Abstract
We report on the optical properties of Bi-doped phosphosilicate fiber. The fiber with a core and a clad diameter of 7.75 µm and 125 µm, respectively, is fabricated in-house using the modified chemical vapor deposition (MCVD) with in-situ solution doping technique. The spectroscopic properties of the fabricated fiber are characterized in terms of absorption, emission and lifetime. The lifetime decay is measured to be 800 µs; indicating a good potential optical amplification in the range of 1300 to 1500 nm. A Bismuth-doped fiber amplifier (BDFA) operating within the O-band region was successfully demonstrated. At 1340 nm, a 14.8 dB gain is achieved with 300 mW pumping power.
Highlights
In recent years, a great deal of attention has been paid to Bismuth-doped fiber (BDF) as a new gain medium for optical amplifiers
The full amplified spontaneous emission (ASE) spectrum from 600–1700 nm is depicted in the inset of Figure 7
Results ions and Discussion and impurities in this case is that OH molecules can result in unsaturable loss (UL) phenomenon
Summary
A great deal of attention has been paid to Bismuth-doped fiber (BDF) as a new gain medium for optical amplifiers. The wide luminescence spectral range of BDF can be utilized to fill in the gap between 1260–1530 nm where no efficient rare-earth doped fiber amplifier exists [1]. The development of fiber amplifiers that can operate in the O-band region (1260–1360 nm) is important since silica fibers exhibit zero dispersion characteristics in that region. Optical amplifiers in the O-band region can potentially increase the transmission capacity for fiber optic communication systems [2]. A silica-based BDF amplifier operating at 1300 nm region exhibits number of advantages such as a broad amplification band with high efficiency [2]. A 1300nm optical amplifiers using Praseodymium-doped fibers are fluoride-based, which are brittle and less robust, to be spliced with existing standard silica fibers [3]
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