Versatile High-Power Monolithic All-Glass Fiber Amplifier for Pulsed Signals with a Wide Range of Repetition Rates

TL;DR

This paper introduces a compact, all-glass fiber amplifier capable of amplifying short pulses across a wide range of repetition rates with high peak and average powers, improving reliability and spectral quality.

Contribution

It presents a novel monolithic all-glass fiber amplifier design that achieves high power, short pulses, and broad repetition rate coverage without free-space components.

Findings

Achieves over 2 MW peak power at 1 MHz with 50 ps pulses.

Provides over 625 W average power at 20 MHz with 50 ps pulses.

Delivers over 645 W average power at 1 GHz with 20 ps pulses.

Abstract

This study presents a compact, high-power monolithic all-glass spun tapered double-clad fiber amplifier for single-stage amplification of narrow linewidth picosecond pulsed signals from a few tens of mW to several hundred Watts of average power and MW level of peak power, covering a wide range of repetition rates. The absence of free-space elements in the amplifier module enhances its overall reliability by omitting the dependency on the pump alignment and internal back reflections. The versatile all-glass amplifier module delivers 50 ps pulses with over 2 MW peak power at 1 MHz, 50 ps pulses with over 625 W average power at 20 MHz, and 20 ps pulses with over 645 W average power at 1 GHz, all exhibiting excellent spectral, spatial, and polarization characteristics. This monolithic all-glass ultra-large mode area fiber amplifier is verified as a robust solution for direct amplification of short pulses attaining high peak/average power laser systems with excellent spectral, spatial, and polarization characteristics.