Patent ID: 8416416

Claim:
A Surface Plasmon Resonance (SPR) measuring method, comprising the steps of: (1) providing a linear-polarized, coherent broadband pulsed light beam to incident upon a surface of a sample under detection of a SPR sensing device, wherein the coherent broadband pulsed light beam is caused to reflect from the surface of the sample as a reflected light beam; (2) applying a time-domain monotonous chirp to the coherent broadband pulsed light beam or the reflected light beam, wherein applying the time-domain monotonous chirp results in a time-domain monotonously chirped light beam; and (3) obtaining wavelength information of the SPR, wherein obtaining the wavelength information comprises: detecting the time-domain monotonously chirped light beam affected by the SPR effect to obtain a first time-domain signal, and detecting the time-domain monotonously chirped light beam unaffected by the SPR effect to obtain a second time-domain signal, wherein wavelength information of the SPR is obtained according to the first time-domain signal and the second time-domain signal.