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September 2, 2026Applied Physics Letters

Pulse repetition rate-switchable linearly polarized harmonic noise-like pulse at 2 μ m

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Authors

DZDesheng ZhaoXLXuemei LiXYXiao Yang

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Overview

Experimental study demonstrates a rate-switchable harmonic noise-like pulse in a thulium-doped fiber laser, indicating promising utility for supercontinuum spectral manipulation.

Key Points

  • To develop a high-energy, repetition rate-switchable linearly polarized harmonic noise-like pulse source at 2 μm using an all-polarization-maintaining fiber laser configuration.
  • Constructed an all-polarization-maintaining thulium-doped fiber laser designed to enhance intracavity linear and nonlinear phase shifts.
  • Tuned the pulse repetition rate up to the fourth harmonic by increasing pump power.
  • Boosted laser output power using a single-stage all-polarization-maintaining fiber amplifier.
  • Achieved repetition rate switching from 0.583 to 2.334 MHz (up to the 4th harmonic) with oscillator output powers of 4.4, 7.9, 10.8, and 15.3 mW.
  • Amplified average output powers to 3.1, 3.45, 3.67, and 3.74 W across the harmonics, achieving a maximum pulse energy of 1.6 μJ at the 4th harmonic.

Cite This Study

Zhao et al. (2026) studied this question.

synapsesocial.com/papers/6a97e2f6c562ede874ec77cdhttps://doi.org/10.1063/5.0342297
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