Performance Evaluation Based on Numerical Simulation of Novel Guided Spontaneous Emission Circuit for Improved Optical Power Resolution

We perform a numerical simulation to evaluate the performance of a guided spontaneous emission circuit aimed to significantly improve the optical power resolution (OPR). Experimental results suitably agree with numerical simulation results. The maximum slope, which is an improvement factor of the OPR, for forward and backward pumping are 9.5 and 4.4, respectively, at output wavelength of 1533 nm according to the experimental results. The maximum slope of forward pumping is more than twice the maximum slope value of backward pumping. In addition, a numerical simulation of the mode field diameter (MFD) dependence reveals that the maximum slope increases with increasing MFD and the largest maximum slope is 12.6 at the wavelength of 1533 nm.