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Elder, 2007 - Google Patents

High average power thulium fibre laser pumped mid-IR source

Elder, 2007

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Document ID
10278825906239566435
Author
Elder I
Publication year
Publication venue
Technologies for Optical Countermeasures IV

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Snippet

Efficient generation of high average power mid-IR laser radiation is reported. Using a 50 W thulium fibre laser to pump a Q-switched Ho: YAG laser 27.3 W of average output power is achieved with an M 2 of 1.5. The holmium laser is used to pump a ZGP OPO generating 12.6 …
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    • H01S3/09—Processes or apparatus for excitation, e.g. pumping
    • H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
    • H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
    • H01S3/0941—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a laser diode
    • H01S3/09415—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a laser diode the pumping beam being parallel to the lasing mode of the pumped medium, e.g. end-pumping
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    • H01S3/067—Fibre lasers
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    • H01S3/067—Fibre lasers
    • H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
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    • H01S3/16—Solid materials
    • H01S3/1601—Solid materials characterised by an active (lasing) ion
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    • H01S3/106—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling a device placed within the cavity
    • H01S3/1063—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling a device placed within the cavity using a solid state device provided with at least one potential jump barrier
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    • H01S3/108—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling a device placed within the cavity using a non-linear optical device, e.g. exhibiting Brillouin- or Raman-scattering
    • H01S3/109—Frequency multiplying, e.g. harmonic generation
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    • H—ELECTRICITY
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    • H01S3/117—Q-switching using acousto-optical devices
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    • H01S3/14—Lasers, i.e. devices for generation, amplification, modulation, demodulation, or frequency-changing, using stimulated emission, of infra-red, visible, or ultra-violet waves characterised by the material used as the active medium
    • H01S3/16—Solid materials
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    • H01S3/164—Solid materials characterised by a crystal matrix garnet
    • H—ELECTRICITY
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    • H01S3/08—Construction or shape of optical resonators or components thereof
    • H01S3/081—Construction or shape of optical resonators or components thereof comprising more than two reflectors
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    • H01S3/23—Arrangements of two or more lasers not provided for in groups H01S3/02 - H01S3/22, e.g. tandem arrangements of separate active media
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    • H01S3/30—Lasers, i.e. devices for generation, amplification, modulation, demodulation, or frequency-changing, using stimulated emission, of infra-red, visible, or ultra-violet waves using scattering effects, e.g. stimulated Brillouin or Raman effects

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