title: Characterization of passive optical components with ultra-fast speed and high-resolution based on DD-OFDM.
abstract: The passive optical components with very fine structures in wavelength domain are very sensitive to the mechanical vibrations or thermal fluctuations. If the measurement speed is lower than the temperature and mechanical fluctuation, we cannot measure the dynamic characteristics of the optical components. In this paper, we propose and demonstrate a novel method with ultra-fast measurement speed and high-resolution based on optical channel estimation using direct-detected orthogonal frequency division multiplexing (DD-OFDM) signal, which can be used to measure the dynamic characteristics and fine structure of the passive optical components. In experiment, by using fast Fourier transform (FFT) and a low-cost electro-absorption modulated laser (EML), we can achieve the transfer function characteristics with 3.9 MHz resolution. Compared with the optical channel estimation using coherent OFDM signal reported before, the proposed measurement technique is cost-effective.
authors.affiliation: School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou 510006, China.
authors.forename: Banghong
authors.initials: B
authors.lastname: Guo
authors.forename: Tao
authors.initials: T
authors.lastname: Gui
authors.forename: Zhaohui
authors.initials: Z
authors.lastname: Li
authors.forename: Yuan
authors.initials: Y
authors.lastname: Bao
authors.forename: Xingwen
authors.initials: X
authors.lastname: Yi
authors.forename: Jianping
authors.initials: J
authors.lastname: Li
authors.forename: Xinhuan
authors.initials: X
authors.lastname: Feng
authors.forename: Songhao
authors.initials: S
authors.lastname: Liu
mesh_terms: D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007834:Lasers; D055096:Optical Devices; D012031:Refractometry / Q000295:instrumentation*; D013685:Telecommunications / Q000295:instrumentation*