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10 May 2007 Ultra-low photon defect diode-pumped cryo-cooled Er:YAG laser
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Efficient ultra-low-photon-defect resonantly diode-pumped Er:YAG cryogenically-cooled laser is demonstrated for the first time. Quasi-CW diode pumping by InGaAsP/InP 10-diode bar stack (without spectral narrowing) was implemented. Laser performance at ~80°K in this first experiment was found to be 71.5% efficient (output power versus power absorbed in the cavity mode, slope). Er:YAG laser output variations with the gain medium temperature was investigated. Maximum quasi-CW power of ~65 W was achieved by optimization the gain medium operating temperature. and to photon number splitting attacks, thus resulting in a high efficiency in terms of distilled secret bits per qubit. After having successfully tested the feasibility of the system [3], we are currently developing a fully integrated and automated prototype within the SECOQC project [4]. We present the latest results using the prototype. We also discuss the issue of the photon detection, which still remains the bottleneck for QKD.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
M. Dubinskii, N. Ter-Gabrielyan, G. A. Newburgh, and L. D. Merkle "Ultra-low photon defect diode-pumped cryo-cooled Er:YAG laser", Proc. SPIE 6552, Laser Source Technology for Defense and Security III, 65520M (10 May 2007);


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