Triple-wavelength Switchable Multiwavelength Erbiumdoped Fiber Laser Based on a Highly Nonlinear Photonic Crystal Fiber
We propose and experimentally investigate a novel scheme for a triple-wavelength switchable multiwavelength erbium-doped fiber laser based on a highly nonlinear photonic crystal fiber incorporating a multiply-phase-shifted fiber Bragg grating. A nonlinear optical loop mirror based on a highly nonlinear photonic crystal fiber is exploited to suppress the homogeneous line broadening of an erbium-doped fiber amplifier and to provide the triple lasing wavelength switchability. A multiplyphase-shifted fiber Bragg grating with three channels, depending on the number of phase-shifted segments, is implemented to establish a multichannel filter and to generate the multiwavelength output. A high-quality multiwavelength output with a high extinction ratio of～45 dB and a high output flatness of～0.3 dB is realized. The switching performance to provide lasing-wavelength selectivity can be realized by using a nonlinear polarization rotation based on a nonlinear optical loop mirror. The lasing wavelength can be switched individually by controlling both the polarization controller within the nonlinear optical loop mirror and the cavity loss. The proposed multiwavelength fiber laser can be operated in the single-, dual-, and triple-lasing wavelength states. Based on the bending technique, the lasing wavelength of the proposed multiwavelength erbium-doped fiber laser can be readilv controlled, and its tunabilitv was measured to be～7.2 nm/m-1.
Fiber laser Switchable fiber laser Multiwavelength fiber laser Erbium-doped fiber laser Fiber grating
Young-Geun Han
Department of Physics and Research Institute for Natural Sciences, Hanyang University, Seoul 133-791
国际会议
The 7th International Symposium on Advanced Photonic and Technology(第七届光子先进科学与技术国际会议)
上海
英文
1251-1255
2009-07-26（万方平台首次上网日期，不代表论文的发表时间）