S. F. Tetsing Talla, J. Millo, S. Denis, C. Lacroûte, G. Goavec-Mérou, E. Rubiola, Y. Kersalé
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引用次数: 0
Abstract
In this work, we present a technique to control and reduce the residual amplitude modulation (RAM) in the cavity-stabilized laser, which is one of the main limitations of these systems. The RAM rises from polarization mismatch between electro-optic modulator (EOM) axis and polarizers implemented for the generation of the error signal by the Pound-Drever-Hall technique. Using digital control system, we have developed a simple and robust technique for an active reduction of the RAM acting on the temperature of the EOM in addition with a DC and high voltage applied accross the EOM crystal. We observe a reduction of the RAM to 0.25 ppm compatible with a fractional frequency stability in the low 1e−16 around 10s.
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