Dual-Wavelength Erbium-Doped Fibre Ring Laser by Cascading Tunable Bandpass Filter with Bandstop Filter

Chin. Phys. Lett.

2007, Vol. 24

Issue (11): 3145-3148 DOI:

Original Articles

Dual-Wavelength Erbium-Doped Fibre Ring Laser by Cascading Tunable Bandpass Filter with Bandstop Filter

CHEN Guo-Jie^1,2;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

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CHEN Guo-Jie, HUANG De-Xiu, ZHANG Xin-Liang et al 2007 Chin. Phys. Lett. 24 3145-3148

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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.

Keywords: 42.55.Wd 42.60.Pk

Received: 22 July 2007 Published: 23 October 2007

PACS:	42.55.Wd	(Fiber lasers)
	42.60.Pk	(Continuous operation)

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2007/V24/I11/03145

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	CHEN Guo-Jie
	HUANG De-Xiu
	ZHANG Xin-Liang
	CAO Hui

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