Optical Vector Network Analyzer With Improved Accuracy Based on Brillouin-Assisted Optical Carrier Processing

Abstract

We propose a new method to improve the accuracy of an optical vector network analyzer (OVNA) based on stimulated Brillouin scattering (SBS) in a dispersionshifted fiber (DSF). Generally, the measurement error of the OVNA mainly derives from the beat signals between adjacent optical sidebands. In this paper, the measurement error is significantly suppressed using a two-step measurement process. For the first measurement, both the transmission response of an optical device-under-test (ODUT) and the measurement error are recorded. For the second measurement, only the measurement error is obtained by suppressing the optical carrier using SBS in the DSF. The accurate transmission response of the ODUT is subsequently extracted by subtracting the error from the first measurement. The proposed method is theoretically investigated and experimentally demonstrated. The experimental results show that the accuracy of the OVNA is significantly improved.

Accurate Calibration and Measurement of Optoelectronic Devices

“…As a result, the beating between high-order sidebands will significantly constitute another source of the measurement errors. To improve the measurement accuracy of SSB-OVAs, M. Xue [70], [71] and W. Wang [72] have proposed methods based on the direct error subtraction, and we have proposed methods based on the suppression of even-order sidebands [73], [74]. Fig.…”