Dual-Wavelength Erbium-Doped Fibre Ring Laser by Cascading Tunable Bandpass Filter with Bandstop Filter
CHEN Guo-Jie1,2, HUANG De-Xiu1, ZHANG Xin-Liang1, CAO Hui2
1Wuhan National Laboratory for Optoelectronics, School of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 4300742School of Science, Foshan University, Foshan 528000
Dual-Wavelength Erbium-Doped Fibre Ring Laser by Cascading Tunable Bandpass Filter with Bandstop Filter
1Wuhan National Laboratory for Optoelectronics, School of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 4300742School of Science, Foshan University, Foshan 528000
摘要A novel fibre ring laser is proposed and successfully demonstrated. By cascading a tunable bandpass filter with a bandstop filter to construct the desired narrow dual-transmission-peak spectrum, and employing a segment of unpumped erbium-doped fibre as a saturable absorber, a stable fibre ring laser is achieved at room temperature. The proposed laser can operate in dual-wavelength with the wavelength spacing of 0.48nm and the extinction ratio more than 50dB or switch between the two wavelengths by adjusting a polarization controller. The stability is investigated experimentally and explained theoretically.
Abstract：A novel fibre ring laser is proposed and successfully demonstrated. By cascading a tunable bandpass filter with a bandstop filter to construct the desired narrow dual-transmission-peak spectrum, and employing a segment of unpumped erbium-doped fibre as a saturable absorber, a stable fibre ring laser is achieved at room temperature. The proposed laser can operate in dual-wavelength with the wavelength spacing of 0.48nm and the extinction ratio more than 50dB or switch between the two wavelengths by adjusting a polarization controller. The stability is investigated experimentally and explained theoretically.
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2007, Vol. 24 
