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    Eye-safe fiber laser for long range 3D imaging applications

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    1616625.pdf (1.079Mb)
    Date
    2018
    Author
    Holmen, Lars Grønmark
    Rustad, Gunnar
    Haakestad, Magnus W.
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    Abstract
    We report an all-fiber Er/Yb master oscillator power amplifier at 1.55 μm, delivering 135 μJ pulses with 6 ns duration (full width at half-maximum) at 100 kHz pulse repetition frequency, limited by stimulated Brillouin scattering. The output contains <1% amplified spontaneous emission and has a beam quality of 𝑀�2=1.1. By seeding with a high-power distributed-feedback laser diode, only two fiber amplification stages are needed, which represents a low overall system complexity compared to reported sources of similar performance. With an optical-to-optical efficiency of 29% and a robust alignment-free design, the source is well suited for field applications in 3D imaging with a several-kilometer range, and we present results from using it in an in-house-developed scanning lidar system.
    URI
    http://hdl.handle.net/20.500.12242/1811
    DOI
    10.1364/AO.57.006760
    Description
    Holmen, Lars Grønmark; Rustad, Gunnar; Haakestad, Magnus W.. Eye-safe fiber laser for long range 3D imaging applications. Applied Optics 2018 ;Volum 57. s. 6760-6767
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