Widely Tunable, Low Linewidth, and High Power Laser Source using an Electro-Optic Comb and Injection-Locked Slave Laser Array

TL;DR

This paper presents a simple, scalable method to generate a widely tunable, high power, and narrow linewidth laser source using an electro-optic comb and injection-locked slave lasers, suitable for various optical applications.

Contribution

The authors demonstrate a novel approach combining an electro-optic frequency comb with injection-locked slave lasers to achieve a widely tunable, high power, and narrow linewidth laser source.

Findings

Achieved approximately 1.25 THz of tunability within the C-Band.

Output power of about 100 mW with high sideband suppression.

Linewidth below 400 Hz across the entire tuning range.

Abstract

We propose a simple approach to implement a tunable, high power and narrow linewidth laser source based on a series of highly coherent tones from an electro-optic frequency comb and a set of 3 DFB slave lasers. We experimentally demonstrate approximately 1.25 THz (10 nm) of tuning within the C-Band centered at 192.9 THz (1555 nm). The output power is approximately 100 mW (20 dBm), with a side band suppression ratio greater than 55 dB, and a linewidth below 400 Hz across the full range of tunability. This approach is scalable and may be extended to cover a significantly broader optical spectral range.