Switchable multi-wavelength fiber laser based on modal interference

doi:10.1088/1674-1056/24/8/084201

Abstract A comb fiber filter based on modal interference is proposed and demonstrated in this paper. Here two cascaded up-tapers are used to excite the cladding mode, and a core-offset jointing point is used to act as an interference component. Experimental results show that this kind of structure possesses a comb filter property in a range of the C-band. The measured extinction ratio is better than 12 dB with an insertion loss of about 11 dB. A switchable multi-wavelength erbium-doped fiber laser based on this novel comb filter is demonstrated. By adjusting the polarization controller, the output laser can be switched among single-, dual-, and three-wavelengths with a side mode suppression ratio of better than 45 dB.

Keywords: fiber laser up-taper core-offset modal interferometer

Received: 13 December 2014
Revised: 28 January 2015
Accepted manuscript online:

PACS:	42.25.Hz	(Interference)
	42.55.Wd	(Fiber lasers)

Corresponding Authors: Ma Lin
E-mail: lin.ma.wf@gmail.com

Cite this article:

Ma Lin (马林), Sun Jiang (孙将), Qi Yan-Hui (齐艳辉), Kang Ze-Xin (康泽新), Jian Shui-Sheng (简水生) Switchable multi-wavelength fiber laser based on modal interference 2015 Chin. Phys. B 24 084201

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