Two high-order superfine comb filters based on HiBi Fiber Ring

• Main Authors: Tian Jiayang, Wu Xiangnong
• Format: Article
• Language: English
• Published: Academic Journals Center of Shanghai Normal University 2017-02-01
• Series: Journal of Shanghai Normal University (Natural Sciences)
• Subjects: high bifringence fiber; superfine filter; Sagnac ring; comb filter
• Online Access: http://qktg.shnu.edu.cn/zrb/shsfqkszrb/ch/reader/view_abstract.aspx?file_no=20170111&flag=1

Considering optical filter based on HiBi fiber generally has one input and one output with the fixed interval of the wavelength,this paper designs two new tunable high-order superfine comb filters based on HiBi fiber Sagnac ring.They have the particular features of one input and two outputs with superfine comb spectra.They also can be tuned flexibly.Structurally,they consists of polarization controllers (PC) \ polarization maintaining fibers (PMF) and 2 or 3 pieces of HiBi fiber.Using the JONES matrix theory,theoretical models have been established and two output transmission characteristics have been detailed studied.For the proposed two-order filter,the influences of polarization angles are studied when the lengths of HiBi fiber are the same.For the proposed three-order filter,the influences of the lengths of HiBi fiber are studied.Simulation results show that our designs may be used for wavelength selection output.