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Q‐switched thulium‐doped fiber laser operating at 1920 nm region with multiwalled carbon nanotubes embedded in polyvinyl alcohol
Author(s) -
Ahmad M. T.,
Latiff A. A.,
Zakaria Z.,
Zen D. I. M.,
Saidin N.,
Haris H.,
Ahmad H.,
Harun S. W.
Publication year - 2014
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.28706
Subject(s) - materials science , polyvinyl alcohol , thulium , carbon nanotube , saturable absorption , fiber laser , laser , doping , fiber , optoelectronics , optics , composite material , physics
We demonstrate a Q‐switched Thulium‐doped fiber laser operating at approximately 1912 nm region using multiwalled carbon nanotubes (MWCNT) embedded in polyvinyl alcohol (PVA) as the passive saturable absorber (SA). The SA is fabricated by mixing the dispersed MWCNTs suspension into a PVA solution MWCNT and let the precursor to dry in the room temperature to form the film. The film is sandwiched between two FC/PC fiber connectors before it is incorporated in a ring laser cavity to produce self‐started pulse train with repetition rate that can tuned from 13.07 to 21.67 kHz as the 1552 nm pump power is increased from 302 to 382 mW. At 382 mW pump, the Q‐switched laser has a pulse width of 7.93 µs and pulse energy of 103.37 nJ. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:2817–2820, 2014