Narrowband telecom band polarization-entangled photon source by
superposed monolithic cavities
- URL: http://arxiv.org/abs/2402.18802v1
- Date: Thu, 29 Feb 2024 02:14:16 GMT
- Title: Narrowband telecom band polarization-entangled photon source by
superposed monolithic cavities
- Authors: Ming-Yuan Gao, Yin-Hai Li, Yan Li, Zhenghe Zhou, Guang-Can Guo,
Zhi-Yuan Zhou and Bao-Sen Shi
- Abstract summary: A polarization-entangled source in the telecom band is preferred to avoid frequency dispersion for long-distance transmission in optical fibers.
Here, we report narrowband, telecom-band, polarization-entangled photon pair generation based on the superposition of single-longitudinal-mode photon pairs.
The photon pairs generated from the cavities exhibit a high coincidence to accidental coincidence ratio of 20000 and a bandwidth below 500 MHz.
- Score: 2.054931047504406
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: A high-quality narrowband polarization-entangled source in the telecom band
is preferred to avoid frequency dispersion for long-distance transmission in
optical fibers and to efficiently couple with telecom band quantum memories.
Here, we report narrowband, telecom-band, polarization-entangled photon pair
generation based on the superposition of single-longitudinal-mode photon pairs
from two monolithic nonlinear crystal cavities in a passively stable
interferometer based on beam displacers. The photon pairs generated from the
cavities exhibit a high coincidence to accidental coincidence ratio of 20000
and a bandwidth below 500 MHz. Two-photon polarization interference,
Bell-inequality, and quantum state tomography are performed to indicate the
high quality of the entangled source. The current configuration demonstrates
greater stability than traditional free space cavity-enhanced
polarization-entangled state generation, which is promising for quantum
communication applications.
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