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Reflectivity spectra evolution in grating structures with fractionally organized gaps
Author(s) -
Hattori Haroldo T.,
Schneider Vitor M.,
Barbosa Carmen L.,
Cazo Rogério M.
Publication year - 2001
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.1077
Subject(s) - wavelength , grating , optics , spectral line , microwave , scaling , materials science , reflectivity , optoelectronics , physics , mathematics , geometry , quantum mechanics , astronomy
Gratings with quarter‐wavelength gaps separating subgratings have been analyzed extensively in the literature, where they have found applications for distributed feedback lasers, filters, etc. In these structures, the gaps always had quarter‐wavelength lengths. We modify these structures by starting with a quarter‐wavelength gap, but ordering the subsequent gaps following a scaling factor of 0.8. The subgratings are assumed to be uniform and to have equal lengths. The reflectivity spectra of these gratings are analyzed by using the transfer matrix method, with emphasis on the wavelength range near the central lobe. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 29: 42–45, 2001.