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Related Experiment Video

Updated: May 8, 2026

Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy
08:48

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

Published on: November 22, 2019

Carbon nanotube mode-locked optically-pumped semiconductor disk laser.

K Seger1, N Meiser, S Y Choi

  • 1KTH Laser Physics, Royal Institute of Technology, Roslagstullsbacken 21, 106 91 Stockholm, Sweden. ks@laserphysics.kth.se

Optics Express
|August 14, 2013
PubMed
Summary

Researchers achieved mode-locking in an optically pumped semiconductor disk laser using a single-walled carbon nanotube saturable absorber for the first time. This breakthrough enables compact, high-performance laser applications.

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Area of Science:

  • Optics and Photonics
  • Materials Science

Background:

  • Semiconductor disk lasers (SDLs) are versatile light sources.
  • Mode-locking is crucial for generating ultrashort laser pulses.
  • Carbon nanotubes offer unique optical properties for laser applications.

Purpose of the Study:

  • To demonstrate, for the first time, mode-locking of an optically pumped semiconductor disk laser.
  • To utilize a single-walled carbon nanotube (SWCNT) as a saturable absorber for this purpose.
  • To characterize the performance of the mode-locked laser.

Main Methods:

  • An optically pumped semiconductor disk laser was designed and fabricated.
  • A single-walled carbon nanotube film was integrated as a saturable absorber.
  • Passive fundamental mode-locking was achieved and optimized.

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Last Updated: May 8, 2026

Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy
08:48

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

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  • Laser output characteristics, including repetition rate, pulse length, and output power, were measured.

    • Main Results:

    • Stable passive fundamental mode-locking was successfully obtained.
    • The laser operated at a repetition rate of 613 MHz.
    • Ultrashort pulses with a pulse length of 1.23 picoseconds were generated.
    • A maximum average output power of 136 mW was achieved at a wavelength of 1074 nm.

    Conclusions:

    • Optically pumped semiconductor disk lasers can be effectively mode-locked using SWCNT saturable absorbers.
    • This approach enables compact and efficient ultrashort pulse generation.
    • The developed laser system shows potential for various applications requiring high-power, short-wavelength lasers.