论文部分内容阅读
基于多模光纤(MMF)引入的偏振烧孔(PHB)效应,研制了一种环形双波长掺铒光纤(EDF)激光器。单模光纤(SMF)-MMF-SMF组成的结构使MMF不同偏振方向的反射模在波长上分开,利用PHB效应实现双波长的输出,输出波长间隔可通过改变MMF的长度改变。实验对比了1.6 m和3.0 m长的MMF输出波谱特性,结果表明,通过增加MMF的长度,不但可以使输出波长的波长间隔变小,而且输出功率也会有一定的提高。本文研制的激光器,通过PHB效应以及偏振相关隔离器(PDI)和偏振控制器(PC)的影响,在常温下实现了消光比为55 dB、边模抑制比为53 dB以及输出功率为-2 dBm的两个连续波长的稳定输出。
Based on the PHB effect introduced by multimode fiber (MMF), an annular dual-wavelength EDF laser was developed. The SMF-MMF-SMF consists of a structure that separates the reflective modes of the MMF in different polarization directions by wavelength and uses a PHB effect to achieve dual-wavelength output. The output wavelength spacing can be changed by changing the length of the MMF. Experimental results show that the MMF output spectrum characteristics of 1.6 m and 3.0 m long are compared. The results show that by increasing the length of the MMF, not only can the wavelength interval of the output wavelength be reduced, but also the output power can be improved to some extent. The laser developed in this paper achieves an extinction ratio of 55 dB, a side mode rejection ratio of 53 dB and an output power of -2 at room temperature under the influence of PHB effect and polarization-dependent isolator (PDI) and polarization controller (PC) Steady output of two consecutive wavelengths in dBm.