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Chin. Phys. B, 2015, Vol. 24(8): 084201    DOI: 10.1088/1674-1056/24/8/084201
ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS Prev   Next  

Switchable multi-wavelength fiber laser based on modal interference

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)
Key Laboratory of All Optical Network & Advanced Telecommunication Network of EMC, Beijing Jiaotong University, Beijing 100044, China
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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