Open AccessNonlinearity Effect on Multiwavelength fiber laser based on Sagnac loop mirror interferometer
Author(s) -
Abdul Hadi Sulaiman,
Nur Maizatul Nadia Najamhuri,
Muhd Amirul Hafizi Sukor,
Amiruddin Ismail,
Fairuz Abdullah,
M. Z. Jamaludin
Publication year - 2021
Publication title -
jurnal optoelektronik
Language(s) - English
Resource type - Journals
ISSN - 2773-546X
DOI - 10.53655/joe.h7142c
Subject(s) - polarization controller , optics , extinction ratio , lasing threshold , fiber laser , interferometry , optical amplifier , materials science , laser , comb filter , physics , bandwidth (computing) , telecommunications , wavelength , computer science
This paper demonstrates a multiwavelength fiber laser (MWFL) with erbiumdoped fiber amplifier (EDFA) as gain medium and Sagnac loop mirror interferometer as filter. Stable and flat lasing spectrum was achieved when highly nonlinear fiber (HNLF) was inserted into the laser cavity. The number of lasing lines and extinction ratio (ER) was directly influenced by EDFA gain where at maximum setting, 14 lasing lines with ER of 19 dB were generated. The stable and flat spectrum achieved spanned about 1.6 nm. This is due to the induced intensity dependent loss mechanism in the cavity by adjusting the half-wave plate of the polarization controller in combination with the HNLF. The MWFL output showed peak power variation of about 2.1 dB within 100 minutes of observation time.