Hierarchical self-assembly of Brownian particle-like pulses in a modelocked laser
Passive modelocking involves self-locking of thousands of frequency modes to form ultrashort pulses. In fundamental modelocking, a single intracavity pulse provides high stability and reproducibility, but limits the repetition rate. Harmonic modelocking can overcome this by supporting multiple pulses, but suffers from instabilities and poor reproducibility, with specific states achievable only sporadically. Biology exploits hierarchy to organise complexity, which has inspired hierarchical self-…
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