Fast and wide-band tuning single-mode microlaser based on fiber Fabry-P\'erot microcavities

TL;DR

This paper presents a fiber-based single-mode microlaser operating at 1535 nm with wide-band tuning, fast modulation, and narrow linewidth, suitable for advanced optical applications.

Contribution

The work introduces a fiber Fabry-Pérot microcavity microlaser with combined wide-band tuning, high-speed modulation, and narrow linewidth in a single fiber component.

Findings

Achieves 1.3 THz wide-band tuning without mode hopping.

Attains a tuning rate of 60 kHz and a frequency scan rate of 1.6×10^{17} Hz/s.

Laser linewidth measured as narrow as 3.1 MHz.

Abstract

A narrow linewidth laser operating at the telecommunications band combined with both fast and wide-band tuning features will have promising applications. Here, we demonstrate a single-mode (both transverse and longitude mode) continuous microlaser around 1535 nm based on a fiber Fabry-P\'erot microcavity, which achieves wide-band tuning without mode hopping to 1.3 THz range and fast tuning rate to 60 kHz, yields a frequency scan rate of $1.6\times10^{17}$ Hz/s. Moreover, the linewidth of the laser is measured as narrow as 3.1 MHz. As the microlaser combines all these features into one fiber component, it can serve as the seed laser for versatile applications in optical communication, sensing, frequency-modulated continuous-wave radar and high resolution imaging.