Abstract
We report a new fiber concept, which is a hybrid design between classical step-index and photonic crystal fibers (PFCs). The proposed structure has a centrally located Ge doped core surrounded by a set of smaller microinclusions distributed in the cladding. In numerical investigations, we demonstrate that such a combination allows to arbitrarily shape the dispersion profile in a 1 μm wide spectral range while reducing the confinement losses with respect to air-hole PCFs exhibiting similar dispersion characteristics. We present simple guidelines for optimizing the structure. Finally, as a proof of concept, we show an adequately designed fiber which, even though is based on fused silica glasses and is an all-solid construction, is still capable of providing flat and all-normal dispersion characteristics (−37 ± 2.5 ps/nm/km) in broadband range from 1.3–2.15 μm and ultra-flat (−37 ± 0.2 ps/nm/km) for wavelength values from 1.5–1.9 μm.
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