Beam spot size evolution of Gaussian femtosecond pulses after angular dispersion

Beam spot size evolution of spatially Gaussian femtosecond laser pulses after angular dispersion is analyzed and verified with experiments. A general analytical expression for beam spot size at arbitrary propagation distances is obtained, which indicates that beam spot size evolution after angular d...

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Bibliographic Details
Published in:Optics letters 2008-01, Vol.33 (2), p.128-130
Main Authors: LI, Derong, LV, Xiaohua, SHAOQUN ZENG, QINGMING LUO
Format: Article
Language:English
Subjects:
Beam characteristics: profile, intensity, and power
spatial pattern formation
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Laser optical systems: design and operation
Nonlinear optics
Optics
Physics
Ultrafast processes
optical pulse generation and pulse compression
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Summary:Beam spot size evolution of spatially Gaussian femtosecond laser pulses after angular dispersion is analyzed and verified with experiments. A general analytical expression for beam spot size at arbitrary propagation distances is obtained, which indicates that beam spot size evolution after angular dispersion is determined by the direct interaction of spectral lateral walk-off by angular dispersion and the intrinsic divergence of the Gaussian beam. This work reveals insights into the propagation of Gaussian femtosecond laser pulses and beams after angular dispersion and may be important for the generation and application of femtosecond laser pulses.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.33.000128