Tunable multiwavelength fiber laser based on bidirectional SOA in conjunction with Sagnac loop mirror interferometer
| Autor: | Fairuz Abdullah, Mohd Adzir Mahdi, Nelidya Md Yusoff, Abdul Hadi Sulaiman |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
General Physics and Astronomy 02 engineering and technology 01 natural sciences law.invention Optics Polarization controller Sagnac loop mirror interferometer law Fiber laser 0103 physical sciences Semiconductor optical amplifier 010302 applied physics Optical amplifier Extinction ratio business.industry Multiwavelength fiber laser 021001 nanoscience & nanotechnology Laser Polarization (waves) lcsh:QC1-999 Interferometry 0210 nano-technology business Lasing threshold lcsh:Physics |
| Zdroj: | Results in Physics, Vol 18, Iss, Pp 103301-(2020) |
| ISSN: | 2211-3797 |
| Popis: | A tunable multiwavelength fiber laser (MWFL) based on bidirectional semiconductor optical amplifier (SOA) in conjunction with a Sagnac loop mirror (SLM) interferometer is proposed. The best multiwavelength spectrum from this setup produces 164 lasing lines within 3 dB uniformity. The main study is to investigate the multiwavelength laser performance by varying the polarization state (PS) at two different locations of polarization controller (PC). Manipulation of a quarter-wave plate (QWP) of PC1 causes PS change before entering polarization-maintaining fiber (PMF) thus affecting the multiwavelength flatness and wavelength bandwidth. Meanwhile, manipulation of QWP of PC2 varied the output power of polarization beam splitter (PBS) and tuned the multiwavelength spectrum with almost similar performance. The multiwavelength tunability, extinction ratio (ER) difference and lasing lines difference is five nm, 2.4 dB and 48 when the QWP angle is adjusted from 0° until 70°, respectively. Lower SOA current reduced the multiwavelength flatness and number of lines. The laser output was found stable at a maximum of 0.31 dB power deviation during the 100 min of stability test. |
| Databáze: | OpenAIRE |
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