Multiwavelength erbium-doped fiber laser based on a nonlinear amplifying loop mirror assisted by un-pumped EDF.

A multiwavelength erbium-doped fiber (EDF) laser based on a nonlinear amplifying loop mirror (NALM) is proposed and experimentally demonstrated. The NALM provides intensity-dependent transmissivity to equalize different-wavelength powers and the transmission can be uniquely optimized by controlling the cavity loss associated with a section of un-pumped EDF, which also enhances the output signal-to-noise ratio (SNR). Through adjusting the polarization controllers (PCs), under only 70 mW pump power, up to 62-wavelength output with channel spacing of 0.45 nm has been achieved. Also, the lasing tunability and stability are verified.

[1]  Fengzhong Dong,et al.  Room-temperature multiwavelength erbium-doped fiber ring laser employing sinusoidal phase-modulation feedback. , 2003, Optics letters.

[2]  N. Park,et al.  24-line multiwavelength operation of erbium-doped fiber-ring laser , 1996, IEEE Photonics Technology Letters.

[3]  R. Boyd,et al.  Polarization effects and nonlinear switching in fiber figure-eight lasers. , 1994, Optics Letters.

[4]  Li Zhan,et al.  Multiwavelength fiber laser with fine adjustment, based on nonlinear polarization rotation and birefringence fiber filter. , 2008, Optics letters.

[5]  N J Doran,et al.  Switch inversion and polarization sensitivity of the nonlinear-optical loop mirror. , 1992, Optics letters.

[6]  Y. Xia,et al.  160-line multiwavelength generation of linear-cavity self-seeded Brillouin-Erbium fiber laser. , 2006, Optics express.

[7]  Hwa-Yaw Tam,et al.  Stable and uniform multiwavelength erbium-doped fiber laser using nonlinear polarization rotation. , 2006, Optics express.

[8]  H. Ahmad,et al.  Gain enhanced L-band Er/sup 3+/-doped fiber amplifier utilizing unwanted backward ASE , 2001, IEEE Photonics Technology Letters.

[9]  Sailing He,et al.  Channel-spacing-tunable multi-wavelength fiber ring laser with hybrid Raman and Erbium-doped fiber gains. , 2007, Optics express.

[10]  N. Dutta,et al.  Multiwavelength fiber ring laser based on a semiconductor and fiber gain medium. , 2009, Optics express.

[11]  G. Leuchs,et al.  Optimization of a Nonlinear Amplifying Loop Mirror for Amplitude Regeneration in Phase-Shift-Keyed Transmission , 2007, IEEE Photonics Technology Letters.

[12]  M.S. Demokan,et al.  Stable and broad bandwidth multiwavelength fiber ring laser incorporating a highly nonlinear photonic crystal fiber , 2005, IEEE Photonics Technology Letters.

[13]  Hwa-Yaw Tam,et al.  Multiwavelength erbium-doped fiber laser employing a nonlinear optical loop mirror , 2006 .