Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Measuring the entanglement of photons produced by a nanosecond pulsed source

Not Accessible

Your library or personal account may give you access

Abstract

A source of entangled photons based on well-separated laser pump pulses (PDs) with a duration in the nanosecond range may be useful in many applications. Yet, such a source has intrinsic problems arising from the simultaneous arrival of signal and noise photons to the detectors, which makes the methods unsuitable for dealing with accidental (or spurious) coincidences applied in the continuous-wave or mode-locked pump regimes. Those problems are analyzed, and practical methods to calculate the number of accidental coincidences are described and experimentally checked. These methods are useful not only to measure entanglement, but also in every situation where extracting the number of valid two-photon coincidences from noisy data generated by such a pulsed process is required. As an original example of the use of these methods, we present the time-resolved measurement of the concurrence of the field produced by spontaneous parametric downconversion with PDs of duration in the ns range at a repetition of kHz.

© 2014 Optical Society of America

Full Article  |  PDF Article
More Like This
Efficient heralding of polarization-entangled photons from type-0 and type-II spontaneous parametric downconversion in periodically poled KTiOPO4

Fabian Steinlechner, Marta Gilaberte, Marc Jofre, Thomas Scheidl, Juan P. Torres, Valerio Pruneri, and Rupert Ursin
J. Opt. Soc. Am. B 31(9) 2068-2076 (2014)

Pulsed Sagnac polarization-entangled photon source with a PPKTP crystal at telecom wavelength

Rui-Bo Jin, Ryosuke Shimizu, Kentaro Wakui, Mikio Fujiwara, Taro Yamashita, Shigehito Miki, Hirotaka Terai, Zhen Wang, and Masahide Sasaki
Opt. Express 22(10) 11498-11507 (2014)

Multipartite entanglement generation via ultrashort pulse

Qizhi Guo, Chaoying Zhao, and Weihan Tan
J. Opt. Soc. Am. B 28(9) 2240-2247 (2011)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (5)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (22)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved