| Original Articles |
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A Room-Temperature Multiwavelength Erbium-Doped Fibre Laser by Exploiting Polarization Hole Burning |
| ZHANG Hao;XIONG Ling-Yun;DOU Qing-Ying;LI Yao;YU Ling;LIU Yan-Ge;LIU Li-Hui;YUAN Shu-Zhong;KAI Gui-Yun,
DONG Xiao-Yi |
| Institute of Modern Optics, Nankai University, Tianjin 300071 |
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| Cite this article: |
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ZHANG Hao, XIONG Ling-Yun, DOU Qing-Ying et al 2005 Chin. Phys. Lett. 22 122-124 |
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Abstract Multiwavelength operation of a linear cavity erbium-doped fibre laser (EDFL) is proposed and demonstrated. A 3-dB fibre loop mirror and a high birefringence (HiBi) fibre loop mirror are utilized as the cavity reflectors. By utilizing the wavelength-dependent polarization rotation induced by the HiBi fibre loop mirror and by using a fibre polarizer to control the intracavity polarization state, the polarization states of different wavelengths are diversified. Therefore, the polarization hole burning (PHB) effect has been greatly enhanced and the homogeneous broadening of erbium-doped fibre is suppressed to a large extent. By simply tuning a polarization controller, we experimentally obtained simultaneous lasing of four and five wavelengths with wavelength spacing of ～1.8nm and less than 2\,nm at room temperature, respectively. The repeated scans show that all of these lasers have good stability.
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| Keywords:
42.55.Wd
42.81.-i
42.81.Gs
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Published: 01 January 2005
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