Uploaded June 2026 | Updated September 2026, 2 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 polarization optics and perform the Quantum Eraser experiment.

For more information on the Quantum Optics Educational Kit, visit thorlabs.com/newgrouppage9.cfm?objectgroup_id=15827&ytid=Y91hQo0LzmQ.

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

0:00 Introduction
0:23 Calibrate 1" Polarizer
1:23 Calibrate 1/2" Polarizers
3:28 Calibrate Half Waveplate
4:26 Waveplate Alignment
5:26 1st 1/2" Polarizer Alignment
6:15 2nd 1/2" Polarizer Alignment
6:56 Interferometer Alignment (Laser)
8:26 Interferometer Alignment (LED)
10:43 Reset System
11:29 Parallel Polarizers, No Eraser
12:43 Crossed Polarizers, No Eraser
13:57 Add Quantum Eraser Polarizer
14:18 Crossed Polarizers with Eraser