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Pulse compression with time-domain optimized chirped mirrors.

P Dombi, V S Yakovlev, K O'Keeffe

    Optics Express
    |June 9, 2009
    PubMed
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    This study introduces a new method for designing chirped mirrors (CMs) by optimizing their temporal pulse shaping capabilities. This time-domain approach enables the creation of advanced optical coatings for generating ultra-short light pulses.

    Area of Science:

    • Optics and Photonics
    • Materials Science

    Background:

    • Dispersive optical interference coatings, known as chirped mirrors (CMs), are crucial for controlling light pulses.
    • Traditional CM design focuses on frequency-domain properties like reflectance and phase shift.

    Purpose of the Study:

    • To develop a novel target function for CM design based on temporal pulse shaping.
    • To enable the creation of CMs capable of generating sub-5-femtosecond optical pulses.

    Main Methods:

    • Computer optimization of multilayer structures using a novel time-domain target function.
    • Analytical calculation of initial multilayer designs.
    • Experimental demonstration of pulse compression using the designed CMs.

    Main Results:

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    • Successful design of dispersive multilayers with air as the incidence medium.
    • Demonstration of generating optical pulses with durations in the sub-5-femtosecond range.
    • Proof-of-principle compression experiment validated the time-domain optimization approach.

    Conclusions:

    • The proposed time-domain analysis and optimization offer a direct method for designing CMs.
    • This novel approach significantly enhances the capability of CMs in controlling the temporal shape of reflected optical pulses.
    • The method facilitates the generation of unprecedentedly short optical pulses, advancing ultrafast optics research.