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Electrical and electronic engineering
We derive an analytic equation for a ratiometric wavelength measurement system and analyze the influence of the optical source signal bandwidth. Our investigation shows that in a particular optical sensing system, the higher the bandwidth of the optical signal, the better resolution the system will achieve. Experiments based on two types of optical signals (output signal of a tunable laser and a fiber Bragg grating) were carried out, and experimental results verified both the simulation results and the theoretical analysis.
Wu, Q. et al. (2010) Study of the Effect of Source Signal Bandwidth on Ratiometric Wavelength Measurement. Applied Optics, Vol.49, no.29, pp.5626. doi: 10.1364/AO.49.005626