Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Load-frequency control

Load-frequency control

Load-frequency control (LFC) is vital for maintaining power system stability, ensuring that frequency and power flows remain within acceptable limits during load changes. Turbine-governor control eliminates rotor accelerations and decelerations following load changes. However, a steady-state frequency error persists when the change in the turbine-governor reference setting is zero. In an interconnected power system, each area agrees to export or import a scheduled amount of power through...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Low-noise fiber laser systems at 689 nm and 698 nm for strontium.

Optics express·2025

Same author

Balanced-detection visible optical coherence tomography with a low-noise supercontinuum laser.

Biomedical optics express·2025

Same author

Challenges and spectra interpretability in textile sorting: NIR hyperspectral images and chemometrics.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy·2025

Same author

Modeling and experimental characterization of two-wave mixing in Yb-doped fiber amplifiers.

Optics express·2024

Same author

Dissipative Kerr soliton generation at 2μm in a silicon nitride microresonator.

Optics express·2024

Same author

Theory and experiment of transient two-wave mixing in Yb-doped single-frequency fiber amplifiers induced by frequency modulation.

Optics express·2024

Search research articles

Related Experiment Video

Updated: Jun 29, 2026

Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements

Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements

Published on: February 28, 2016

Coherent instabilities in thulium-based fiber amplifiers induced by laser frequency modulation.

Andrea Pertoldi, Jakob M Hauge, Patrick Bowen Montague

|November 15, 2024

Summary

Frequency modulation in fiber amplifiers causes detrimental coherent backscattering. This study investigates instabilities in Tm- and Tm/Ho-doped amplifiers, identifying key factors influencing this backward-propagating signal.

More Related Videos

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

Published on: July 12, 2017

Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy

Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy

Published on: November 22, 2019

Related Experiment Videos

Last Updated: Jun 29, 2026

Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements

Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements

Published on: February 28, 2016

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

Published on: July 12, 2017

Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy

Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy

Published on: November 22, 2019

Area of Science:

Fiber optics
Laser physics
Nonlinear optics

Background:

Frequency modulation (FM) of narrow-linewidth lasers can induce coherent backscattering.
This phenomenon is particularly problematic in cladding-pumped fiber amplifiers, especially those based on Thulium (Tm).
Coherent backscattering presents a significant limitation for power scaling in fiber amplifier applications.

Purpose of the Study:

To investigate instabilities caused by frequency modulation in Thulium (Tm)- and Thulium/Holmium (Tm/Ho)-doped fiber amplifiers.
To analyze the impact of various design parameters and operational regimes on coherent backscattering.
To understand the fundamental mechanisms behind the backward-propagating (BP) signal generation.

Main Methods:

Experimental investigation of Tm- and Tm/Ho-doped fiber amplifiers.
Systematic variation of active fiber length, pumping scheme, and dopant type.
Analysis of amplifier operation across a range of laser frequency tuning rates and amplifier gains.

Main Results:

Coherent backscattering was observed in both Tm- and Tm/Ho-doped fiber amplifiers.
The backward-propagating (BP) signal exhibited a peak at a specific laser frequency tuning rate for each amplifier configuration.
BP signal amplitude and frequency increased with higher amplifier gain and longer active fiber lengths.

Conclusions:

Frequency modulation-induced coherent backscattering is a critical instability in Tm-based fiber amplifiers.
Amplifier gain and fiber length are key parameters that exacerbate this detrimental effect.
Understanding these instabilities is crucial for advancing power scaling in fiber laser and amplifier technologies.