Time-domain approach for designing dispersive mirrors based on the needle optimization technique. Theory.

Research Computing Center, Moscow State University, Leninskie Gory, 119992 Moscow, Russia.
Optics Express (Impact Factor: 3.53). 01/2009; 16(25):20637-47. DOI: 10.1364/OE.16.020637
Source: PubMed

ABSTRACT We combine powerful and well-proven needle-optimization technique with time-domain optimization approach in order to obtain a new efficient method of designing dispersive mirrors. We also propose a new optimization criterion targeted at reaching shortest possible pulses with maximum possible energy at the exit of a compressor containing such mirrors. Proposed optimization criterion includes two parameters allowing one to adjust the relative weights of the mentioned targets with a high flexibility. The obtained results are compared with solutions of the "classical" optimization approach based on the optimization of a merit function comparing theoretical reflectance and group delay dispersion with target ones. The new approach allows obtaining simpler solutions providing better characteristics of the output pulse.

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