title: Analysis of distributed-feedback lasers with fractionally organized gratings.
abstract: We analyze the performance of distributed-feedback lasers with special grating structures. These grating structures consist of subgratings with different lengths (that are integer multiples of a reference length) and/or different phase shifts (that are also integer multiples of a reference phase shift). These grating structures can provide transmission peaks with high quality factors, which may be useful for distributed-feedback lasers. To assess the usefulness of these devices, threshold and steady-state analysis are performed for a few selected examples. A given design example is shown to provide a low threshold without major variations in photon density along the device.
authors.affiliation: Electronic Materials Engineering, Research School of Physical Sciences and Engineering, Australian National University, ACT Canberra, Australia. Haroldohattori@hotmail.com
authors.forename: Haroldo T
authors.initials: HT
authors.lastname: Hattori
authors.forename: Vitor M
authors.initials: VM
authors.lastname: Schneider
authors.forename: Carmem Lúcia
authors.initials: CL
authors.lastname: Barbosa