Logarithmic based optical delay for time-resolved data collection.
A method has been established that generates values spaced according to a mathematical function, specifically the logarithm function that can be applied to a stepper motor. Here, it is applied to yield logarithmically spaced time delay points for subnanosecond interferometric time-resolved experiments using a stepper motor controlled translation stage. Application of this method is discussed in terms of three input parameters: the optical delay stage time resolution, dt; the time of maximum delay, d(stop); and the desired number of data points, N. The method improves the efficiency of interferometric time-resolved data collection while providing data collection effective to determine decay parameters. In principle, this technique could be generalized to any mathematical function.
Cole
Richard L
RL
Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, USA.
Barisas
B George
BG
Levinger
Nancy E
NE