Stable and uniform multiwavelength erbium-doped fiber laser using nonlinear polarization rotation.

A novel and simple technique, based on nonlinear polarization rotation (NPR) effect, to generate stable multiwavelength oscillations in an erbium-doped fiber laser is proposed and successfully demonstrated. The NPR effect effectively induced intensity- and wavelength-dependent loss to alleviate mode competition caused by homogeneous gain broadening in erbium-doped fibers. Up to 28-wavelength lasing operation with wavelength spacing of 0.8 nm has been achieved. The outputs had uniform power distributions, and the power fluctuation in each wavelength is smaller than 0.2 dB within a period of an hour.

[1]  C. Lou,et al.  Stable multiwavelength dispersion-tuned actively mode-locked erbium-doped fiber ring laser using nonlinear polarization rotation , 2006, IEEE Photonics Technology Letters.

[2]  Yuan Shu-zhong,et al.  A Polarization Controlled Switchable Multiwavelength Erbium-Doped Fibre Laser , 2004 .

[3]  Yizhi Gao,et al.  Theoretical and experimental study of pulse-amplitude-equalization in a rational harmonic mode-locked fiber ring laser , 2001 .

[4]  Li Yuhua,et al.  Novel method to simultaneously compress pulses and suppress supermode noise in actively mode-locked fiber ring laser , 1998, IEEE Photonics Technology Letters.

[5]  Chao Lu,et al.  Switchable and tunable multiwavelength erbium-doped fiber laser with fiber Bragg gratings and photonic crystal fiber , 2005, IEEE Photonics Technology Letters.

[6]  D.Yu. Stepanov,et al.  Multiple wavelength generation with Brillouin/erbium fiber lasers , 1996, IEEE Photonics Technology Letters.

[7]  Lou Cai-Yun,et al.  Novel method to simultaneously compress pulses and suppress supermode noise in actively mode-locked fiber ring laser , 1998 .

[8]  J. Lit,et al.  Switchable multiwavelength erbium-doped fiber laser with cascaded fiber grating cavities , 2002, IEEE Photonics Technology Letters.

[9]  R. Laming,et al.  Triple-frequency operation of an Er-doped twincore fiber loop laser , 1996, IEEE Photonics Technology Letters.

[10]  H. Haus,et al.  Self-starting additive pulse mode-locked erbium fibre ring laser , 1992 .