Polarization-Preserving Vacuum Cell for Application or Measurement of Electromagnetic Waves in Vacuum, Method for Its Manufacture and Its Use

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The invention describes a specialized vacuum cell designed to maintain the polarization of electromagnetic waves, especially light, when applied or measured in a vacuum environment. This is achieved by minimizing birefringence (Δn), which can alter the polarization state, through precise assembly processes using low-stress glass and adhesives. The vacuum cell consists of multiple side windows made of glass with low stress-optical coefficients, assembled in a polygonal structure, and is ideal for experiments where accurate control and preservation of polarization are critical.

Use CasesContent extracted from patent full text and abstract with AI.

• Quantum optics experiments requiring polarized laser light, such as with cold atoms or ions.
• High-precision atomic clocks, where laser polarization stability determines measurement accuracy.
• Quantum cryptography, which encodes information in light polarization.
• Magnetometry and gravimetry using atomic sensors needing minimized polarization distortion.
• Spectroscopy requiring high-fidelity transmission of polarized light through a vacuum window.
• Development of quantum simulators with optical lattices requiring precise control of laser polarization.
• Fundamental physics experiments in ultrahigh vacuum involving sensitive light measurements.

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• Dramatically reduces stress-induced birefringence to less than Δn < 10⁻⁶ or even 10⁻⁷, preserving polarization quality.
• Enables much more accurate and reproducible optical measurements in vacuum.
• Allows for highly compact vacuum systems compared to traditional metallic chambers with separate windows.
• Minimizes polarization distortion for advanced quantum and optical experiments, enhancing device performance.
• Simple and robust manufacturing process that supports consistent, low-leakage vacuum cells.
• Flexibility in applications due to modularity and compatibility with standard vacuum flanges.
• Adaptability to specific application requirements through materials and geometric design choices.

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Patent Abstract

The invention relates to a method, a device, and the use of a polarization-maintaining vacuum cell for applying or measuring electromagnetic waves in a vacuum. The birefringence Δn is