Spectral and temporal properties of type-II parametric down-conversion: The impact of losses during state generation
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866912552398618624 |
|---|---|
| author | Kopylov, Denis A. Stefszky, Michael Meier, Torsten Silberhorn, Christine Sharapova, Polina R. |
| author_facet | Kopylov, Denis A. Stefszky, Michael Meier, Torsten Silberhorn, Christine Sharapova, Polina R. |
| contents | In this paper, we theoretically study spectral and temporal properties of pulsed spontaneous parametric down-conversion (SPDC) generated in lossy waveguides. Our theoretical approach is based on the formalism of Gaussian states and the Langevin equation, which is elaborated for weak parametric down-conversion and photon-number-unresolved click detection. Using the example of frequency-degenerate type-II SPDC generated under pump-idler group-velocity-matching condition, we show how the joint-spectral intensity, mode structure, normalized second-order correlation function, and Hong-Ou-Mandel interference pattern depend on internal losses of the SPDC process. In addition, we propose a new method for the experimental determination of internal losses of nonlinear waveguides which is based on the measurement of the normalized second-order correlation functions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_08917 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Spectral and temporal properties of type-II parametric down-conversion: The impact of losses during state generation Kopylov, Denis A. Stefszky, Michael Meier, Torsten Silberhorn, Christine Sharapova, Polina R. Quantum Physics Optics In this paper, we theoretically study spectral and temporal properties of pulsed spontaneous parametric down-conversion (SPDC) generated in lossy waveguides. Our theoretical approach is based on the formalism of Gaussian states and the Langevin equation, which is elaborated for weak parametric down-conversion and photon-number-unresolved click detection. Using the example of frequency-degenerate type-II SPDC generated under pump-idler group-velocity-matching condition, we show how the joint-spectral intensity, mode structure, normalized second-order correlation function, and Hong-Ou-Mandel interference pattern depend on internal losses of the SPDC process. In addition, we propose a new method for the experimental determination of internal losses of nonlinear waveguides which is based on the measurement of the normalized second-order correlation functions. |
| title | Spectral and temporal properties of type-II parametric down-conversion: The impact of losses during state generation |
| topic | Quantum Physics Optics |
| url | https://arxiv.org/abs/2501.08917 |