PbS quantum dot fiber amplifier based on a tapered SMF fiber

PbS quantum dot fiber amplifier based on a tapered SMF fiber

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 10.5dB, with a 160-nm broad bandwidth of at 1530-nm center w...

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Veröffentlicht in:Optics communications 2012-06, Vol.285 (13-14), p.3222-3227
Hauptverfasser: Guo, Hairun, Pang, Fufei, Zeng, Xianglong, Wang, Tingyun
Format: Artikel
Sprache:eng
Schlagworte:
Amplification
Amplifiers
Evanescent wave
Fiber amplifier
Fiber optics
Fibers
Gain
Noise levels
Optical fibers
Quantum dots
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Zusammenfassung: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 10.5dB, with a 160-nm broad bandwidth of at 1530-nm center wavelength, is achieved. The gain efficiency is over 4dB/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.
ISSN:0030-4018
1873-0310
DOI:10.1016/j.optcom.2012.02.075