Pump depletion in parametric down-conversion with low pump energies

• URL: http://arxiv.org/abs/2003.07483v2
• Date: Mon, 20 Apr 2020 15:18:22 GMT
• Title: Pump depletion in parametric down-conversion with low pump energies
• Authors: Jefferson Fl\'orez, Jeff S. Lundeen, Maria V. Chekhova
• Abstract summary: We report the efficient generation of high-gain parametric down-conversion, including pump depletion, with pump powers as low as 100 $mu$W. In our simple configuration, the pump beam is tightly focused into a bulk periodically poled lithium niobate crystal placed in free space.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We report the efficient generation of high-gain parametric down-conversion, including pump depletion, with pump powers as low as 100 $\mu$W (energies $0.1$~$\mu$J/pulse) and conversion efficiencies up to 33\%. In our simple configuration, the pump beam is tightly focused into a bulk periodically poled lithium niobate crystal placed in free space. We also observe a change in the photon number statistics for both the pump and down-converted beams as the pump power increases to reach the depleted pump regime. The experimental results are a clear signature of the interplay between the pump and the down-converted beams in highly efficient parametric down-conversion sources.

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