Telecom-band photon-pair source based on high-index doped silica glass spiral waveguide

Changyue Wang; Liang Cui; Hao Feng; Xiaoying Li

doi:10.1117/12.2689155

26 November 2023 Telecom-band photon-pair source based on high-index doped silica glass spiral waveguide

Changyue Wang, Liang Cui, Hao Feng, Xiaoying Li

Proceedings Volume 12775, Quantum and Nonlinear Optics X; 127750T (2023) https://doi.org/10.1117/12.2689155
Event: SPIE/COS Photonics Asia, 2023, Beijing, China

Abstract

We generate quantum correlated photon-pairs at 1550 nm telecom band via pulse-pumped spontaneous four-wave mixing in high-index doped silica glass (HDSG) waveguides. The input and output ports of the 30-cm-long on-chip HDSG spiral waveguide are coupled to standard polarization maintaining fibers, which brings convenience to mode excitation and photon-pair collection. The flattened group velocity dispersion of the TE mode in the spiral waveguide is about 39 ps/km/nm at 1550 nm. When pumping around 1550 nm, the wavelength range of the generated signal (idler) photons can be more than 20 nm. Experimental results show that, in room temperature, the measured coincidence-to-accidental ratio (CAR) is about 200 when the photon-pair production rate is about 2×10^-5 pairs/pulse, and the main noise origin of the photon pair source is spontaneous Raman scattering. Our investigations show that the HDSG waveguide, which can be fabricated using CMOS compatible technologies, is a promising candidate for developing miniaturized quantum light sources.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Changyue Wang, Liang Cui, Hao Feng, and Xiaoying Li "Telecom-band photon-pair source based on high-index doped silica glass spiral waveguide", Proc. SPIE 12775, Quantum and Nonlinear Optics X, 127750T (26 November 2023); https://doi.org/10.1117/12.2689155

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