Title :
Detailed theoretical and experimental investigation of high-gain erbium-doped fiber amplifier
Author :
Pedersen, Bo ; Dybdal, Kristen ; Hansen, Carsten Dam ; Bjarklev, Anders ; Povlsen, Jørn Hedegaard ; Vendeltorp-Pommer, Helle ; Larsen, Carl Christian
Author_Institution :
Electromagn. Inst., Tech. Univ. of Denmark, Lyngby, Denmark
Abstract :
A full-scale numerical model for the erbium-doped fiber amplifier has been developed that incorporates realistic index and erbium-concentration profiles as well as the spectral distribution of amplified spontaneous emission (ASE). The high accuracy of the model is demonstrated by comparison with a comprehensive set of data, including gain, ASE, and pump power, obtained for a well-characterized Er-Al-doped fiber. An absorption-to-emission cross-section ratio of 1.0 was measured at the gain peak. Pumping at 654 nm, the excited state absorption was observed to be insignificant. A high gain of 39.6 dB was achieved in the experiment.<>
Keywords :
erbium; fibre lasers; optical pumping; superradiance; 39.6 dB; 654 nm; Er concentration profiles; absorption-to-emission cross-section ratio; amplified spontaneous emission; excited state absorption; full-scale numerical model; gain peak; high-gain Er:fibre amplifier; laser pumping; pump power; refractive index profiles; spectral distribution; Absorption; Erbium-doped fiber amplifier; Fluorescence; Gain measurement; Laser excitation; Numerical models; Power amplifiers; Power distribution; Spontaneous emission; Wavelength measurement;
Journal_Title :
Photonics Technology Letters, IEEE
