Abstract
The study, reliable generation, and application of spectral and polarization-correlated biphotons is a widely researched area in the field of quantum technology. In this Letter, we report a bright narrowband source of spectral and polarization-correlated orthogonal photon-pairs around the telecom wavelength of 1560 nm from a fiber-pigtailed, type-II quasi-phase-matched, MgO-doped periodically poled lithium niobate (MgO:ppLN) ridge waveguide. We achieved a high spectral brightness of $\thicksim$5×106 photon pairs/s/mW/nm with a coincidence-to-accidental ratio (CAR) value of $\thicksim$427 and an emission bandwidth of $\thicksim$2.4 nm. Owing to its compact and narrowband nature, this source can reliably be used in commercial quantum communication systems for long-distance transmissions. The generation of such high rates of correlated orthogonal twin photons from a fully guided type-II SPDC-based source has not been thoroughly investigated to the best of our knowledge.
© 2024 Optica Publishing Group
Full Article | PDF ArticleMore Like This
Vikash Kumar Yadav, Vivek Venkataraman, and Joyee Ghosh
Opt. Lett. 47(19) 5132-5135 (2022)
Omshankar, Vivek Venkataraman, and Joyee Ghosh
Opt. Express 32(3) 3470-3479 (2024)
Changjia Chen, Calvin Xu, Arash Riazi, Eric Y. Zhu, Alexey V. Gladyshev, Peter G. Kazansky, and Li Qian
Opt. Lett. 46(6) 1261-1264 (2021)