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Updated: Sep 11, 2025

Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy

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Compact fiber-coupled narrowband two-mode squeezed light source.

Umang Jain, Jae Choi, Christopher Hull

|August 15, 2025

Summary

This summary is machine-generated.

Researchers developed a compact fiber-coupled source for two-mode squeezed states of light using four-wave mixing in 85Rb atomic vapor. This portable quantum light source is optimized for low power and ideal for quantum technologies.

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Area of Science:

Quantum optics and photonics
Quantum information science

Background:

Quantum correlated states of light, like squeezed states, are essential for advancing quantum technologies.
Compact, efficient, and robust sources are critical for generating these quantum states for applications.

Purpose of the Study:

To report a compact, narrowband, fiber-coupled source of two-mode squeezed states of light.
To utilize four-wave mixing (FWM) in 85Rb atomic vapor for generating squeezed states.

Main Methods:

Employed four-wave mixing (FWM) in an 85Rb atomic vapor.
Designed a compact, modular, fiber-coupled system with seed and pump beams.
Optimized the source for low pump power (135 mW).

Main Results:

Achieved a maximum intensity-difference squeezing of 4.4 dB at 1 MHz.
Generated narrowband two-mode squeezed states of light at 795 nm.
Demonstrated a compact, fiber-coupled source with a small modular form factor.

Conclusions:

The developed source is ideal for atomic-based quantum sensing and quantum networking.
Paves the way for versatile and portable quantum information science platforms.
Highlights the potential of atomic vapor FWM for generating quantum resources.