Single-frequency erbium-doped fiber amplifier with high energy gain at low repetition rates
Venkatapuram S. Sudarshanam,
Cang Jin,
Jeffrey W. Nicholson
Abstract:We report pulse energy of 1.6 mJ at 1 kHz repetition rate from a single-frequency fiber amplifier with high energy gain of 19 dB at 1560 nm, using a 2.4 m long, very-large mode area (VLMA) polarization-maintaining (PM) erbium-doped fiber with 50 µm core diameter and absorption of 50 dB/m, core-pumped with a CW, 1480 nm Raman fiber laser. The in-pulse power fraction was 85%. The FWHM of the output pulses was 1.48 s at 1 kHz repetition rate. At 150 Hz repetition rate, of interest in coherent wind LIDAR systems,… Show more
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