Stable Dual-Wavelength Fibre Laser with Bragg Gratings Fabricated in a Polarization-Maintaining Erbium-Doped Fibre |
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Authors: | WANG Lin YAN Feng-Ping MAO Xiang-Qiao JIAN Shui-Sheng |
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Affiliation: | Key Laboratory of All-Optical Networks and Advanced Communications Networks (Ministry of Education), Institute of Lightwave Technology, Beijing Jiaotong University, Beijing 100044 |
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Abstract: | A new polarization-independent dual-wavelength fibre laser by fabricating a uniform FBG and a chirped FBG in a polarization-maintaining erbium-doped fibre (PM-EDF) is proposed and demonstrated. The wavelength spacing is 0.18nm and the optical signal-to-noise ratio is greater than 50dB with pump power of 246mW. Chirped FBG is used to make the reflectivity wavelengths of two PM-FBGs match easier. Since both EDF and FBGs are polarization-maintaining without splices and the two wavelengths are polarization-independent, the maximum amplitude variation and wavelength shifts for both lasing wavelength with 3-min intervals over a period of six hours are less than 0.2dB and 0.005nm, respectively, which shows stable dual-wavelength output. |
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Keywords: | 42.55.Wd 42.81.Gs |
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