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Two-color Semiconductor Mode-locked Laser system for Multiphoton Imaging Applications.

Srinivas Varma Pericherla1,2, Chinmay Shirpurkar1, Lawrence Trask1

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IEEE Photonics Technology Letters : a Publication of the IEEE Laser and Electro-Optics Society
|June 12, 2023
PubMed
Summary
This summary is machine-generated.

We developed a novel all-semiconductor mode-locked laser system. This two-color laser emits synchronized picosecond pulses, crucial for nonlinear optics applications.

Keywords:
Semiconductor optical amplifierintensity Cross-correlationmode-locked lasertwo-photon fluorescence

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Area of Science:

  • Optics and Photonics
  • Semiconductor Lasers
  • Ultrafast Lasers

Background:

  • Mode-locked lasers are essential for generating ultrashort optical pulses.
  • Semiconductor optical amplifiers offer a compact and efficient gain medium for laser systems.

Purpose of the Study:

  • To demonstrate an all-semiconductor mode-locked laser system.
  • To achieve synchronized dual-wavelength picosecond pulse generation.
  • To enable high peak power densities for nonlinear optical applications.

Main Methods:

  • Utilized two external cavity mode-locked lasers.
  • Employed semiconductor optical amplifiers as gain media.
  • Achieved synchronized pulse trains at 834 nm and 974 nm.

Main Results:

  • Generated picosecond pulses with average powers of 25 mW and 60 mW.
  • Achieved peak powers exceeding 100 W and 80 W.
  • Demonstrated a relative timing jitter of 7.3 ps for synchronized pulses at 282 MHz.
  • Obtained TEM00 mode profile with fiber-coupled output.
  • Achieved peak power densities >1 GW/cm2 by focusing the beam to a 4 μm spot.

Conclusions:

  • The all-semiconductor mode-locked laser system provides a robust platform for generating synchronized dual-wavelength picosecond pulses.
  • The high peak power densities achieved are suitable for exciting optical nonlinearities.
  • This technology has potential applications in nonlinear optics, spectroscopy, and optical communications.