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Tunable Multiwavelength Fiber Laser Employing a Comb Filter Based on a Polarization-Diversity Loop Configuration
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- Authors
- Il Yong Yoon, Yong Wook Lee, Jae Hoon Jung, Byoung Ho Lee
- Issue Date
- 2006-04
- Citation
- IEEE/OSA Journal of Lightwave Technology, v.24, no.4, pp.1805-1811
- ISSN
- 0733-8724
- Publisher
- IEEE, OSA
- Language
- English
- Type
- Journal Article
- Abstract
- A tunable multiwavelength fiber laser based on a semiconductor optical amplifier (SOA) is newly proposed. The proposed fiber laser employs a fiber comb filter based on a polarization-diversity loop configuration (PDLC) for the multiwavelength selection. The spectral characteristic of the comb filter is graphically explained by tracing the state of polarization (SOP) of the light propagating through the filter on the Poincare sphere. Particularly, the method of adjusting the filter characteristics is established with the help of the Poincare-sphere representation. The experimental results show that 18 laser lines oscillate with the signal to amplified spontaneous emission noise ratio over 25 dB. Particularly, all of the laser lines with a fixed channel spacing of ~ 0.8 nm can be continuously shifted by adjusting only a wave plate contained within the filter. © 2006 IEEE.
- KSP Keywords
- Channel spacing, Comb filter, Filter characteristics, Poincare sphere, Polarization-diversity loop configuration, Semiconductor optical amplifiers(SOAs), Spectral characteristics, amplified spontaneous emission noise, multiwavelength fiber laser, state of polarization, wave plate