10-GHz Si bipolar amplifier and mixer ICs for coherent optical systems

• Published in: IEEE journal of solid-state circuits Vol. 27; no. 12; pp. 1775 - 1780
• Main Authors: Okamura, T., Kurioka, C., Kuraishi, Y., Tsuzuki, O., Senba, T., Ushirozawa, M., Fujimaru, M.
• Format: Journal Article
• Language: English
• Published: IEEE 01-12-1992
• Subjects: Bandwidth; Optical amplifiers; Optical interconnections; Optical losses; Power dissipation; Power system interconnection; Power system modeling; Semiconductor optical amplifiers; Silicon; Stimulated emission
• ISSN: 0018-9200; 1558-173X
• DOI: 10.1109/4.173104

Using a 30-GHz f/sub T/ silicon bipolar process, 10-GHz amplifier and mixer ICs for a multigigabit-per-second coherent optical-fiber communication system were fabricated. The dual-feedback amplifier with triple Darlington achieves a 10-GHz bandwidth and 20-dB gain. The Gilbert-cell mixer operates up to 10 GHz with a 10-dB conversion loss. The simulation technique, used for the design of these ICs includes an improved interconnect line model for the high-frequency region. The 10-GHz amplifier has a 1-mm/sup 2/ chip size and 210-mW power dissipation. The mixer has 2-mm/sup 2/ chip size and 550-mW power dissipation.< >