Efficient coupling of down-converted photon pairs into single mode fiber

Name: Efficient coupling of down-converted photon pairs into single mode fiber
Author: Kuniyil, Hashir Puthiyapurayil, Durak, Kadir

İsim	Efficient coupling of down-converted photon pairs into single mode fiber
Yazar	Kuniyil, Hashir Puthiyapurayil, Durak, Kadir
Basım Tarihi:	2021-08-15
Basım Yeri	- Elsevier
Konu	Nonlinear optics, Quantum communication, Quantum entanglement, Quantum optics, Spontaneous parametric down-conversion
Tür	Süreli Yayın
Dil	İngilizce
Dijital	Evet
Yazma	Hayır
Kütüphane:	Özyeğin Üniversitesi
Demirbaş Numarası	0030-4018
Kayıt Numarası	cc0203ce-ba4d-49ee-9133-e40e96e64a44
Lokasyon	Electrical & Electronics Engineering
Tarih	2021-08-15
Notlar	TÜBİTAK
Örnek Metin	We present the analysis of the down-conversion emission profile from a critically phase-matched type-I nonlinear crystal. The emission profile of the down-conversion modes shows asymmetry in cylindrical coordinate system due to the birefringent effects of the nonlinear crystal, i.e. pump walk-off. This effect leads to reduced collection of the pairs from the source to the single mode fiber, which limits the brightness as a function of the crystal length. We propose a method to improve the symmetry of the down-conversion modes by inserting a lens off-centered with respect to the optical axis. Our theoretical and experimental results show that the asymmetry of the system increases with the crystal length by L0.5, and the brightness is proportional to crystal length by L0.72 and L0.91 for uncorrected and corrected down conversion mode profiles, respectively. The proposed method allows more efficient use of photon pair sources in terms of brightness which is to be used in quantum optics applications.
DOI	10.1016/j.optcom.2021.127038
Cilt	493

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Efficient coupling of down-converted photon pairs into single mode fiber

Yazar Kuniyil, Hashir Puthiyapurayil, Durak, Kadir

Basım Tarihi 2021-08-15

Basım Yeri - Elsevier

Konu Nonlinear optics, Quantum communication, Quantum entanglement, Quantum optics, Spontaneous parametric down-conversion

Tür Süreli Yayın

Dil İngilizce

Dijital Evet

Yazma Hayır

Kütüphane Özyeğin Üniversitesi

Demirbaş Numarası 0030-4018

Kayıt Numarası cc0203ce-ba4d-49ee-9133-e40e96e64a44

Lokasyon Electrical & Electronics Engineering

Tarih 2021-08-15

Notlar TÜBİTAK

Örnek Metin We present the analysis of the down-conversion emission profile from a critically phase-matched type-I nonlinear crystal. The emission profile of the down-conversion modes shows asymmetry in cylindrical coordinate system due to the birefringent effects of the nonlinear crystal, i.e. pump walk-off. This effect leads to reduced collection of the pairs from the source to the single mode fiber, which limits the brightness as a function of the crystal length. We propose a method to improve the symmetry of the down-conversion modes by inserting a lens off-centered with respect to the optical axis. Our theoretical and experimental results show that the asymmetry of the system increases with the crystal length by L0.5, and the brightness is proportional to crystal length by L0.72 and L0.91 for uncorrected and corrected down conversion mode profiles, respectively. The proposed method allows more efficient use of photon pair sources in terms of brightness which is to be used in quantum optics applications.

DOI 10.1016/j.optcom.2021.127038

Cilt 493