Uploaded July 2026 | Updated September 2026, 3 hours ago

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This video demonstrates a step-by-step alignment guide outlined in the Thorlabs Quantum Optics Educational Kit User Guide to align the Michelson interferometer and perform interferometric measurements with single photons.

For more information on the Quantum Optics Educational Kit, visit thorlabs.com/newgrouppage9.cfm?objectgroup_id=15827&ytid=qA5TZ65vSDE.

This video was created in collaboration with Brandon Mitchell from West Chester University and performed by Amelia Klein from University of Pennsylvania.

0:00 Introduction
0:18 Initial Setup
0:44 Stage Mounting and Alignment
2:31 1st Interferometer Arm Setup
3:06 2nd Interferometer Arm Setup
4:44 Interferometer Coarse Alignment
5:57 Interferometer Alignment (Laser)
13:16 Interferometer Alignment (LED)
16:03 Align Interferometer Detector
18:49 Reset System with Filter
17:38 Detector Alignment with Filter
18:54 Detector Alignment with BBO
20:10 Delay Adjustment
20:29 Mount Piezo Controller
21:23 Run Interferometer Experiment