▎ 摘　　要

NOVELTY - The system (100) has a light source assembly (10), a wavelength division multiplexer (20), a sensor (30), a de-wavelength division multiplexer (40) and a spectrometer (50) that are arranged in sequence along an optical path. The light source assembly outputs linearly polarized light and pump light, the linearly polarized light and the pump light are inputted to the sensor through the wavelength division multiplexer, the output light of the sensor is received by the spectrometer after passing through the de-wavelength division multiplexer, and the spectrometer analyzes the spectrum. The sensor includes an optical fiber. An outer surface of the optical fiber is plated with a first plating layer, an outer surface of the first plating layer is coated with a second plating layer, and the sensor receives the modulated linearly polarized light and the pump light to excite the first plating layer to generate surface plasmon resonance. USE - Sensing system based on surface plasmon resonance used in biotechnology, drug screening, clinical, diagnosis, food testing and environmental testing, membrane biology and other fields. ADVANTAGE - The design of the sensor probe and the regulation of the pump light increase the sensitivity of the sensor to the detection of various environmental parameters, and broaden the use environment of the sensor probe to measure. The sensor can measure multiple environmental parameters at the same time and can solve the problem of multi-parameter cross-sensitivity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a detection method based on surface plasmon resonance. DESCRIPTION OF DRAWING(S) - The drawing shows a connection topology diagram of the sensing system. (Drawing includes non-English language text) Light source assembly (10) Wavelength division multiplexer (20) Sensor (30) De-wavelength division multiplexer (40) Spectrometer (50) Sensing system (100)