We propose a simple and yet effective compensation technique to address the potential back-reflected signal coming from the output port of the minimalist-designed, linear optical field frequency discriminator (FD) having a unique folded-back arrangement. Specifically, we consider the engineering problems associated with the combined effects of (i) back reflection signal coming from the output port of the Y-junction divider, and (ii) non-optimized coupling condition of the Y-junction power divider. Our proposed compensation technique solves these problems by using a reflector (or mirror) with variable reflectance positioned at one of the outputs of the single Mach-Zehnder interferometer (MZI) device. By tuning the value of the mirror reflectance to an optimal value, we can compensate for the effects of these above-mentioned problems.
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