Broadband Fiber-based Entangled Photon Pair Source at Telecom O-band
- URL: http://arxiv.org/abs/2102.12632v1
- Date: Thu, 25 Feb 2021 02:01:14 GMT
- Title: Broadband Fiber-based Entangled Photon Pair Source at Telecom O-band
- Authors: Changjia Chen, Calvin Xu, Arash Riazi, Eric Y. Zhu, Alexey V.
Gladyshev, Peter G. Kazansky, Li Qian
- Abstract summary: Biphotons generated from type-II SPDC are polarization-entangled over the entire emission bandwidth.
Biphoton source provides the broadest bandwidth entangled biphotons at O-band to our knowledge.
- Score: 0.3463527836552467
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: In this letter, we report a polarization-entangled photon-pair source based
on type-II spontaneous parametric down conversion at telecom O-band in
periodically poled silica fiber (PPSF). The photon-pair source exhibits more
than 130 nm (~24 THz) emission bandwidth centered at 1306.6 nm. The broad
emission spectrum results in a short biphoton correlation time and we
experimentally demonstrate a Hong-Ou-Mandel interference dip with a full width
of 26.6 fs at half maximum. Owing to the low birefringence of the PPSF, the
biphotons generated from type-II SPDC are polarization-entangled over the
entire emission bandwidth, with a measured fidelity to a maximally entangled
state greater than 95.4%. The biphoton source provides the broadest bandwidth
entangled biphotons at O-band to our knowledge.
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