Gain modulation in erbium doped optical fibre by pulse pumping

An erbium doped fiber laser, which is optically pumped at a wavelength of 532nm from a frequency doubled Q-switched Nd-YAG laser, is described. Gain modulation due to the short (100ns) high rep rate (2KHz) pump pulses produces intense, short laser pulses at 1.538 mu m. The properties of this laser are examined theoretically and experimentally.<>