Generation of a 650 nm - 2000 nm Laser Frequency Comb based on an Erbium-Doped Fiber Laser

TL;DR

This paper reports a broadband laser frequency comb spanning from 660 nm to 2000 nm, generated using an erbium-doped fiber laser with nonlinear broadening techniques, suitable for various optical applications.

Contribution

The authors developed a wideband laser frequency comb covering visible to near-infrared wavelengths using a novel combination of fiber lasers and supercontinuum generation.

Findings

Spans over 300 THz from 660 nm to 2000 nm

Produces 1.2 nJ, 70 fs pulses at 1050 nm

Maintains comb coherence verified by f-2f interferometry

Abstract

We present a laser frequency comb based upon a 250 MHz mode-locked erbium-doped fiber laser that spans more than 300 terahertz of bandwidth, from 660 nm to 2000 nm. The system generates 1.2 nJ, 70 fs pulses at 1050 nm by amplifying the 1580 nm laser light in Er:fiber, followed by nonlinear broadening to 1050 nm and amplification in Yb:fiber. Extension of the frequency comb into the visible is achieved by supercontinuum generation from the 1050 nm light. Comb coherence is verified with cascaded f-2f interferometry and comparison to a frequency stabilized laser.