A compact frequency-stabilized pump laser for wavelength conversion in long-distance quantum communication

TL;DR

This paper presents a compact, highly stable 1064 nm laser stabilized via iodine spectroscopy, suitable for wavelength conversion in long-distance quantum communication, enabling connections between quantum memories at remote nodes.

Contribution

The development of a compact, frequency-stabilized laser at 1064 nm with high stability and narrow linewidth for quantum communication applications.

Findings

Laser frequency stability of 5.7×10^-12

Linewidth of 400 kHz

Suitable for wavelength conversion in quantum networks

Abstract

We demonstrate a compact frequency-stabilized laser at 1064 nm using Doppler-free saturation absorption spectroscopy of molecular iodine. The achieved laser frequency stability and linewidth are 5.7 10-12 (corresponding to an uncertainty of the laser frequency of 1.6 kHz) and 400 kHz, respectively. The developed frequency-stabilized laser can be used as a pump laser for wavelength conversion from visible to telecom (or vice versa) to connect quantum memories utilizing nitrogen-vacancy centers in diamond at remote nodes in fiber-based quantum communication.