Title :
Second-order harmonic distortion and optimal fiber length in erbium-doped fiber amplifiers
Author :
Liu, Cheng-Kuang ; Jou, Jau-Ji ; Lai, Fu-Shun
Author_Institution :
Dept. of Electron. Eng., Nat. Taiwan Inst. of Technol., Taipei, Taiwan
Abstract :
The gain of an erbium-doped fiber amplifier (EDFA) operating in the kHz regimes and its second-order harmonic distortion (SBD) are studied. Using the rate and beam-propagation equations, we have shown the dependences of the distortion on the pump power, the modulation frequency, and the position along the fiber. Moreover, it is found that the SHD is the smallest when the fiber has an optimal length for the maximum gain. A relation between the optimal length and fiber parameters is presented for calculating easily the optimal fiber length in an EDFA.
Keywords :
erbium; fibre lasers; harmonic distortion; optical fibre testing; optical modulation; optical noise; optical pumping; optimisation; beam-propagation equations; erbium-doped fiber amplifier gain; erbium-doped fiber amplifiers; fiber parameters; maximum gain; modulation frequency; optimal fiber length; optimal length; pump power,; second-order harmonic distortion; Absorption; Distortion measurement; Equations; Erbium; Erbium-doped fiber amplifier; Frequency measurement; Gain measurement; Harmonic distortion; Power amplifiers; Power measurement;
Journal_Title :
Photonics Technology Letters, IEEE
