Title :
Modulation instability in erbium-doped fiber amplifiers
Author :
Agrawal, Govind P.
Author_Institution :
Inst. of Optics, Rochester Univ., NY, USA
fDate :
6/1/1992 12:00:00 AM
Abstract :
The onset of modulation instability in erbium-doped fiber amplifiers (EDFAs) is studied through a stability analysis of the underlying nonlinear Schrodinger equation. The existence of gain in EDFAs lowers the threshold for modulation instability considerably compared with the case of undoped fibers. Modulation instability generates multiple pulses when a single pulse is amplified. It can also create multiple subpulses in mode-locked fiber lasers, a feature observed experimentally. Numerical simulations show that EDFAs can convert a continuous-wave optical signal into a train of high-repetition rate femtosecond pulses.<>
Keywords :
Schrodinger equation; erbium; fibre lasers; laser theory; nonlinear optics; optical modulation; CW optical signals; Er doped fibre amplifiers; high-repetition rate femtosecond pulses; laser mode locking; mode-locked fiber lasers; modulation instability; multiple pulses; multiple subpulses; pulse amplification; single pulse; stability analysis; underlying nonlinear Schrodinger equation; Erbium-doped fiber amplifier; Erbium-doped fiber lasers; Laser mode locking; Numerical simulation; Optical pulse generation; Pulse amplifiers; Pulse modulation; Schrodinger equation; Stability analysis; Ultrafast optics;
Journal_Title :
Photonics Technology Letters, IEEE
