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

MOSFET: Enhancement Mode

MOSFET: Enhancement Mode

Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...

You might also read

Related Articles

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

Sort by

Same author

Anatomical feasibility and experimental evaluation of sensor coupling sites for fully implantable active middle ear implants.

Hearing research·2026

Same author

Assessing plant water status: Part 2 - Non-destructive and remote sensing approaches.

Journal of the science of food and agriculture·2026

Same author

Assessing plant water status: Part 1 - Classical methods.

Journal of the science of food and agriculture·2026

Same author

[Urogenital Symptoms in Cyclists and Reduction of Perineal Pressure Load Using a Prostate Volume-Adapted Bicycle Saddle].

Aktuelle Urologie·2026

Same author

Are we missing an important point? Risk factors for intraoperative complications and additional procedures when performing post-chemotherapy RPLND for testicular tumors.

Japanese journal of clinical oncology·2026

Same author

Looking Good From the End of Bed: Surgical Clinical Intuition.

ANZ journal of surgery·2026

Same journal

Denoising algorithm of Φ-OTDR systems based on adaptive fractional wavelet transform denoising.

Optics express·2026

Same journal

Millisecond photon-to-photon latency and high-speed volumetric projection system for optogenetics.

Optics express·2026

Same journal

Polarization-encoded coaxial structured light for high-precision 3D surface profilometry.

Optics express·2026

Same journal

Discrete freeform optical design based on collaborative optimization of point cloud and local normals.

Optics express·2026

Same journal

Ultrafast ghost imaging with 25 GHz speckle switching and wavelength-division multiplexing.

Optics express·2026

Same journal

Atomic vapor cells fabricated by femtosecond laser welding of standard-optical-quality glass.

Optics express·2026

See all related articles

Search research articles

Related Experiment Video

Updated: Apr 20, 2026

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

Self-mode-locking semiconductor disk laser.

Mahmoud Gaafar, Philipp Richter, Hakan Keskin

|November 18, 2014

Summary

This summary is machine-generated.

Self-mode-locking in semiconductor disk lasers offers a simpler, cost-effective pulsed laser alternative. This study provides clear evidence of true mode-locking in a saturable-absorber-free device, demonstrating stable sub-picosecond pulses and excellent beam quality.

More Related Videos

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

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

Published on: March 30, 2017

Related Experiment Videos

Last Updated: Apr 20, 2026

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

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

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

Published on: March 30, 2017

Area of Science:

Optics and Photonics
Semiconductor Lasers
Ultrafast Lasers

Background:

Mode-locked semiconductor disk lasers are crucial for pulsed laser applications.
Traditional designs rely on saturable absorbers, increasing complexity and cost.
Self-mode-locking presents a promising, simpler alternative.

Purpose of the Study:

To provide clear evidence of true mode-locking in a saturable-absorber-free semiconductor disk laser.
To demonstrate the capabilities and stability of self-mode-locked devices.
To address controversies regarding the definition and observation of self-mode-locking.

Main Methods:

Experimental investigation of a saturable-absorber-free semiconductor disk laser.
Utilizing a BBO crystal for second-harmonic generation (SHG) of the out-coupled beam.
Long-time-span pulse train and radiofrequency spectra measurements.
Autocorrelation trace and beam-profile measurements (M-square factor).

Main Results:

Demonstrated clear evidence of mode-locking in a saturable-absorber-free device.
Achieved stable sub-picosecond pulses at a 500 MHz repetition rate.
Confirmed excellent beam quality with an M-square factor < 1.1 for both axes.
Showcased green light generation via SHG, indicating high pulse energy.

Conclusions:

Self-mode-locking is a viable and effective technique for semiconductor disk lasers.
This approach reduces laser complexity and cost while maintaining high performance.
The demonstrated device exhibits stable, high-quality pulsed operation suitable for various applications.