New nanosecond continuum for excited-state spectroscopy

A new nanosecond broad‐band continuum source is described. The continuum is generated by nonlinear optical processes in fiber waveguides pumped with a 20‐kW 10‐ns dye‐laser pulse of broad spectral width (∼150 A). The continuum has a bandwidth of several thousand cm−1 in the visible with a total power ∼1 kW. The new continuum is in many aspects superior to previously known continuum sources for nanosecond time‐resolved excited‐state spectroscopy.

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