Open AccessA PbS quantum dots fiber amplifier excited by evanescent wave
Author(s) -
Fufei Pang,
Xiaolan Sun,
Hairun Guo,
Jiwen Yan,
Jing Wang,
Xianglong Zeng,
Zhenyi Chen,
Tingyun Wang
Publication year - 2010
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.18.014024
Subject(s) - materials science , optics , amplified spontaneous emission , optoelectronics , optical amplifier , amplifier , dispersion shifted fiber , fiber laser , quantum dot , optical fiber , laser diode , laser , wavelength , diode , fiber optic sensor , physics , cmos
A PbS quantum dots (QDs) fiber amplifier was fabricated and characterized by using a standard single mode fiber (SMF) coupler. The fiber amplifier was fabricated by coating PbS QDs doped sol-gel films onto the tapered SMF coupler. Through the evanescent wave, the PbS quantum dots were excited. With a 980 nm wavelength laser diode (LD) as the pump, the fiber amplifier exhibited a wide band optical gain at 1310 nm with the largest gain as high as 10 dB. The amplified spontaneous emission (ASE) noise is very low resulted from the amplifier configuration of evanescent wave exciting, which is critical to improve the signal-to-noise ratio. Therefore the proposed fiber amplifier will find great potential in the fiber-optic communication systems.