2020/12/07 by Ioannis Caltzidis, Harald Kübler, Tilman Pfau +2
Chemistry · Engineering · Physics and Astronomy · #Advanced Fiber Laser Technologies #Beam (structure) #Beam splitter #Chemistry #Dichroic glass #Faraday cage #Faraday effect #Faraday rotator #Four-wave mixing #Laser #Magnetic field #Nonlinear optics #Optical fiber #Optics #Optoelectronics #Photonic and Optical Devices #Photonic-crystal fiber #Physics #Polarization (electrochemistry) #Quantum mechanics #Quantum optics and atomic interactions #Splitter #physics.atom-ph #quant-ph
paper · pdf · doi:10.1103/physreva.103.043501
published as Phys. Rev. A 103, 043501 (2021) · 8 pages, 7 figures
arxiv created 2020/12/07 · openalex publication_date 2021/04/01 · arxiv updated 2021/04/06 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We demonstrate an atomic Faraday dichroic beam splitter suitable for spatially separating signal and idler fields from pump degenerate four-wave mixing in an atomic source. By rotating the plane of polarization of one mode 90^\ensuremath∘ with respect to the other, a subsequent polarizing beam splitter separates the two frequencies, which differ by only 13.6 GHz, and achieves a suppression of (\ensuremath-26.3\ifmmode±\else\textpm\fi0.1) and (\ensuremath-21.2\ifmmode±\else\textpm\fi0.1) dB in the two outputs, with a corresponding transmission of 97% and 99%, respectively. This technique avoids the necessity of using spatial separation of four-wave mixing modes and thus opens the door for enhancing the process efficiency in waveguide experiments. As a proof of principle, we generate light via four-wave mixing in 87Rb loaded into a hollow-core photonic crystal fiber and interface it with the atomic Faraday dichroic beam splitter.