Team Members: Lion Edelman

Supervisors / Mentors: Nir Bar-Gill, Dan Marom

 

Coupling nitrogen-vacancy (NV) centers in diamond to optical fibers is a promising technique for developing compact, fiber-based quantum sensors, especially for magnetic field detection. The main goal of this project was to characterize and improve NV-diamond to fiber coupling by exploring different fiber types, including a novel multi-core fiber developed with Dan Marom’s group. The research involved characterizing both single-mode and multi-mode fibers and comparing their performance with the custom fiber under controlled optical and microwave excitation conditions.

The system setup included a green laser (532 nm), acousto-optic modulator and a diamond sample positioned at the fiber interface. Emphasis was placed on fluorescence signal analysis and magnetic resonance detection using microwave excitation. Our approach aimed to enhance light collection efficiency and sensing fidelity by leveraging advanced fiber designs.

Future directions include in vivo magnetic field sensing in biological tissues and demonstrating the benefits of our coupling approach compared to traditional implementations. This work contributes to the ongoing development of compact, high-performance quantum sensors for biomedical and fundamental research applications.