"

Cookies ussage consent

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

I agree, do not show this message again.

The crystal length modulation for the entangled biphotons generated by SPDC

J. B. WANG1,2, H. B. LIN2,*

Affiliation

  1. College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
  2. Institute of Mechanical & Electrical Technology, Taizhou Vocational & Technical College, Taizhou 318000, China

Abstract

We demonstrate the quantum entanglement of the entangled biphotons generated by type II spontaneous parametric down-conversion(SPDC) through a nonlinear crystal with phase-matching conditions. We find that the shorter crystal length, makes the main mode be more obvious in the discrete Schmidt modes, and also the corresponding eigenvalues, Weight, and Schmidt Numbers. Hence, shortening of the length of the crystal can further simplify the selection of modes, slightly increase the frequency response range of the down-conversion process, and compress the temporal width of the pulse. Our research is helpful to generate the ultrashort entanglement biphotons in nonlinear optics..

Keywords

Biphotons, SPDC, Entanglement.

Submitted at: Sept. 21, 2023
Accepted at: April 10, 2024

Citation

J. B. WANG, H. B. LIN, The crystal length modulation for the entangled biphotons generated by SPDC, Journal of Optoelectronics and Advanced Materials Vol. 26, Iss. 3-4, pp. 83-90 (2024)