Speaker
Description
The performance of Hong-Ou-Mandel (HOM) based fiber-optic quantum optical gyroscopes relies on the temporal characteristics of the HOM dip. In this work, we derive the analytical relationship between SPDC spectral bandwidth and HOM dip width and validate it with published experimental data. We analyze material dispersion induced broadening of the interference profile under finite coincidence window limit. By considering the coincidence probability and visibility of HOM dip as a function of coincidence window, we analytically derive the optimal operational range of coincidence window that ensures the baseline and width recovery while keeping the loss in visibility within an acceptable limit. The proposed lower bound is $T_B = \sqrt{2} T_{\mathrm{disp,c}} \operatorname{erf}^{-1}(R)$, where $T_{\mathrm{disp,c}}$ is coherence time of dispersed photon and $R$ is the fraction of true coincidence events desired to be recorded; and the upper bound is $T_V = \frac{1-\sqrt{1-\delta}}{1+\sqrt{1-\delta}} \frac{1}{\eta}$, where $\delta$ is the visibility degradation parameter and $\eta$ is the proportionality constant between noise-to-signal ratio and $T$.
Other Fields of Research (Track) for Abstract
Quantum optics and Sensing.
| Nature of work | Theoretical |
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