Salwa Marwan Salih, and Shelan Khasro Tawfeeq

Design and Numerical Analysis of 45-degree Polarization Rotator for Quantum Cryptography

Polarization manipulation in visible wavelengths has an important role in many applications, such as free-space quantum communication and quantum cryptography. In this study, a polarization rotator based on a tilted slot waveguide by 45-degree is proposed and designed. Its principle is to rotate a +45°/-45° input polarized light to TM0/TE0 output polarized light. The simulation results show an extinction ratio of 45.23 (41.17) dB and insertion loss below 0.62 dB at 700 nm wavelength. The bandwidth for an extinction ratio higher than 20 dB is 40 nm. In addition, the device tolerance is analyzed.

Reference:

DOI: 10.36244/ICJ.2026.2.4

Download 

Please cite this paper the following way:

Salwa Marwan Salih, and Shelan Khasro Tawfeeq "Design and Numerical Analysis of 45-degree Polarization Rotator for Quantum Cryptography", Infocommunications Journal, Vol. XVIII, No 2, June 2026, pp. 27-31., https://doi.org/10.36244/ICJ.2026.2.4