Phase correlation of laser waves with arbitrary frequency spacing

Details Phase correlation of laser waves with arbitrary frequency spacing Phase correlation of laser waves with arbitrary frequency spacing

2004-04-20

arxiv.org/abs/quant-ph/0404112v1

Physics

Quantum Physics

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.93.223601

The theoretically predicted correlation of laser phase fluctuations in Lambda-type interaction schemes is experimentally demonstrated. We show, that the mechanism of correlation in a Lambda scheme is restricted to high frequency noise components, whereas in a double-$\Lambda$ scheme, due to the laser phase locking in closed-loop interaction, it extends to all noise frequencies. In this case the correlation is weakly sensitive to coherence losses. Thus the double-Lambda scheme can be used to correlate e.m. fields with carrier frequency differences beyond the GHz regime.

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