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http://dx.doi.org/10.3807/COPP.2021.5.6.711

Phase Control Optimization at Waveguide Crossover and Its Application to 45° Optical Hybrid for Demodulating 8DPSK Optical Signals

Jeong, Seok-Hwan (Department of Electronic Materials Engineering, The University of Suwon)

Publication Information

Current Optics and Photonics / v.5, no.6, 2021 , pp. 711-720 More about this Journal

Abstract

A novel optical hybrid device that doubles the multilevel demodulation resolution by adding the optical interferometer with a waveguide crossover is proposed, theoretically analyzed and experimentally verified. We report two types of all-passive phase control schemes that will be referred to as a phase compensation scheme and a phase optimization scheme. We also apply the proposed phase control schemes to a 45° optical hybrid consisting of two parallel 90° optical hybrids together with the proposed phase control scheme for demodulating 8-level differential phase shift keying optical signals. Octagonal phase response with low wavelength sensitive excess loss of <0.8 dB over 31-nm-wide spectral range will be demonstrated in the InP-based material platform.

Keywords

Integrated optics; Optical waveguide; Phase demodulator;

Citations & Related Records

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