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Broadband fiber-based entangled photon-pair source at telecom O-band

Broadband fiber-based entangled photon-pair source at telecom O-band
Broadband fiber-based entangled photon-pair source at telecom O-band
In this Letter, we report a polarization-entangled photon-pair source based on type-II spontaneous parametric downconversion at telecom O-band in periodically poled silica fiber (PPSF). The photon-pair source exhibits more than 130 nm (∼24THz) 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.
0146-9592
1261-1264
Chen, Changjia
ab034b72-03b9-4e62-9815-bca04880b116
Xu, Calvin
2938e0a5-285a-482d-8226-cdad8bd06536
Riazi, Arash
e54caeb9-1266-4a98-82a4-d37969c9393f
Zhu, Eric Y.
a5837a40-5106-401b-b2a7-f7b421325d02
Gladyshev, Alexey V.
f178f1b2-c3fa-4b63-96e8-b6e356218b84
Kazansky, Peter
a5d123ec-8ea8-408c-8963-4a6d921fd76c
Qian, Li
3e26e957-afd2-407a-8fa8-6f15b0f70ea3
Chen, Changjia
ab034b72-03b9-4e62-9815-bca04880b116
Xu, Calvin
2938e0a5-285a-482d-8226-cdad8bd06536
Riazi, Arash
e54caeb9-1266-4a98-82a4-d37969c9393f
Zhu, Eric Y.
a5837a40-5106-401b-b2a7-f7b421325d02
Gladyshev, Alexey V.
f178f1b2-c3fa-4b63-96e8-b6e356218b84
Kazansky, Peter
a5d123ec-8ea8-408c-8963-4a6d921fd76c
Qian, Li
3e26e957-afd2-407a-8fa8-6f15b0f70ea3

Chen, Changjia, Xu, Calvin, Riazi, Arash, Zhu, Eric Y., Gladyshev, Alexey V., Kazansky, Peter and Qian, Li (2021) Broadband fiber-based entangled photon-pair source at telecom O-band. Optics Letters, 46 (6), 1261-1264. (doi:10.1364/OL.415409).

Record type: Article

Abstract

In this Letter, we report a polarization-entangled photon-pair source based on type-II spontaneous parametric downconversion at telecom O-band in periodically poled silica fiber (PPSF). The photon-pair source exhibits more than 130 nm (∼24THz) 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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O-band EPS v2 2020_11_23 - Accepted Manuscript
Restricted to Repository staff only until 9 February 2022.
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Accepted/In Press date: 9 February 2021
Published date: 4 March 2021

Identifiers

Local EPrints ID: 448932
URI: http://eprints.soton.ac.uk/id/eprint/448932
ISSN: 0146-9592
PURE UUID: 63235848-5faa-4917-ae75-136171201dc5

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Date deposited: 11 May 2021 16:48
Last modified: 28 May 2021 16:30

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Contributors

Author: Changjia Chen
Author: Calvin Xu
Author: Arash Riazi
Author: Eric Y. Zhu
Author: Alexey V. Gladyshev
Author: Peter Kazansky
Author: Li Qian

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