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Authors: M. Muneeb, A. Ruocco, A. Malik, S. Pathak, E.M.P. Ryckeboer, D. Sanchez, L. Cerutti, J.B. Rodriguez, E. Tournie, W. Bogaerts, M. Smit, G. Roelkens
Title: Silicon-on-insulator shortwave infrared wavelength meter with integrated photodiodes for on-chip laser monitoring
Format: International Journal
Publication date: 10/2014
Journal/Conference/Book: Optics Express
Editor/Publisher: OSA, 
Volume(Issue): 22(22) p.27300-27308
DOI: 10.1364/oe.22.027300
Citations: 27 ( - last update: 14/7/2024)
23 (OpenCitations - last update: 27/6/2024)
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This paper demonstrates a very compact wavelength meter for on-chip laser tuning in the shortwave infrared wavelength range based on an optimized arrayed waveguide grating (AWG) filter with an integrated photodiode array. The AWG response is designed to obtain large nearest neighbor crosstalk between output channels, which allows measuring the wavelength of a laser under test using the centroid detection technique. The passive AWG is fabricated on a 220 nm silicon-on-insulator (SOI) platform and is combined with GaInAsSb-based photodiodes. The photodiodes are heterogeneously integrated on the output grating couplers of the AWG using DVS-BCB adhesive bonding. The complete device with AWG and detectors has a footprint of only 2 mm2 while the measured accuracy and resolution of the detected wavelength is better than 20pm.

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