Journal
OPTICS COMMUNICATIONS
Volume 285, Issue 13-14, Pages 3222-3227Publisher
ELSEVIER
DOI: 10.1016/j.optcom.2012.02.075
Keywords
Evanescent wave; Fiber amplifier; Quantum dots
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Funding
- National Natural Science of China [60937003]
- National Natural Science Foundation of China [60807031]
- Science and Technology Commission of Shanghai Municipality (STCSM) [0952nm06800]
- Shanghai Leading Academic Discipline Project [S30108]
- Shanghai Municipal Education Commission [10YZ12]
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A PbS quantum dot coated (QD-coated) tapered fiber amplifier with a broad bandwidth is theoretically demonstrated. The QD layer is coated on the surface of a tapered fiber and is excited by the evanescent wave of a pump. An optical gain of 10.5 dB, with a 160-nm broad bandwidth of at 1530-nm center wavelength, is achieved. The gain efficiency is over 4 dB/cm. This QD-tapered fiber amplifier has a concentration control of the QDs, a lower insertion loss, and shows good suppression of amplified spontaneous emission (ASE), while its structure is also quite simple. Therefore, the proposed fiber amplifier has great potential in fiber-optic communication systems. (c) 2012 Elsevier B.V. All rights reserved.
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