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Related Experiment Videos

End-pumped 1.5 microm monoblock laser for broad temperature operation.

Bradley W Schilling1, Stephen R Chinn, A D Hays

  • 1United States Army RDECOM CERDEC, Night Vision and Electronic Sensors Directorate, Fort Belvoir, VA 22060, USA. bradley.schilling@nvl.army.mil

Applied Optics
|August 17, 2006
PubMed
Summary

This study presents a new monoblock laser system delivering over 10 mJ at 1.5 micrometers and 10 pulses per second. It operates reliably across wide temperature ranges without active cooling, showcasing robust laser technology.

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Area of Science:

  • Laser Physics
  • Optical Engineering

Background:

  • Developing compact, high-energy lasers for diverse applications is crucial.
  • Existing laser systems often require active temperature control, limiting their operational range and increasing complexity.

Purpose of the Study:

  • To describe a next-generation monoblock laser system.
  • To demonstrate high-energy output at 1.5 micrometers with a high repetition rate.
  • To achieve wide ambient temperature operation without active thermal management.

Main Methods:

  • Utilized a Neodymium-doped Yttrium Aluminum Garnet (Nd:YAG) laser.
  • Incorporated a Cr4+ passive Q-switch and an intracavity potassium titanyl phosphate (KTP) optical parametric oscillator.
  • Employed end-pumping of the Nd:YAG slab with a 12-bar stack of 100 W diode bars.

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  • Compared different pump radiation focusing techniques: lensed design, reflective concentrator, and lens duct.

    • Main Results:

    • Achieved >10 mJ output energy at 1.5 micrometers.
    • Demonstrated a repetition rate of 10 pulses per second (pps).
    • Confirmed reliable operation across a wide temperature range (-20°C to 50°C) for all end-pumped configurations.

    Conclusions:

    • The developed monoblock laser offers high performance and wide temperature capability.
    • End-pumping with diode bars is an effective strategy for achieving high repetition rates and efficiency.
    • The system eliminates the need for active temperature control, enhancing its practicality for field applications.