Biomolecules and nanostructures
The Optical Sciences group studies the interaction of light and matter. Our current focus is on detection and sensing/imaging with an emphasis on the development of integrated photonics. We are part of Twente University's Department of Science and Technology and member of the MESA+ institute.
Robust orthogonal parameterization of evolution strategy for adaptive laser pulse shaping(full pdf)
Aliakbar Jafarpour, Janne Savolainen, Rianne de Jong, Jacob Middag, Daan P. Sprünken, Peter van der Walle, Di Yang, and Jennifer L. Herek
Vol. 17, No. 14 p11986-12000 july 1, 2009
Many spectroscopic applications of femtosecond laser pulses
require properly-shaped spectral phase profiles. The optimal phase profile
can be programmed on the pulse by adaptive pulse shaping. A promising
optimization algorithm for such adaptive experiments is evolution strategy
(ES). Here, we report a four fold increase in the rate of convergence and ten
percent increase in the final yield of the optimization, compared to the direct
parameterization approach, by using a new version of ES in combination
with Legendre polynomials and frequency-resolved detection. Such a fast
learning rate is of paramount importance in spectroscopy for reducing the
artifacts of laser drift, optical degradation, and precipitation.
©2009 Optical Society of America