Effects of pump fluctuations on intensity noise of Nd:YVO4 microchip lasers
Laboratoire Kastler Brossel, Université Pierre et Marie Curie, Ecole Normale
Supérieure, CNRS, 4, Place Jussieu, 75252, Paris Cedex 05, France
2 LETI/CEA.G -DOPT, 17, rue des Martyrs, 38054, Grenoble Cedex 9, France
Published online: 13 August 2013
The principle of pump noise suppression is applied to a Nd:YVO4 microchip laser, optically pumped by laser diodes. The noise of the microchip laser at low frequency (below the relaxation oscillation frequency) is compared for noisy and amplitude squeezed laser diodes. The minimum intensity noise of the microchip laser is 7 dB above SNL at a frequency of 40 kHz. Very good agreement between experimental results and theoretical predictions of a model based on quantum Langevin equations is found.
PACS: 42.50.Dv – Nonclassical field states; squeezed, antibunched, and sub-Poissonian states; operational definitions of the phase of the field; phase measurements / 42.55.Xi – Diode-pumped lasers / 42.50.Lc – Quantum fluctuations, quantum noise, and quantum jumps
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 1999