Diamond chemical vapor deposition on optical fibers for fluorescence waveguiding

TL;DR

This paper presents a novel method for depositing diamond on optical fibers to enable fluorescence waveguiding, advancing fiber-coupled quantum light sources using defect centers in diamond.

Contribution

It introduces a technique for diamond growth on optical fibers and demonstrates fluorescence transmission, crucial for developing fiber-based single photon sources.

Findings

Successful diamond deposition on optical fibers

Fluorescence from nitrogen-vacancy centers transmitted through fibers

Control over defect concentration during CVD growth

Abstract

A technique has been developed for depositing diamond crystals on the endfaces of optical fibers and capturing the fluorescence generated by optically active defects in the diamond into the fiber. This letter details the diamond growth on optical fibers and transmission of fluorescence through the fiber from the nitrogen-vacancy (N-V) color center in diamond. Control of the concentration of defects incorporated during the chemical vapor deposition (CVD) growth process is also demonstrated. These are the first critical steps in developing a fiber coupled single photon source based on optically active defect centers in diamond.