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Continuous-wave broadly tunable high-power Cr:CdS laser.

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  • 1Institut für Photonik, TU Wien, Gusshausstrasse 27/387, 1040 Vienna, Austria.

Applied Physics. B, Lasers and Optics
|April 3, 2015
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Summary
This summary is machine-generated.

This study details the spectroscopic and laser properties of chromium-doped cadmium sulfide (Cr2+:CdS) in the mid-infrared spectrum. Researchers achieved continuous-wave laser output up to 1.8 W, tunable from 2.240 to 3.285 μm.

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Area of Science:

  • Solid-state laser physics
  • Mid-infrared optics
  • Materials science

Background:

  • Chromium-doped II-VI semiconductors are promising for mid-infrared lasers.
  • Understanding spectroscopic properties is crucial for optimizing laser performance.

Purpose of the Study:

  • To characterize the spectroscopic properties of Cr2+:CdS.
  • To investigate its potential as a mid-infrared laser medium.
  • To demonstrate continuous-wave laser operation and tunability.

Main Methods:

  • Temperature-dependent absorption, luminescence, and lifetime measurements.
  • Continuous-wave laser experiments using Tm-fiber laser pumping.
  • Tunability measurements using a CaF2 prism.

Main Results:

  • Determined peak emission cross section of 1.35 × 10^-18 cm^2 at room temperature.
  • Measured luminescence lifetime varying from 7.6 μs at 8 K to 0.48 μs at 320 K.
  • Achieved 1.8 W CW output at 2.5 μm with 35.5% slope efficiency.
  • Demonstrated laser tuning from 2.240 to 3.285 μm.

Conclusions:

  • Cr2+:CdS exhibits favorable spectroscopic characteristics for mid-infrared laser applications.
  • The demonstrated laser performance highlights its potential for generating tunable mid-infrared radiation.