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
