http://arxiv.org/abs/2002.04864
Accurate readout of low-power optical higher-order spatial modes is of increasing importance to the precision metrology community. Such devices may prevent mode mismatches from degrading quantum and thermal noise mitigation strategies. Direct mode analysis sensors are a promising technology for real time monitoring of arbitrary higher-order modes. We demonstrate this technology with photo-diode readout to mitigate the typically low dynamic range of CCDs. We experimentally demonstrate the effect of a relative misalignment between the phase-plate and the photo-diode on the readout of higher-order modes, then derive this response. We then compute the residual the effects of the finite photo-diode aperture on the dynamic range and discuss implementation considerations for future sensors.
A. Jones, M. Wang, C. Mow-Lowry, et. al.
Thu, 13 Feb 20
22/54
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