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Semiconductor disk laser pumped Cr2+:Znse lasers.

Nils Hempler1, John-Mark Hopkins, Benno Rösener

  • 1Institute of Photonics, SUPA, University of Strathclyde, Wolfson Centre, 106 Rottenrow, Glasgow, G4 0NW, UK. nils.hempler@strath.ac.uk

Optics Express
|November 13, 2009
PubMed
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A novel optically-pumped semiconductor disk laser (SDL) effectively pumps a Cr(2+):ZnSe laser, achieving 1.8W output power with 50% slope efficiency and low noise. This flexible laser system demonstrates robust performance without needing optical isolation.

Area of Science:

  • Laser physics
  • Materials science
  • Optoelectronics

Background:

  • Semiconductor disk lasers (SDLs) offer a flexible and scalable platform for various laser applications.
  • Chromium-doped zinc selenide (Cr(2+):ZnSe) is a promising gain medium for mid-infrared lasers.

Purpose of the Study:

  • To investigate the performance of a Cr(2+):ZnSe laser pumped by a novel optically-pumped semiconductor disk laser (SDL).
  • To evaluate the output power, efficiency, noise characteristics, and robustness of the combined laser system.

Main Methods:

  • Utilized an optically-pumped semiconductor disk laser (SDL) as the pump source for a Cr(2+):ZnSe laser.
  • Characterized the output power, wavelength, slope efficiency, and output intensity noise of the Cr(2+):ZnSe laser.
  • Assessed the system's tolerance to optical feedback without requiring optical isolation.

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Main Results:

  • The SDL provided up to 6W of output power at 1.98 microm.
  • The Cr(2+):ZnSe laser achieved an output power of 1.8W with a slope efficiency of approximately 50% with respect to absorbed pump power.
  • The system exhibited low output intensity noise (<0.14% RMS) and required no optical isolation, even with significant optical feedback.

Conclusions:

  • The optically-pumped semiconductor disk laser (SDL) is a viable and effective pump source for Cr(2+):ZnSe lasers.
  • The demonstrated Cr(2+):ZnSe laser system offers high efficiency, low noise, and robust operation, making it suitable for various applications.
  • The system's tolerance to optical feedback simplifies its implementation and broadens its potential use cases.