High-sensitivity optical vector network analyzer based on stimulated Brillouin scattering

Abstract

The invention discloses a high-sensitivity optical vector network analyzer based on stimulated Brillouin scattering. The high-sensitivity optical vector network analyzer based on the stimulated Brillouin scattering comprises a narrow-linewidth laser device, an optical coupler, a polarization controller, a strength modulator, an optical isolator, a filter, a chromatic dispersion displacement optical fiber, a circulator, a photoelectric detector, a vector network analyzer body, a microwave signal source and an optical amplifier. According to the high-sensitivity optical vector network analyzer based on the stimulated Brillouin scattering, carrier waves of an optical signal obtained after optical filtering are attenuated through stimulated Brillouin scattering, test errors caused by high-order edges are eliminated through two testing amplitude and phase responses of a photon passive device, and thus the testing precision of the optical vector network analyzer is improved.

Description

technical field [0001] The invention belongs to the field of microwave photonics, in particular to a high-sensitivity optical vector network analyzer based on the stimulated Brillouin scattering effect of optical fiber. Background technique [0002] Microwave photonics is an interdisciplinary subject that combines microwave technology and photonic technology proposed in the 1970s. It takes into account the flexibility of microwave technology and the broadband and low loss characteristics of photonic technology. The optical vector network analyzer is of great significance in the testing of passive components (fiber gratings, optical filters). On the one hand, it combines the high-resolution characteristics of the microwave vector network analysis, on the other hand, it combines the broadband of the photonic system. and low loss characteristics. Optical vector network analysis is widely used in the testing of high-Q filters, which can simultaneously measure the magnitude and ...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of accurately and highly sensitively testing the amplitude and phase response of high-Q photonic passive filters, the present invention proposes a high-sensitivity optical vector network analyzer based on the stimulated Brillouin scattering effect of optical fibers, which is based on optical fiber The stimulated Brillouin scattering effect in the optical filter makes the carrier of the optical signal after optical filtering be attenuated by stimulated Brillouin scattering

Images