Spectral Width Study in a Wavelength Detector

In this paper, we describe different use configurations of a wavelength detector and the main parameters of an optical bistable sensor. Mainly we analyze by simulation tools the influence of the spectral width of each signal involved in our wavelength detector, namely the LDD -Laser Diode Detector-. In particular, we study the spectral width effect of the signal to be detected. The LDD, based on the bistable behavior of semiconductor lasers, has an internal continuous wave laser that allows the calibration of the sensor. Also, the effect of the line width is analyzed for this CW laser. It is shown that, for the different types of signals, the detector achieves accuracy near to 0.001nm, working with typical manufacture parameters values of the laser diodes and with wavelengths centered in the optical communications C-band.