Low-kappa DBR grating filters on an InP generic photonic integration foundry platform

Rakesh Ranjan Kumar, Andreas Hänsel, Pau Castera, Nicolas Volet, Martijn J.R. Heck

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review


We demonstrate narrow-bandwidth, low-kappa, distributed Bragg reflector (DBR) grating filters on an indium phosphide (InP) generic foundry platform. With the varying corrugation widths of the DBR grating, we achieve flexibility in the design of the coupling coefficients from 10 to 50 cm−1, which correspond to grating bandwidths of 0.68 nm to 1.28 nm, respectively. These values are experimentally observed and agree well with the theoretical analysis. The DBR grating is based on periodic rectangular grooves in quaternary material that is placed between the waveguide core and cladding region. Such configurations of the DBR grating provide a low propagation loss of ∼2 dB/cm near the telecom band around 1550 nm.

Original languageEnglish
JournalJournal of the Optical Society of America B: Optical Physics
Pages (from-to)1054-1059
Number of pages6
Publication statusPublished - Apr 2024


Dive into the research topics of 'Low-kappa DBR grating filters on an InP generic photonic integration foundry platform'. Together they form a unique fingerprint.

Cite this