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Rogue waves are observed in a 980 nm laser diode subject to filtered optical feedback via an FBG. A rogue-wave map is established experimentally as a function of the optical feedback ratio and the laser current.
A highly detailed and extended map of low frequency fluctuations is established for a high power multi-mode 980nm laser diode subject to filtered optical feedback from a fibre Bragg grating. The low frequency fluctuations limits and substructures exhibit substantial differences with previous works.
The splitting of the carbonyl infrared bands of 2-methoxy-1,4-benzoquinone in solution can be related to a mesomeric resonance phenomenon leading to a conformation of the O-CH3 bond coplanar to the quinone ring. The delocalization of the electron density induces a frequency downshift of the C4=O carbonyl compared to 1,4-benzoquinone. This in turns decouples the two carbonyls leading to an upshift...
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