Switchable multiwavelength ytterbium-doped double-clad fiber laser based on a multimode fiber grating |
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Authors: | Fu Shenggui Si Libin Guo Zhancheng Yuan Shuzhong Zhao Ying Dong Xiaoyi |
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Affiliation: | College of Information Technical Science, Nankai University, Tianjin, China. fushenggui@gmail.com |
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Abstract: | A simple switchable multiwavelength double-clad fiber laser using a multimode fiber Bragg grating (MMFG) as a wavelength selective component is demonstrated. The MMFG is fabricated directly in the active double-clad fiber, resulting in low splicing loss and compact configuration. By properly adjusting the polarization controller in the cavity, the double-clad fiber laser can stably operate at different multiwavelength states at room temperature. At lower pump levels, the laser can be switched between single- and dual-wavelength operations, while at higher pump levels the laser can switch between dual- and triple-wavelength operations. The slope efficiency of the system is 41% with the maximum output power of 6.2 W. |
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