Multiwavelength fiber laser with ultradense wavelength spacing based on inhomogeneous loss with assistance of nonlinear polarization rotation

作者：Zhang, Zuxing^*; Kuang, Qingqiang; Sang, Minghuang; Ye, Zhiqing; Nie, Yiyou

来源：Optics Communications, 2010, 283(2): 254-257.

DOI：10.1016/j.optcom.2009.09.059

• Fiber laser
• Multiwavelength
• Erbium-doped fiber

We demonstrate a multiwavelength fiber laser with ultradense wavelength spacing and ultrabroad bandwidth based on inhomogeneous loss mechanism with assistance of nonlinear polarization rotation. The inhomogeneous loss, implemented by incorporating a section of highly nonlinear fiber (HNLF) and a Sagnac filter in the laser cavity, can balance mode competition in erbium-doped fiber and result in ultradense multiwavelength generation. The bandwidth of the multiwavelength spectrum is greatly broadened owing to the intensity-dependent loss induced by nonlinear polarization rotation. Stable multiwavelength lasing with wavelength spacing of 0.08 nm and wavelength number up to 254 is achieved at room temperature. Moreover, multiwavelength tuning is realized through modifying polarization-dependent cavity loss.

• 出版日期2010-1-15
• 单位江西师范大学