Uploaded January 2023 | Updated September 2026, 2 weeks ago

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Mode locking explained:
en.wikipedia.org/wiki/Mode_locking
youtube.com/watch?v=I0_qSL8l6YE

Another demonstration of mode locking:
youtube.com/watch?v=a8S26iExR7A

Optical Frequency Combs:
en.wikipedia.org/wiki/Frequency_comb
nist.gov/video/expanding-microring-resonator-frequency-comb
tf.nist.gov/general/pdf/2497.pdf