Open AccessIntegrated optical digital‐to‐analogue converter for a 2‐bit BPSK‐modulated signal based on a silicon photonics waveguide
Author(s) -
Aikawa Y.
Publication year - 2020
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2020.0950
Subject(s) - phase shift keying , modulation (music) , photonics , signal (programming language) , electronic engineering , keying , silicon photonics , quadrature amplitude modulation , computer science , physics , optics , telecommunications , engineering , bit error rate , acoustics , channel (broadcasting) , programming language
An integrated optical digital‐to‐analogue (DA) converter, which is intended for a phase‐shift keying (PSK) modulation signal, is presented to realise a fully transparent optical communication system. The converter is provided with a silicon‐based optical waveguide structure in a compact size equal to 1/3000 that of the previous study. The device optically performs a conversion of digital data to their equivalent analogue values by generating a quadrature PSK (QPSK) signal from two binary PSK (BPSK) modulated pulses. In the author's experiment, the resulting QPSK signal is converted into four different intensities depending on the pattern of the 2‐bit BPSK signal at 10 GHz. This fact indicates the experimental demonstration of optical DA conversion for PSK modulation using the integrated device.