Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1534010 | Optics Communications | 2015 | 5 Pages |
Abstract
We propose a novel all-fiber quasi-flat-top comb filter based on an in-line Sagnac interference. The transmission function of the proposed filter is theoretically analyzed using Jones transmit-matrix. And the influence of several factors on the output spectrum is experimentally demonstrated, such as the length of the two polarization-maintaining fibers (PMFs), the birefringence of PMFs, the rotatable angle of polarization controllers (PCs) and the temperature subjected to PMFs. A well-defined flat-top interference pattern as theoretically expected is achieved. The measured extinction ratio and free spectrum range (FSR) of the proposed filter are 25Â dB and 16Â nm, respectively. In addition, it has the advantages of good flattop transmission passband, high channel isolation, fully compatible with optical-fiber system and low cost. This kind of filter can be widely used in dense wavelength division multiplexing (DWDM) systems.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Liutong Yuan, Manli Hu, Qiangzhou Rong, Hao Sun, Libin Zhou, Shen Yang, Xiaolei Zhang, Zaihang Yang,