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Lena/Sep 2016: Difference between revisions
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ElenaZhivun (talk | contribs) |
ElenaZhivun (talk | contribs) |
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The paper is very poorly written, so it's unclear what exactly happens there and if the method does what they claim. Seems like something relatively easy to try, especially for 100x sensitivity increase o_O.
=== Probe sensitivity degrades when misbalanced ===
We are getting the best probe sensitivity when the balanced polarimeter is perfectly balanced. Sometimes it becomes misbalanced, and the noise floor rises significantly within 0-100 Hz range (where the heartbeat signal is).
Say there is a balanced polarimeter that has two channels - <math>P_x</math> and <math>P_y</math>
<math>
P_x = P(t) \left( \cos \varphi (t) - \cos \varphi (t) \right)
P_y = P(t) \left( \cos \varphi (t) + \cos \varphi (t) \right)
</math>
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