Uploaded June 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 pump laser, alignment laser, and three detectors to perform the Grangier-Roger-Aspect (GRA) experiment.

For more information on the Quantum Optics Educational Kit, visit thorlabs.com/newgrouppage9.cfm?objectgroup_id=15827&ytid=Rd7vwXMygrg.

0:00 Introduction
0:31 Alignment Laser Adjustment
1:15 Alignment Laser Setup
2:28 Two Iris Setup
2:52 Beam Walk Alignment Laser
4:44 Beam Walk Pump Laser
6:26 Axicon Setup
7:46 Alignment Target Setup
8:24 Detector T Alignment
9:25 Detector A Alignment
10:34 Electrical Cable Connections
10:54 Install Detector Optics
12:02 Detector Alignment with Filter
14:36 BBO Crystal Alignment
16:14 Delay Adjustment
17:21 Beamsplitter Alignment
18:12 Detector B Alignment
20:18 Detector Alignment with Filter
21:45 Detector Alignment with BBO
22:36 Delay Adjustment
23:50 GRA Experiment