Construction of Double Cladding Small Dispersion Photonic Crystal Fiber to Guide Ultrashort Pulse at 800 nm
H. Stawska and E. Bereś-Pawlik
Radiocommunication and Teleinformatics Department, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland
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The methods using femtosecond lasers are very popular in the world recently. They are used for different research methods. We begin to use a multi-photon autofluorescence method for cancer tissue detection. We plan to use this method with special photonic crystal fiber optic sensors. We would like to use to this detection femtosecond oscillator for 800 nm region. However, according to our information there is no fiber which can provide these femtosecond signals at 800 nm region without dispersion and nonlinear effect. Applying typical fiber causes dispersion of guided signals. Therefore we are preparing suitably designed fibers. Double-clad photonic fibers can play a dual role of ultrashort pulse delivery and efficient collection of nonlinear optical signals. In the paper a new design of double cladding small dispersion photonic crystal fiber is proposed. Simulations of both structure and dispersion in proposed fibers are presented.
DOI: 10.12693/APhysPolA.122.896
PACS numbers: 42.81.-i, 42.81.Pa, 42.62.Be, 42.65.Re, 87.64.-t, 87.64.kv, 87.64.mn