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Continuous-wave broadly tunable Cr2+:ZnSe laser.

G J Wagner1, T J Carrig, R H Page

  • 1Coherent Technologies, Inc., 655 Aspen Ridge Drive, Lafayette, Colorado 80026, USA.

Optics Letters
|December 12, 2007
PubMed
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This study demonstrates a room-temperature, tunable laser using chromium-doped zinc selenide (Cr2+:ZnSe). The all-solid-state device offers continuous wave output and broad wavelength tunability for various applications.

Area of Science:

  • Materials Science
  • Laser Physics
  • Optoelectronics

Background:

  • Development of tunable solid-state lasers is crucial for spectroscopy and optical sensing.
  • Chromium-doped II-VI semiconductors offer potential for mid-infrared laser applications.

Purpose of the Study:

  • To report the room-temperature, continuous-wave (CW) operation of an all-solid-state Cr(2+):ZnSe laser.
  • To characterize the laser's output power, efficiency, and tuning range.

Main Methods:

  • Utilized a chromium-doped zinc selenide (Cr2+:ZnSe) crystal as the gain medium.
  • Operated the laser in a continuous-wave (CW) mode at room temperature.
  • Investigated the laser's performance including output power, slope efficiency, and wavelength tunability.

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Main Results:

  • Achieved room-temperature, continuous-wave (CW) laser operation.
  • Demonstrated a maximum output power of 250 mW.
  • Recorded an absorbed power slope efficiency of 63%.
  • Achieved continuous tunability spanning from 2138 nm to 2760 nm.

Conclusions:

  • The Cr2+:ZnSe laser system is a viable room-temperature, broadly tunable mid-infrared source.
  • The demonstrated performance highlights the potential of Cr2+-doped chalcogenides for laser applications.
  • Further research could optimize cavity design and pumping schemes for enhanced performance.