such standards may overcome the stability of lasers stabilized to macroscopic cavities which are used as local oscillators in the modern optical frequency standard systems. The main idea is to create a ``superradiant" laser operating deep in the bad cavity regime, where the decay rate of the cavity field significantly exceeds the decoherence rate of the lasing transition. This idea is actively studied in several groups, although the metrology relevant level of short-time frequency stability is still not achieved. We consider different approaches towards the realization of an active optical frequency standard, and discuss the required parameters of atomic ensembles. Also we consider different theoretical methods of describing of such standards.

Active frequency standard, bad-cavity laser

http://publik.tuwien.ac.at/files/PubDat_245717.pdf