This cost-effective analyzer reduces the complexity level, effort, and cost to perform one of the most precise polarization entanglement analysis using two detectors [1]. The analyzer as shown in Figure 1 is provided along with a control unit, USB cable and power supply. The intuitive graphical user interface (GUI) can be used to perform any desired wave plate rotation. Default settings allow one to perform a set of 36 measurements (shown in Figure 3) in the canonical basis {H, V, D, A, R, L}⊗{H, V, D, A, R, L}, for generating precise tomography through two single-photon detectors.
This device consists of two rotation stages as shown in Figure 2. Each stage contains a rotatable quarter-wave plate (QWP), rotatable half-wave plate (HWP) and fixed polarizer, which can be replaced with a polarizing beam splitter (PBS) if required. The input and output ports are coupled to fiber pigtails. Systems with connector receptacles or collimators for free-space detection can also be provided.
This polarization system rotates the polarization states of the photon pairs with sub-degree precision. This is achieved through built-in encoders enabling closed loop operation. The coincidences rate, which is the core of reconstructing a photon pair polarization state, is thus realized at high precision with excellent repeatability in the course of a quick experiment.
In addition, heralding efficiency of a given polarization entangled-photon source can be maintained thanks to high coupling efficiency between the input and output fibers delivering the photon pairs from the source to the detectors with a negligible optical loss.
Features:
• Plug-and-play analyzer with a controller unit
• Customized software and intuitive GUI
• Quick and precise polarization state rotators
• Compact size and small footprint
Applications:
• Polarization state tomography
• Automation of multi-polarization state analysis
