Abstract
In this paper, we present a frequency-doubled pulsed Yb-doped fiber amplifier exhibiting Fourier-transform limited 10-ns pulses at a repetition rate of up to 5 kHz. The amplifier is seeded by an external cavity diode laser whose output is chopped into light pulses of 10- to 1200-ns duration. The first stage is operated with a single-mode fiber, while the other two stages employ multi-mode double clad fibers. Output energies of up to 516 μJ per pulse have been recorded. The output power is limited by the onset of stimulated Brillouin scattering. As an example of the possible applications, we demonstrate the temperature measurement of water by Brillouin scattering employing the frequency-doubled radiation from the amplifier.
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Schorstein, K., Walther, T. A high spectral brightness Fourier-transform limited nanosecond Yb-doped fiber amplifier. Appl. Phys. B 97, 591–597 (2009). https://doi.org/10.1007/s00340-009-3691-9
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DOI: https://doi.org/10.1007/s00340-009-3691-9