Title :
Er/sup 3+/-doped fiber amplifier pumped by 0.98 mu m laser diodes
Author :
Yamada, Makoto ; Shimizu, Makoto ; Takeshita, Tatsuya ; Okayasu, Masanobu ; Horiguchi, Masaharu ; Uehara, Shingo ; Sugita, Etsuji
Author_Institution :
NTT Opto-Electron. Lab., Ibaraki, Japan
Abstract :
The performance of an Er/sup 3+/-doped fiber amplifier pumped by 0.98 mu m InGaAs laser diodes (LDs) is reported. By using a fiber with low Er/sup 3+/ content and optimizing the fiber length, a maximum signal gain of 37.8 dB at 30-mW pump power was realized at a signal wavelength of 1.536 mu m. A maximum gain coefficient of 1.9 dB/mW at 14 mW pump power was achieved. It was found that the fiber amplifier pumped by the 0.98- mu m LDs is twice as efficient as that pumped by 1.48- mu m LDs, from the viewpoint of both required fiber length and the attained gain.<>
Keywords :
III-V semiconductors; erbium; fibre optics; gallium arsenide; indium compounds; laser transitions; optical pumping; semiconductor junction lasers; solid lasers; 0.98 micron; 1.536 micron; 14 mW; 30 mW; 37.8 dB; Er/sup 3+/-doped fiber amplifier; III-V semiconductor; InGaAs laser diodes; fiber length; maximum signal gain; performance; pump power; Diode lasers; Erbium; Laser excitation; Light sources; Optical coupling; Optical fiber amplifiers; Optical fiber couplers; Optical fiber polarization; Power amplifiers; Spectral analysis;
Journal_Title :
Photonics Technology Letters, IEEE
