Femtosecond Laser Writing of a Fabry-Perot Cavity in a Polarizing Maintaining Fiber: Towards an All-Fibered Photonic Cell for Future Atom Cooling Applications

Recently, quantum technology has gained a lot of interest knowing that this field is expected to provide new opportunities, especially regarding high sensitivity and precision in sensing applications. However, despite the efforts, most quantum sensors are still bulky and hardly operate outside a dedicated environment. In this paper, we present a new approach and the first step in paving the way for an all-fibered cell for alkali atom cooling aiming toward miniaturization of the quantum sensors. The fibered cell consists of a hollow-core photonic crystal fiber (HCPCF) based on a Kagome-Tubular Hybrid cladding [1] placed between two solid Polarizing Maintaining (PM) fibers with high reflection Fiber Bragg Gratings (FBGs) forming a Fabry-Perot (FP) cavity.