论文部分内容阅读
掺铒光纤放大自发辐射(ASE)光源广泛应用于光纤传感、通信、精密测量等领域。光噪声在长期连续工作时对后续检测或测量系统的精度和灵敏度影响很大,但至今少见报道。在此,利用加速老化系统对ASE光源的光路部分进行343 K加速老化实验,并在过程中原位监视了其光噪声的演化情况。根据阿伦尼斯模型,换算得到ASE光源在室温环境下连续工作期间,前3200 h内其光信号噪声下降了约0.0743μV2Hz-1,而后的44416 h中缓慢增加了0.0338μV2Hz-1。在老化前后,光噪声均为光功率的二次函数,通过拟合可得到,其二次项系数α(或称为光相对强度噪声系数)和一次项系数β(或称为光散粒噪声系数)。经过老化实验,两系数α和β都相应的增加,其中α增加了0.010μV2μW-2Hz-1,β增加了0.054μV2μW-1Hz-1。同时经过老化实验,ASE光源光谱发生形变且不可恢复。
Erbium-doped fiber amplification spontaneous emission (ASE) light source is widely used in optical fiber sensing, communications, precision measurement and other fields. Optical noise in the long-term continuous work on the subsequent detection or measurement system accuracy and sensitivity of a great impact, but so far rarely reported. In this paper, accelerated aging system was used to accelerate the optical path of ASE light source at 343 K, and the evolution of optical noise was monitored in situ during the process. According to the Arrhenius model, the ASE light source is converted into a continuous working environment at room temperature, the optical signal noise decreased by about 0.0743μV2Hz-1 in the first 3200h, and then slowly increased by 0.0338μV2Hz-1 in 44,416h. Before and after aging, the optical noise is a quadratic function of the optical power, which can be obtained by fitting. The quadratic coefficient α (or relative optical noise intensity) and the coefficient β of the primary coefficient (also called optical shot noise coefficient). After aging experiment, both coefficients α and β increased correspondingly, α increased 0.010μV2μW-2Hz-1 and β increased 0.054μV2μW-1Hz-1. At the same time, after aging experiment, the spectrum of ASE light source is deformed and can not be recovered.