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Plasma optical modulators for intense lasers.

Lu-Le Yu1,2, Yao Zhao1,2, Lie-Jia Qian1,2

  • 1Key Laboratory for Laser Plasmas (Ministry of Education), Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China.

Nature Communications
|June 11, 2016
PubMed
Summary
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Researchers developed an ultrafast, plasma-based optical modulator capable of directly modulating high-power lasers. This novel modulator achieves a broad spectrum with over 100% fractional bandwidth, extending into the mid-infrared.

Area of Science:

  • Physics
  • Laser Science
  • Plasma Physics

Background:

  • Conventional optical modulators are limited to low-intensity light.
  • High-power laser modulation is crucial for various scientific applications.

Purpose of the Study:

  • To present an ultrafast, plasma-based optical modulator for high-power lasers.
  • To achieve broad spectral bandwidth modulation.

Main Methods:

  • Utilizing two co-propagating laser pulses in a sub-millimetre underdense plasma.
  • A drive laser excites an electron plasma wave, which then modulates a carrier laser pulse.

Main Results:

  • Demonstrated direct modulation of high-power lasers up to 10^16 W/cm^2.
  • Achieved an extremely broad spectrum with fractional bandwidth >100%.

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  • Extended spectral output into the mid-infrared regime.

    • Conclusions:

    • The plasma-based modulator offers a novel solution for high-power laser modulation.
    • The technique enables ultrafast modulation with exceptional spectral broadening.