Multi-line fiber laser system for cesium and rubidium atom interferometry.

Area of Science:

• Atomic, Molecular & Optical Physics
• Laser Physics & Photonics
• Quantum Technologies

Background:

• Fiber laser systems are crucial for atomic manipulation and precision measurements.
• Existing systems often lack multi-species capability or are not fiber-based.
• Cesium (Cs) manipulation, in particular, has lacked dedicated fiber laser solutions.

Purpose of the Study:

• To present an innovative multi-line fiber laser system for both cesium and rubidium manipulation.
• To demonstrate a novel laser architecture for onboard atomic instruments.
• To enable a new generation of atom interferometers using multiple atomic species.

Main Methods:

• Utilized frequency conversion of two lasers operating at 1560 nm and 1878 nm.
• Leveraged high-performance, fiber-coupled components for system integration.
• Demonstrated multi-line operation of an all-fiber laser system.

Main Results:

• Achieved 350 mW of laser power at 780 nm for rubidium (Rb) manipulation.
• Delivered 210 mW of laser power at 852 nm for cesium (Cs) manipulation.
• Successfully demonstrated a fiber laser system for Cs manipulation, a first reported instance.

Conclusions:

• The developed fiber laser system is highly promising for atomic manipulation, especially for cesium.
• This technology opens new perspectives for compact atomic instruments for onboard applications.
• The architecture paves the way for novel atom interferometers involving three atomic species (85Rb, 87Rb, and 133Cs).