Multiwall carbon nanotube polyvinyl alcohol-based saturable absorber in passively Q-switched fiber laser
In this work, we demonstrated a compact Q-switched erbium-doped fiber laser capable of generating high-energy pulses using a newly developed multiwall carbon nanotube (CNT) polyvinyl alcohol (PVA) thin film based saturable absorber. Q-switched pulse operation is obtained by sandwiching the thin f...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | en |
| Published: |
OSA Publishing
2014
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/84298/1/Multiwall%20carbon%20nanotube%20polyvinyl%20alcohol-based.pdf http://irep.iium.edu.my/84298/ https://www.osapublishing.org/ao/abstract.cfm?uri=ao-53-30-7025 |
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| Summary: | In this work, we demonstrated a compact Q-switched erbium-doped fiber laser capable of generating
high-energy pulses using a newly developed multiwall carbon nanotube (CNT) polyvinyl alcohol
(PVA) thin film based saturable absorber. Q-switched pulse operation is obtained by sandwiching the
thin film between two fiber ferrules forming a saturable absorber. A saturable absorber with 1.25 wt.
% of PVA concentration shows a consistency in generating pulsed laser with a good range of tunable
repetition rate, shortest pulse width, and produces a high pulse energy and peak power. The pulse train
generated has a maximum repetition rate of 29.9 kHz with a corresponding pulse width of 3.49 μs as a
function of maximum pump power of 32.15 mW. The maximum average output power of the Q-switched
fiber laser system is 1.49 mW, which translates to a pulse energy of 49.8 nJ. The proposed method of
multiwall CNT/PVA thin film fabrication is low in cost and involves uncomplicated processes. |
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