Highly-Efficient, Octave Spanning Soliton Self-Frequency Shift Using a Photonic Crystal Fiber with Low OH Loss

Centre for Ultrahigh-Bandwidth Devices for Optical Systems, Institute of Photonics and Optical Science, School of Physics, The University of Sydney, NSW 2006, Australia.
Optics Express (Impact Factor: 3.49). 08/2011; 19(18):17766-73. DOI: 10.1364/OE.19.017766
Source: PubMed


We report the first demonstration of efficient, octave spanning soliton self-frequency shift. In order to achieve this we used a photonic crystal fiber with reduced OH absorption and widely spaced zero-dispersion wavelengths. To our knowledge, this is the largest reported frequency span for a tunable, fiber-based source. In addition, we observe the generation of light above 2 μm directly from a Ti:Sapphire laser in the form of Cerenkov emission by the soliton when the red-shift saturates at the edge of the anomalous dispersion region.

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    • "Commonly used fibers and their corresponding soliton energies are shown in Fig. 6. Index guided PCFs have large nonlinearity and are typically designed to achieve SSFS at low pulse energies (e.g., small fractions of nanojoules) [35], [37], [38], [59]–[61]. The advantage of index guided PCFs is that the dispersion can be designed to be anomalous below 1270 nm (the zero dispersion wavelength for silica glass, below which dispersion is normal and soliton generation is not supported), which allows for SSFS at red or near IR wavelengths, e.g., using a Ti:S oscillator as the pump. "
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