Abstract

The future of integrated quantum photonics relies heavily on the ability to engineer refined methods for preparing the quantum states needed to implement various quantum protocols. An important example of such states is quantum-correlated photon pairs, which can be efficiently generated using spontaneous nonlinear processes in integrated microring-resonator structures. In this work, we propose a method for generating spectrally unentangled photon pairs from a standard microring resonator. The method utilizes interference between a primary and a delayed secondary pump pulse to effectively increase the pump spectral width inside the cavity. This enables on-chip generation of heralded single photons with state purities in excess of 99% without spectral filtering.

© 2018 Optical Society of America

Truly unentangled photon pairs without spectral filtering

Z. Vernon, M. Menotti, C. C. Tison, J. A. Steidle, M. L. Fanto, P. M. Thomas, S. F. Preble, A. M. Smith, P. M. Alsing, M. Liscidini, and J. E. Sipe
Opt. Lett. 42(18) 3638-3641 (2017)

High-spectral-purity photon generation from a dual-interferometer-coupled silicon microring

Yingwen Liu, Chao Wu, Xiaowen Gu, Yuechan Kong, Xinxin Yu, Renyou Ge, Xinlun Cai, Xiaogang Qiang, Junjie Wu, Xuejun Yang, and Ping Xu
Opt. Lett. 45(1) 73-76 (2020)

Photonic crystal waveguides as sources of counterpropagating factorizable biphoton states

Sina Saravi, Thomas Pertsch, and Frank Setzpfandt
Opt. Lett. 44(1) 69-72 (2019)

Spectrally separable photon-pair generation in dispersion engineered thin-film lithium niobate

C. J. Xin, Jatadhari Mishra, Changchen Chen, Di Zhu, Amirhassan Shams-Ansari, Carsten Langrock, Neil Sinclair, Franco N. C. Wong, M. M. Fejer, and Marko Lončar
Opt. Lett. 47(11) 2830-2833 (2022)

High spectro-temporal purity single-photons from silicon micro-racetrack resonators using a dual-pulse configuration

Ben M. Burridge, Imad I. Faruque, John G. Rarity, and Jorge Barreto
Opt. Lett. 45(14) 4048-4051 (2020)