Up to 80 Gbaud DP-16QAM operation using InP-based high-bandwidth coherent driver modulator

• Published in: Electronics letters Vol. 55; no. 17; pp. 951 - 953
• Main Authors: Ozaki, J, Ogiso, Y, Hashizume, Y, Kanazawa, S, Ueda, Y, Nunoya, N, Tanobe, H, Ishikawa, M
• Format: Journal Article
• Language: English
• Published: The Institution of Engineering and Technology 22.08.2019
• Subjects: baud rate operation; bit error rate performance; coplanar waveguides; differential capacitively loaded travelling‐wave RF electrode; double ultralow loop wires; DP‐16QAM operation; driver circuits; driver IC; electro‐optic bandwidth; electro‐optical modulation; error statistics; ground‐signal–signal‐ground configuration; high‐bandwidth coherent driver modulator configuration; indium compounds; InP; InP‐based high‐bandwidth coherent driver modulator; optical communication equipment; optical planar waveguides; Photonics; quadrature amplitude modulation; signal integrity; straight coupled coplanar waveguide; electro-optic bandwidth; InP-based high-bandwidth coherent driver modulator; high-bandwidth coherent driver modulator configuration; indium compounds; driver circuits; quadrature amplitude modulation; InP; differential capacitively loaded travelling-wave RF electrode; optical planar waveguides; straight coupled coplanar waveguide; baud rate operation; double ultralow loop wires; signal integrity; ground-signal–signal-ground configuration; bit error rate performance; electro-optical modulation; coplanar waveguides; optical communication equipment; DP-16QAM operation; driver IC; error statistics
• ISSN: 0013-5194; 1350-911X; 1350-911X
• DOI: 10.1049/el.2019.1439

The authors obtained very good back-to-back bit error rate performance in up to 80 Gbaud DP-16QAM operation by using their coherent driver modulator of a 3-dB electro-optic bandwidth of over 50 GHz. To achieve high bandwidth and good signal integrity, they used double ultra-low loop wires between the driver IC and the modulator and a differential capacitively loaded travelling-wave RF electrode based on straight coupled coplanar waveguide with a ground-signal–signal-ground configuration for their InP modulator. As far as they know, this is the highest bandwidth and baud rate operation so far for the high-bandwidth coherent driver modulator configuration.