Author
Kuniyil, Hashir Puthiyapurayil, Durak, Kadir
Publication Date
2021-08-15
Publication Place
-
Elsevier
Subject
Nonlinear optics, Quantum communication, Quantum entanglement, Quantum optics, Spontaneous parametric down-conversion
Type
Periodical
Language
English
Digital
Yes
Manuscript
No
Library
Özyeğin University
Library Asset ID
0030-4018
Record ID
cc0203ce-ba4d-49ee-9133-e40e96e64a44
Library Location
Electrical & Electronics Engineering
Date
2021-08-15
Notes
TÜBİTAK
Sample Text
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
