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Chinese Physics Letters

Cold Atom Cloud with High Optical Depth Measured with Large Duty Cycle

张骏, 顾振杰, 钱鹏, 韩枝光, J. F. Chen

Published Jan 1, 2015• 0 citations
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We present a cold atom system with a dark-line two-dimensional magneto-optical trap, to increase the atomic density by suppressing the atomic radiation pressure. Optical depth (OD) and duty cycle are used to evaluate the system performance. We demonstrate a 100% increase in OD with the dark line, and obtain an ultrahigh OD of 264 with 10% for the duty cycle. Also, with an efficient dark line region, the OD could maintain above 100 with duty cycle as high as 30%. The cold atomic ensemble with an ultrahigh OD with a 10%–30% duty cycle is particularly advantageous in quantum information processing and communication.