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A chirp-compensation technique using incident-angle changes of cavity mirrors in a femtosecond pulse laser

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3 Author(s)
Yamashita, Mikio ; Electrotechnical Laboratory, Tokyo, Japan ; Torizuka, K. ; Sato, T.

A technique for chirp-compensation in a CPM laser is presented. By using the change of the incident angle to multilayer dielectric cavity mirrors, the intracavity second-order dispersionphi''(omega)is adjusted without any additional elements. It is confirmed that the optimum value ofphi''(omega) = +2.1 times 10^{-28}s2obtained when up-chirp was compensated and pulses as short as 55 fs were generated is reasonable, by comparison to analytic results of chirp behaviors. In addition, the effect of the third-order dispersionphi'''(omega)at the optimum value ofphi''(omega)on pulses is evaluated.

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Quantum Electronics, IEEE Journal of  (Volume:23 ,  Issue: 11 )