A high peak power all-fibre pulsed source at 1.53 μm, based on
an amplified Q-switched fibre laser is presented. Peak powers higher
than 2 kW and pulsewidths of ~20ns at repetition rates up to 1 kHz are
demonstrated. Pumped with a single compact pump source (MOPA), this
device constitutes a very powerful field pulse generator
"Indexing terms: Narrow linewidth, fibre loop lasers, Q-switched lasers Introduction: Q-switched Erbium doped fibre lasers at the wavelength around 1.55µm with Fabry-Perot cavities     and ring cavities   have been the subject of intense research. These lasers are useful for applications such as sensing and laser range finding. "
[Show abstract][Hide abstract] ABSTRACT: The authors report the operation of a single-frequency,
diode-pumped laser in CW operation with a linewidth of 10 kHz, which
provides a prelase for a narrow linewidth Q-switched laser. This was
achieved by incorporating an unpumped low Er<sup>3+</sup>-doped fibre.
In Q-switched operation, a linewidth of <60 MHz is reported for
pulses of 1 μs at a repetition rate of 960 Hz
[Show abstract][Hide abstract] ABSTRACT: The authors report a narrow linewidth, diode pumped, high power
Q-switched erbium doped fibre laser for distributed temperature sensing
applications using the Landau-Placzek ratio method. An output coupler
consisting of an in-fibre Bragg grating enables narrow linewidth
operation. A linewidth of 1.3 GHz is reported with a peak power of 100 W
and a pulse width of 20 ns at a repetition rate of 200 Hz
[Show abstract][Hide abstract] ABSTRACT: In this work we analyze the behavior of an erbium-doped fiber laser which, through a simple scheme, allows the generation of Q-switched laser output in the 1550 nm spectral region. Excitation of the active medium is performed in the 980 nm pump band with a cw semiconductor laser source. Two fiber Bragg gratings acting as mirrors of the Fabry-Perot laser cavity were used. One of this grating was mounted over a piezoelectric (PZT) element. By applying voltage pulses to the piezoelectric, the laser cavity was sintonized and Q-switched laser pulses of 55 mW peak powers were obtained. Typical laser emission had temporal widths of 3 microsecond(s) and an optical bandwidth of 0.15 mW peak powers were obtained. Typical laser emission had temporal widths of 3 microsecond(s) and an optical bandwidth of 0.15 nm, when the system operated at approximately 20 kHz repetition rates. Different results were observed depending on the pumping level of the active medium and on the amplitude and frequency of the signal applied on the PZT.
Proceedings of SPIE - The International Society for Optical Engineering 08/2001; DOI:10.1117/12.437066 · 0.20 Impact Factor
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