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Published on: March 20, 2017
Nonlinear femtosecond pulse reshaping in waveguide arrays.
Darren D Hudson1, Kimberlee Shish, Thomas R Schibli
1JILA, National Institute of Standards and Technology and University of Colorado, Boulder, Colorado 80309-0440, USA.
Optics Letters
|July 3, 2008
Summary
Nonlinear pulse reshaping was observed in femtosecond pulses within a waveguide array due to waveguide coupling. This phenomenon, consistent with theoretical predictions, resulted in pulse shortening, particularly in the central waveguide.
Area of Science:
- Nonlinear optics
- Waveguide optics
- Semiconductor materials
Background:
- Waveguide arrays enable light manipulation through coupled modes.
- Nonlinear optical effects can significantly alter pulse characteristics.
Purpose of the Study:
- To investigate nonlinear pulse reshaping in a waveguide array.
- To experimentally verify theoretical predictions of pulse dynamics.
Main Methods:
- Coupling amplified femtosecond pulses from a mode-locked fiber laser.
- Utilizing an Aluminum Gallium Arsenide (AlGaAs) core waveguide array structure.
- Observing power-dependent pulse reshaping characteristics.
Main Results:
- Demonstrated nonlinear pulse reshaping of femtosecond pulses.
- Observed significant pulse shortening in the central waveguide.
- Experimental results showed strong agreement with theoretical models.
Conclusions:
- Waveguide coupling in AlGaAs arrays facilitates nonlinear pulse reshaping.
- Pulse shortening is a key characteristic of this nonlinear phenomenon.
- The study validates theoretical frameworks for light propagation in nonlinear waveguide arrays.
