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

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.

Inspec keywords: driver circuits; integrated optoelectronics; modulators; optical transmitters; optical losses; peripheral interfaces; low-power electronics; optical modulation; CMOS integrated circuits; integrated optics

Other keywords: low-temperature-dependence CMOS linear driver; peak detection; electrical bandwidth variation; linear four-channel driver IC; supply voltage variation conditions; serial peripheral interface; CMOS driver; ultra-low power coherent optical transmitters; gain 1.5 dB; temperature monitoring; temperature -5.0 degC to 75.0 degC; gain control; CMOS technology; gain variation; frequency 3.0 GHz; four-channel operation; ultra-low power dissipation; peaking control; low temperature dependence suppression; high-bandwidth coherent driver modulator; power consumption; electro-optic bandwidth

Subjects: Integrated optoelectronics; Integrated optics; Modulators, demodulators, discriminators and mixers; Convertors; CMOS integrated circuits; Optical communication equipment

References

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http://iet.metastore.ingenta.com/content/journals/10.1049/el.2018.6875
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