GaAs/GaAlAs RIB waveguide grating filters for λ = 1.5μm

4 June 1987

journal article
Published by Institution of Engineering and Technology (IET) in Electronics Letters

Vol. 23 (12) , 622-624
https://doi.org/10.1049/el:19870446

Abstract

First-order Bragg grating filters have been realised in GaAs/GaAlAs rib waveguides for operation at λ ̃ 1.5μm. Singlemode devices with rib widths of 2 to 5 μm and incorporating a 2.5 mm length of 225 nm period grating have been evaluated using a tunable T1:KCl colour-centre laser. Rejection ratios of 95% to 39% and 3dB bandwidths of 3.5 Å to 7.9 Å have been measured.

Keywords

OPTICAL COMMUNICATION EQUIPMENT
RIB WIDTHS
KCL:TL TUNABLE COLOUR CENTRE LASER
SINGLE MODE DEVICES
III-V SEMICONDUCTORS
GAAS-GAALAS
2 TO 5 MICRON
FIRST-ORDER TYPE
RIB WAVEGUIDE
BRAGG GRATING FILTERS
NANOMETRE GRATING PERIOD
225 NM
1.5 MICRON

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