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Title: Fabrication-tolerant integrated polarisation splitter based on cascaded Mach–Zehnder interferometers

We report a fabrication-tolerant polarisation splitter based on cascaded Mach – Zehnder interferometers. This configuration enables a factor of 2 – 3 increase (at the 20 dB level) in the tolerance to the phase difference in comparison with a single interferometer. As an example, we present numerical simulation of a splitter with a centre wavelength of 650 nm, based on a planar waveguide from Si{sub 3}N{sub 4}. The permissible channel waveguide width deviation from calculation results (20-dB extinction coefficient bandwidth) is ∼8% (∼30 nm) for the TE polarisation and ∼30% (100 nm) for the TM polarisation. (fiber and integrated optics)
Authors:
;  [1]
  1. Moscow Institute of Physics and Technology (State University), Dolgoprudnyi, Moscow Region (Russian Federation)
Publication Date:
OSTI Identifier:
22373655
Resource Type:
Journal Article
Resource Relation:
Journal Name: Quantum Electronics (Woodbury, N.Y.); Journal Volume: 43; Journal Issue: 12; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; COMPARATIVE EVALUATIONS; COMPUTERIZED SIMULATION; MACH-ZEHNDER INTERFEROMETER; POLARIZATION; SILICON NITRIDES; WAVEGUIDES