Abstract
Raman-scattering noise in silica has been the key obstacle toward the realisation of high quality fiber-based photon-pair sources. Here, we experimentally demonstrate how to get past this limitation by dispersion tailoring a xenon-filled hollow-core photonic crystal fiber. The source operates at room temperature, and is designed to generate Raman-free photon-pairs at useful wavelength ranges, with idler in the telecom, and signal in the visible range. We achieve a coincidence-to-accidentals ratio as high as 2740 combined with an ultra low heralded second order coherence {g}_{H}^{(2)}(0)=0.002, indicating a very high signal to noise ratio and a negligible multi-photon emission probability. Moreover, by gas-pressure tuning, we demonstrate the control of photon frequencies over a range as large as 13 THz, covering S-C and L telecom band for the idler photon. This work demonstrates that hollow-core photonic crystal fiber is an excellent platform to design high quality photon-pair sources, and could play a driving role in the emerging quantum technology.
Highlights
Raman-scattering noise in silica has been the key obstacle toward the realisation of high quality fiberbased photon-pair sources
Within the fiber-related endeavors, photon-pairs have been produced in many different architectures encompassing single-mode fiber[4,5], dispersion-shifted fiber[6,7,8,9], birefringent single-mode fiber[10,11], micro/nano-fiber[12,13] and photonic crystal fiber (PCF)[14,15,16,17,18,19,20]
With Inhibited-Coupling guiding Hollow-core photonic crystal fibers (HCPCF) (IC-HCPCF)[33], this overlap can be as low as 10−6
Summary
Raman-scattering noise in silica has been the key obstacle toward the realisation of high quality fiberbased photon-pair sources. We use a gas-filled IC-HCPCF architecture to demonstrate, for the first time, the possibility of Raman-free spontaneous photon-pair generation through four-wave mixing inside a fiber.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
