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Abstract
The temporal dispersion effect and compensation approach of femtosecond laser scanning by an acousto-optical deflector (AOD) was studied. The group delay dispersion (GDD) of a single AOD at 800nm wavelength is about 9300fs2. Based on the principle of angular dispersion of AOD and the prism, an approach that uses single prism pre-compensating an AOD for the temporal dispersion was designed and demonstrated by experiments. At center frequency (70MHz) of the AOD, a 398fs pulse is compressed to 122fs, the range of pulse width on the entire bandwidth (50MHz—90MHz) is 120fs—180fs. This approach is demonstrated to be effective on compensation of temporal dispersion for AOD scanning femtosecond laser.

Keywords:
femtosecond laser/

acousto-optical deflector/

temporal dispersion/

pulse compression
Authors and contacts
Li De-Rong¹,

Lü Xiao-Hua¹,

Wu Ping¹,

Luo Qing-Ming¹,

Chen R. Wei³,

Zeng Shao-Qun²
References

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Vol. 55, Issue 9 - 2006-05-05

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