A PbS quantum dots fiber amplifier excited by evanescent wave.
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.
Pang
Fufei
F
The Key Lab of Specialty Fiber Optics and Optical Access Network, Shanghai University, Shanghai, P.R. China.
Sun
Xiaolan
X
Guo
Hairun
H
Yan
Jiwen
J
Wang
Jing
J
Zeng
Xianglong
X
Chen
Zhenyi
Z
Wang
Tingyun
T
D005336:Fiber Optic Technology / Q000295:instrumentation*; D007854:Lead; D036103:Nanotechnology / Q000295:instrumentation; D055100:Optical Fibers; D045663:Quantum Dots; D013440:Sulfides
D013440:Sulfides; C018391:lead sulfide; D007854:Lead