http://pc5271.org/PC5271_AY2324S2/index.php?action=history&feed=atom&title=Position_SensorPosition Sensor - Revision history2026-10-20T02:42:24ZRevision history for this page on the wikiMediaWiki 1.43.8http://pc5271.org/PC5271_AY2324S2/index.php?title=Position_Sensor&diff=87&oldid=prevAngela: /*Abstract*/2024-02-22T02:57:03Z<p><span class="autocomment">Abstract</span></p>
<p><b>New page</b></p><div>== Abstract ==<br />
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Using PDH technique to sense the vibration and the movement of the mirror driven by the noise from the environment (acoustic, thermal, etc.)<br />
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PDH is commonly used in locking to provide a means to control and decrease the laser’s linewidth, and further to stabilize the mode of the laser light. Alternatively, if a stable laser is available, the PDH technique can be used to stabilize and/or measure the instabilities in an optical cavity length.<br />
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In this proposal, we will lock the cavity by reading the error signal of reflection/transmission of the cavity and then feed it back to the input mirror, moving the mirror with a PZT. And then we can read out the cavity length change from the error signal. This sensing technique is commonly using in LVK (LIGO-Virgo-KAGRA) interferometric gravitational wave detection community, as well as quantum optomechnics.</div>Angela