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Diode-pumped tape casting planar waveguide YAG/Nd:YAG/YAG ceramic laser.

Haifeng Lin, Fei Tang, Weidong Chen

    Optics Express
    |April 4, 2015
    PubMed
    Summary

    We achieved efficient laser action in a novel diode-pumped YAG ceramic planar waveguide. This new technology offers high output power and stable, short-pulsed laser operation for advanced applications.

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    Area of Science:

    • Materials Science
    • Optics and Photonics
    • Ceramic Engineering

    Background:

    • Neodymium-doped Yttrium Aluminum Garnet (Nd:YAG) lasers are crucial for various applications.
    • Developing efficient and compact laser systems remains a key research area.
    • Planar waveguides offer advantages in beam confinement and thermal management.

    Purpose of the Study:

    • To demonstrate efficient guided laser action in a novel diode-pumped Nd:YAG ceramic planar waveguide.
    • To investigate the performance of this waveguide in both continuous wave and passively Q-switched operation.
    • To explore the potential of advanced fabrication techniques for laser ceramics.

    Main Methods:

    • Fabrication of Nd:YAG ceramic planar waveguides using tape casting and vacuum sintering.

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  • Diode-pumping of the ceramic waveguide.
  • Characterization of laser performance in continuous wave (CW) and passively Q-switched (PQS) modes.
  • Utilizing a graphene-oxide based output coupler for PQS operation.

    • Main Results:

    • Achieved efficient guided laser action for the first time in this type of ceramic planar waveguide.
    • In CW operation, a maximum output power of 840 mW with a slope efficiency of 65% was obtained.
    • In PQS operation, stable pulse trains with a shortest pulse duration of 179 ns at 930 kHz repetition rate and 221 nJ single pulse energy were achieved.

    Conclusions:

    • The developed Nd:YAG ceramic planar waveguide fabricated by tape casting and vacuum sintering exhibits excellent laser performance.
    • This technology enables efficient CW and PQS laser operation, paving the way for compact and high-performance laser sources.
    • The use of graphene-oxide as an output coupler in PQS operation proved effective for achieving short pulse durations.