In this study， a parallel testing system for optical devices， based on optical frequency-domain interferometry(OFDI)，is developed to address the challenge associated with traditional testing methods in balancing high testing efficiency with the detection of vector information(amplitude/phase). Space-division and time-division multiplexing are implemented as two parallel testing structures that respectively realize parallel extraction of cavity amplitude-phase responses of fiber ring resonators，fiber gratings，and microring resonators via structural separation in space and information separation in the time domain. The measured results are highly consistent with those measured by optical vector network analysis based on optical single-sideband modulation，and the frequency resolution of the proposed approach can reach a value of 6. 8 MHz. The effectiveness of the system was validated experimentally， and the results show that both schemes can characterize amplitude/phase responses of multiple optical devices in a single scan，thus improving the efficiency of the testing process significantly.