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Real-time monitoring of launch vehicle acoustics ensures structural integrity and payload safety during flight. One-third octave analysis, as per ANSI S1.11 class 2 standard, is implemented in an ...
A 3-octave spectral comb is generated in a hydrogen-filled hollow-core photonic-crystal-fiber. The spectrum consists of up to 45 high-order Stokes and anti-Stokes lines generated by coherent ...