Abstract
Passively mode-locked fiber lasers are attractive sources for high speed optical fiber communications. In the past several years, there has been much effort to generate ultrashort pulses using various methods based on erbium-doped fibers.1−3 Generation of stable soliton pulses from the typical passive modelocking schemes requires reduction of the pump power close to the threshold level after initiation of the mode-locking with relatively high pump powers. Thus, the stable solitons have a small pulse energy, typically less than 100 pJ. In this paper, we present a passive mode-locked fiber laser with a Sagnac loop reflector and a Faraday rotator mirror delivering laser pulses of pulse energy of about 0.5 nJ and pulse width of a few hundreds femtosecond.
© 1996 Optical Society of America
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