正色散掺铒光纤激光器耗散孤子共振脉冲特性研究

Dissipative Soliton Resonance Pulses in a Net-normal Dispersion Er-doped Fiber Laser

报道了一种工作在正色散区的耗散孤子共振脉冲锁模光纤激光器.详细研究了泵浦功率及偏振控制器状态对输出脉冲特性的影响.耗散孤子共振脉冲中心波长1 575nm,光谱宽度约6.66nm.当泵浦功率从220mW升高到554mW时,脉冲宽度从0.78ns增加到3.16ns,脉冲能量变化范围为3.5nJ至16.9nJ.泵浦功率409mW时,改变偏振控制器状态,脉冲宽度在1.6ns至3.2ns范围之间变化.实验中还研究了获得的耗散孤子共振纳秒矩形脉冲的啁啾特性,脉冲经过25m单模光纤传输,脉冲宽度无明显变化,脉冲为非线性啁啾.

The generation of dissipative soliton resonance pulses in a passively mode-locked net-normal dispersion Er-doped fiber laser is demonstrated.The dependence of pulse characteristics on pump power and the state of polarization controllers is investigated detailed. The central wavelength is 1 557 nm,with the 3 dB bandwith of 6.66 nm.By purely increasing the pump power from 220 mW to 554 mW,the pulse duration extends from 0.78 ns to 3.16 ns,while the pulse energy ranges from 3.5 nJ to 16.9 nJ.At the pump power of 409 mW,by carefully adjusting of the polarization controller’s oriention,pulse duration varies from 1.6 ns to 3.2 ns.Moreover,the chirp properties of the pulses is checked.No obvious change on the pulse profile was observed after propagation in a 25 m standard single mode communication fiber.