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In-situ Tapering of Chalcogenide Fiber for Mid-infrared Supercontinuum Generation
Published on: May 27, 2013
Supercontinuum spectrum control in microstructure fibers by initial chirp management.
Rodislav Driben1, Nickolai Zhavoronkov
1Max-Born-Institut for Nonlinear Optics and Short Pulse Spectroscopy, Max-Born-Str 2a, D-12489 Berlin, Germany. radik@eng.tau.ac.il
Optics Express
|August 20, 2010
Summary
Negative chirp in femtosecond pulses enhances supercontinuum generation in photonic crystal fibers. This leads to broader spectra through soliton and dispersive wave interactions.
Area of Science:
- Nonlinear optics
- Fiber optics
- Quantum optics
Background:
- Supercontinuum generation is crucial for various applications.
- Femtosecond laser pulses are used for nonlinear phenomena.
- Photonic crystal fibers offer unique dispersion properties.
Purpose of the Study:
- To investigate the impact of femtosecond pulse chirp on supercontinuum generation.
- To compare the effects of negative and positive chirp.
- To elucidate the underlying physical mechanisms.
Main Methods:
- Experimental investigation of supercontinuum generation.
- Numerical simulations for theoretical verification.
- Analysis of pulse propagation dynamics in photonic crystal fiber.
Main Results:
- Negatively chirped pulses yield broader supercontinua compared to positively chirped pulses.
- Enhanced spectral broadening is attributed to soliton collisions.
- Higher-order dispersion effects contribute to the generation of dispersive waves.
Conclusions:
- Femtosecond pulse chirp significantly influences supercontinuum generation.
- Negative chirp offers advantages for achieving wider spectral coverage.
- The interplay between solitons and dispersive waves is key to broadband generation.
