Propagation dependence of chirp in Gaussian pulses and beams due to angular dispersion

The chirp acquired by a Gaussian ultrashort pulse due to angular dispersion, unlike that of plane waves, increases nonlinearly with propagation distance and eventually asymptotes to a constant. However, this interesting result has never been directly measured. In this Letter, we use two-dimensional...

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Bibliographic Details
Published in:Optics letters 2009-04, Vol.34 (7), p.962-964
Main Authors: DERONG LI, SHAOQUN ZENG, QINGMING LUO, BOWLAN, Pamela, CHAUHAN, Vikrant, TREBINO, Rick
Format: Article
Language:English
Subjects:
Computer Simulation
Diffraction and scattering
Electronic Data Processing
Equipment Design
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Image Processing, Computer-Assisted
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Interferometers
Interferometry - instrumentation
Interferometry - methods
Models, Statistical
Models, Theoretical
Nonlinear optics
Normal Distribution
Optical instruments, equipment and techniques
Optics
Optics and Photonics
Oscillometry - instrumentation
Oscillometry - methods
Physics
Reproducibility of Results
Signal Processing, Computer-Assisted
Ultrafast processes
optical pulse generation and pulse compression
Wave optics
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Summary:The chirp acquired by a Gaussian ultrashort pulse due to angular dispersion, unlike that of plane waves, increases nonlinearly with propagation distance and eventually asymptotes to a constant. However, this interesting result has never been directly measured. In this Letter, we use two-dimensional spectral interferometry to measure the propagation dependence of the chirp for Gaussian ultrashort pulses and beams with angular dispersion. The measured chirp as a function of propagation distance agreed well with theory. This work verifies both an equation and a measurement technique that will be useful for predicting or determining the pulse's chirp in ultrafast optics experiments that contain angular dispersion.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.34.000962