Single-shot high-resolution spectroscopy of single-photon-level optical pulses using a virtually imaged phased-array...

Area of Science:

• Quantum Optics
• Spectroscopy
• Quantum Information Science

Background:

• Single-shot high-resolution spectroscopy at the single photon-level is crucial for advanced quantum technologies.
• Frequency-multiplexed quantum repeaters require precise spectroscopic measurements for efficient operation.

Purpose of the Study:

• To propose and demonstrate a novel single-shot high-resolution single-photon spectroscopy system.
• To enable enhanced multiplexing capabilities in quantum repeater schemes.

Main Methods:

• Integration of a virtually imaged phased-array (VIPA) for high-resolution frequency-to-spatial mode mapping.
• Utilization of a single-photon avalanche diode (SPAD) array for high-precision spatial mode detection.
• Experimental demonstration using weak coherent pulses with a 120 MHz frequency mode interval.

Main Results:

• Successful demonstration of the proposed single-shot high-resolution single-photon spectroscopy system.
• Achieved frequency mode interval of 120 MHz, matching quantum memory requirements.
• Validated the system's principle for potential quantum repeater applications.

Conclusions:

• The developed spectroscopy system offers a promising approach for advancing quantum repeater technology.
• Maximizing multiplexing capability in frequency-multiplexed quantum repeaters is achievable with this system.
• The system's performance aligns with the needs of atomic frequency comb quantum memories.