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Low-noise tunable deep-ultraviolet supercontinuum laser.

Callum R Smith1, Asbjørn Moltke1, Abubakar I Adamu1

  • 1DTU Fotonik, Technical University of Denmark, 2800, Kgs. Lyngby, Denmark.

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Summary
This summary is machine-generated.

A tunable deep-ultraviolet laser source was developed using argon-filled fiber, achieving low noise. This compact, stable laser is ideal for imaging and spectroscopy applications.

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Area of Science:

  • Laser Physics
  • Nonlinear Optics
  • Spectroscopy

Background:

  • Deep-ultraviolet (UV) laser sources are crucial for advanced imaging and spectroscopy.
  • Existing sources often lack tunability and possess undesirable noise characteristics.
  • Minimizing source noise is critical for enhancing the precision of scientific measurements.

Purpose of the Study:

  • To characterize the pulse-to-pulse relative intensity noise (RIN) of a tunable deep-UV laser source.
  • To investigate the noise properties of a deep-UV source based on an argon-filled anti-resonant hollow-core fiber.
  • To establish a benchmark for noise performance in compact, tunable deep-UV laser systems.

Main Methods:

  • Utilized a 1030 nm, 400 fs laser, compressed to 30 fs pulses.
  • Employed nonlinear compression and an argon-filled anti-resonant hollow-core fiber for supercontinuum generation.
  • Tuned the resonant dispersive wave (RDW) output from 236 nm to 377 nm by adjusting argon pressure.

Main Results:

  • Achieved a tunable deep-UV source with output tunable between 236-377 nm.
  • Demonstrated exceptionally low RIN of 1.9% at ~282 nm under optimal conditions.
  • Provided the first broadband RIN characterization of such a deep-UV source.

Conclusions:

  • The argon-filled AR HC fiber laser offers a stable, compact, and tunable deep-UV source.
  • The characterized low noise properties are a significant advancement for deep-UV applications.
  • This work paves the way for widespread adoption of advanced deep-UV laser technology.