Abstract
Conventionally, the beam-propagation method for solving the generalized nonlinear Schrödinger equation, including the slowly varying envelope approximation, has been used to describe the ultrashort-laser-pulse propagation in an optical fiber. However, if the pulse duration approaches the optical cycle regime (<10 fs), this approximation becomes invalid. Then, it becomes necessary to use the finite-difference time-domain (FDTD) method for solving the Maxwell equation with the least approximation. In order to both experimentally and numerically investigate nonlinear femtosecond ultra-broad-band-pulse propagation in a silica fiber, the FDTD calculation of Maxwell's equations has been extended with nonlinear terms to that including all exact Sellmeier-fitting values. The results of this extended FDTD method are compared with experimental results for the nonlinear propagation of a very short (12-fs) chirped laser pulse in a silica fiber. The fiber output pulse compressed to 7 fs by the simulation of group-delay compensation was obtained under the assumption of using a spatial light modulator. To the authors' knowledge, this is the first comparison between FDTD calculation and experimental results for nonlinear propagation of a very short (12-fs) chirped pulse in a silica fiber.
© 2005 IEEE
PDF Article
More Like This
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription