Interference filters using indium phosphide-based epitaxial layers grown by metalorganic vapor phase epitaxy

Abstract
Bandpass interference filters with center wavelengths between 1.3 and 1.7 μm have been made with InGaAsP/InP epitaxial layers grown by metalorganic vapor phase epitaxy. The transmission spectra measured exhibit a full width half maximum of 7 nm with peak rejections up to 20 dB and are in good agreement with the results obtained from theoretical modeling of the 81-layer single half-wave Fabry–Perot structure used. This indicates very good control of the composition and thickness of the layers grown, which is confirmed by transmission electron microscopy of the structure.