Low-temperature-dependence CMOS linear driver with serial peripheral interface for 64-Gbaud ultra-low power coherent optical transmitters

• Published in: Electronics letters Vol. 54; no. 25; pp. 1448 - 1450
• Main Authors: Ozaki, J, Nakano, S, Jyo, T, Nagatani, M, Ogiso, Y, Kanazawa, S, Nosaka, H, Kikuchi, N
• Format: Journal Article
• Language: English
• Published: The Institution of Engineering and Technology 13.12.2018
• Subjects: CMOS driver; CMOS integrated circuits; CMOS technology; driver circuits; electrical bandwidth variation; electro‐optic bandwidth; four‐channel operation; frequency 3.0 GHz; gain 1.5 dB; gain control; gain variation; high‐bandwidth coherent driver modulator; integrated optics; integrated optoelectronics; linear four‐channel driver IC; low temperature dependence suppression; low‐power electronics; low‐temperature‐dependence CMOS linear driver; modulators; Optical communication; optical losses; optical modulation; optical transmitters; peak detection; peaking control; peripheral interfaces; power consumption; serial peripheral interface; supply voltage variation conditions; temperature monitoring; temperature ‐5.0 degC to 75.0 degC; ultra‐low power coherent optical transmitters; ultra‐low power dissipation; four-channel operation; high-bandwidth coherent driver modulator; peaking control; frequency 3.0 GHz; integrated optoelectronics; serial peripheral interface; optical transmitters; ultra-low power coherent optical transmitters; temperature -5.0 degC to 75.0 degC; power consumption; CMOS driver; supply voltage variation conditions; low temperature dependence suppression; CMOS integrated circuits; modulators; linear four-channel driver IC; electro-optic bandwidth; temperature monitoring; driver circuits; optical modulation; ultra-low power dissipation; peak detection; peripheral interfaces; gain 1.5 dB; CMOS technology; gain control; optical losses; integrated optics; gain variation; low-power electronics; electrical bandwidth variation; low-temperature-dependence CMOS linear driver
• ISSN: 0013-5194; 1350-911X; 1350-911X
• DOI: 10.1049/el.2018.6875

The authors used 65-nm CMOS technology to develop a linear four-channel driver IC with low temperature dependence and ultra-low power dissipation for 64-Gbaud coherent optical transmitters. The driver showed more than a 48-GHz 3-dB electrical bandwidth and less than 1-W power consumption in four-channel operation. By employing a circuit that suppresses the temperature dependence, they achieved 3-dB electrical bandwidth variation of 3.0 GHz and the gain variation of 1.5 dB under the −5 to 75°C and ±5% supply voltage variation conditions. The CMOS driver has all the necessary functions for a high-bandwidth coherent driver modulator such as a gain control, peaking control, peak detection and temperature monitoring, all of which functions can be controlled by a serial peripheral interface. A fabricated sub-assembly consisting of the CMOS driver and an InP modulator showed a 48-GHz 3-dB electro-optic bandwidth.