We report on the ultrashort pulse inscription of chirped fiber Bragg gratings (FBG) using a constant phase mask and a
deformed wave front. To analyze the influence of wave front deformations on the grating period, a numerical model was
developed. It is based on a ray optical solution of the diffraction of an arbitrary wave front at a phase mask with a
constant period, where the wave front is described by Zernike polynomials. Generally, a plane wave front generates an
interference pattern with half the phase mask period. A defocus changes the grating period, while higher order
aberrations like coma or spherical aberration yield a chirp along the inscribed grating. Additionally, the grating period
depends on the distance of phase mask and fiber. To experimentally deform the wave front of the inscription beam, a
cylindrical tuning lens was introduced to the setup. Due to decentering and tilting of the tuning lens, higher order
aberrations were generated. Furthermore the fiber was tilted with respect to the phase mask. A chirped FBG with a
FWHM bandwidth of 6.2 nm was realized.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.