Core Viewpoint - The research team from the University of Science and Technology of China has developed a novel visible light vector spectrum analyzer, achieving high-precision, wide-bandwidth, and vectorized spectral measurement for integrated optical devices in the visible light range [2][4]. Group 1: Technological Advancements - The new vector spectrum analyzer operates within a wide spectral range of 518-541 nm and 766-795 nm, with a frequency resolution of 161 kHz, addressing the challenges in characterizing chip-level optical devices [4][5]. - The system utilizes an external cavity semiconductor laser combined with a periodically poled lithium niobate waveguide to achieve high-power, narrow-linewidth, and mode-hop-free continuous tunable laser output [4][5]. Group 2: Applications and Implications - This instrument fills a technological gap in wide-band vector spectral measurement for visible light integrated devices and has enabled the first measurement of microcavity dispersion characteristics across the near-infrared to visible light spectrum [5][8]. - The analyzer can resolve low repetition frequency optical frequency comb structures, meeting the measurement needs of advanced systems in high-precision optical communication, microwave frequency synthesis, and laser stabilization [5][8]. Group 3: Research Significance - The research results demonstrate the most advanced vector spectral measurement capabilities in the visible light range, providing critical support for the realization of chip-level optical atomic clocks [8]. - In the context of increasing global demand for high-precision, low-power, and deployable time-frequency standards, this development is expected to enhance the design efficiency, testing reliability, and engineering level of integrated optical devices [8].