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Related Experiment Video

Updated: May 16, 2026

Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy
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Fast, long-scan-range pump-probe measurement based on asynchronous sampling using a dual-wavelength mode-locked fiber

Xin Zhao1, Zheng Zheng, Lei Liu

  • 1School of Electronic and Information Engineering, Beihang University, 37 Xueyuan Rd, Beijing 100191, China.

Optics Express
|November 29, 2012
PubMed
Summary

A novel pump-probe technique uses a single dual-wavelength fiber laser for fast, long-range scans. This simplified asynchronous sampling method achieves picosecond steps at millisecond speeds.

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Area of Science:

  • Optics and Photonics
  • Ultrafast Spectroscopy

Background:

  • Pump-probe spectroscopy is crucial for studying ultrafast dynamics.
  • Traditional asynchronous sampling requires two synchronized lasers, complicating setups.

Purpose of the Study:

  • To demonstrate a simplified, fast, and long-scan-range pump-probe scheme.
  • To reduce system complexity by using a single laser source.

Main Methods:

  • Experimental demonstration of a pump-probe scheme using a dual-wavelength passively mode-locked fiber laser.
  • Utilizing inherent repetition frequency differences from intracavity dispersion for asynchronous sampling.

Main Results:

  • Achieved a tens-of-nanoseconds delay range with picosecond scan steps.
  • Enabled millisecond scan speeds.
  • Significantly simplified the experimental setup compared to traditional methods.

Conclusions:

  • The proposed scheme offers a simpler and more efficient approach to ultrafast pump-probe spectroscopy.
  • This method is suitable for applications requiring fast, long-range delay scans.