基于多波长光纤激光器和色散器件级联的微波光子带通滤波器  

Microwave Photonic Bandpass Filter Based on Multi-Wavelength Fiber Lasers and Cascaded Dispersion Devices

作　　者：张丽丽[1] 童峥嵘[1] 曹晔[1] 张卫华[1] 

机构地区：[1]天津理工大学薄膜电子与通信器件重点实验室,天津300384

出　　处：《中国激光》2014年第2期272-277,共6页Chinese Journal of Lasers

基　　金：天津市自然科学基金(11JCYBJC00100;13JCQNJC01800)

摘　　要：提出了一种基于多波长光纤激光器和色散器件级联的微波光子带通滤波器。该滤波器利用双折射光纤环镜对多波长激光器的输出信号进行整形,整形后的信号作为滤波器的抽头,实现滤波器的可重构性。将标准单模光纤(SSMF)和光纤延迟环级联作为延迟单元,实现滤波器的频率选择性。通过改变波长间隔或标准单模光纤的长度,实现滤波器的可调谐性。研究结果表明与只用SSMF作延迟单元相比,该微波光子滤波器的品质因数Q提高了182.26,3dB带宽减小了670MHz。A microwave photonic band-pass filter based on multi-wavelength laser and cascaded dispersion devices is proposed. To achieve the reconfigurable of the filter, a birefringence fiber loop mirror is used to shape the output signal of multi-wavelength laser shaping. The shaped signal is selected as the filter tap. The frequency selectivity of the filter is achieved by a delay unit which is the concatenation of standard single-mode fiber （SSMF） and fiber delay loop mirror. The tunability of the filter can be realized by changing the wavelength interval of the source or the length of the standard SSMF. The results show that the quality factor of the proposed microwave photonic filter increases by 182.26 and 3 dB bandwidth decreases by 670 MHz, compared to the filter only with SSMF as delay units.

关 键 词：光纤光学 多波长激光器 双折射光纤环镜 色散器件 高Q值 

分 类 号：O439[机械工程—光学工程]