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Related Experiment Video

Updated: Jun 16, 2026

In vivo Optogenetic Stimulation of the Rodent Central Nervous System
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Low-threshold transversely excited NdP(5)O(14) laser.

S R Chinn, J W Pierce, H Heckscher

    Applied Optics
    |February 19, 2010
    PubMed
    Summary

    This study measured the threshold and efficiency of a neodymium laser using different excitation methods. Optimized excitation achieved low thresholds and efficient optical power conversion for this laser material.

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    Area of Science:

    • Optics and Photonics
    • Laser Physics
    • Materials Science

    Background:

    • Neodymium-doped materials are crucial for laser applications.
    • Efficient excitation methods are key to optimizing laser performance.
    • Understanding laser thresholds and efficiencies informs device design.

    Purpose of the Study:

    • To measure the threshold and efficiency of a transversely excited, continuous-wave (cw) NdP(5)O(14) laser.
    • To investigate the impact of different excitation wavelengths (0.58 µm and 0.8 µm) on laser performance.
    • To calculate and experimentally verify laser diode-pumped thresholds and efficiencies.

    Main Methods:

    • Experimental measurement of laser threshold and efficiency using dye laser and semiconductor laser excitation.
    • Data fitting to determine threshold dependence on excitation wavelength.
    • Calculation of thresholds for transverse excitation using LEDs and laser diodes.
    • Quasi-continuous-wave (cw) lasing achieved using an Al(x)Ga(1-x)As double-heterostructure laser diode pump.

    Main Results:

    • Thresholds were measured for 0.58 µm and 0.8 µm excitation.
    • Calculated thresholds for transverse excitation ranged from 4-8.5 mW at 0.80 µm.
    • Quasi-cw lasing demonstrated with thresholds around 7 mW.
    • Optical power conversion efficiency reached approximately 7%.

    Conclusions:

    • Transversely excited NdP(5)O(14) lasers can achieve low thresholds with appropriate pumping.
    • Semiconductor laser diode pumping offers an efficient method for exciting NdP(5)O(14) lasers.
    • The results provide valuable data for the development of efficient NdP(5)O(14) laser devices.

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