Injection-locking of a fiber-pigtailed laser to an external cavity diode laser via fiber optic circulator

TL;DR

This paper presents a simple, tunable injection-locking scheme for fiber-pigtailed lasers using a fiber optic circulator, achieving high power and wide wavelength tuning suitable for atomic physics applications.

Contribution

It introduces a cost-effective, straightforward fiber-based injection-locking method that simplifies traditional free-space setups for high-power laser applications.

Findings

Achieved up to 600 mW output power at the injected frequency.

Demonstrated tuning over approximately 15 nm wavelength range.

Simplified the injection-locking process compared to traditional free-space methods.

Abstract

We report a simple tunable master-slave laser injection-lock scheme for atomic physics experiments. Seed light from an external cavity diode laser is injected into a high-power fiber-pigtailed diode laser via a fiber optic circulator. High-power outputs (up to $\sim$600 mW) at the injected frequency have been obtained in a single-mode fiber with tuning over a wide wavelength range ($\sim$15 nm). The scheme is simpler and more cost-effective than the traditional scheme of free-space injection-locking.