Open AccessDesign of a coarse WDM bandpass filter using the Thelen bandpass design method
Author(s) -
Philip Baumeister
Publication year - 2001
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.9.000652
Subject(s) - band pass filter , passband , chebyshev filter , optics , bandwidth (computing) , transmittance , wavelength division multiplexing , optical filter , materials science , optoelectronics , computer science , physics , telecommunications , wavelength , computer vision
A starting design for a prototype bandpass is modeled as a periodic structure, following the teachings of Thelen. A sample prototype bandpass contains twenty-one cavities and, after computer optimization, manifests a quasi-Chebyshev transmissive response in its passband. When the prototype is converted to a thin film multilayer bandpass, its spectral bandwidth is 12.70 nm at the -0.5 dB transmittance level and 12.99 nm at the -25 dB level.