1.3- \mu m 4 \,\times\, 25-Gb/s Monolithically Integrated Light Source for Metro Area 100-Gb/s Ethernet

• Published in: IEEE photonics technology letters Vol. 23; no. 6; pp. 356 - 358
• Main Authors: Fujisawa, T, Kanazawa, S, Ishii, H, Nunoya, N, Kawaguchi, Y, Ohki, A, Fujiwara, N, Takahata, K, Iga, R, Kano, F, Oohashi, H
• Format: Journal Article
• Language: English
• Published: IEEE 15-03-2011
• Subjects: 100-Gb/s Ethernet; Distributed feedback devices; Electroabsorption modulator integrated with distributed-feedback (DFB) laser; Fiber optics; Laser modes; Light sources; Modulation; monolithic integration; Optical waveguides; Waveguide lasers
• ISSN: 1041-1135; 1941-0174
• DOI: 10.1109/LPT.2011.2106117

A 1.3- monolithically integrated light source for metro area 100-Gb/s Ethernet is developed. Four 25-Gb/s electroabsorption modulators integrated with distributed-feedback lasers and their multiplexer are monolithically integrated on one chip. A shallow ridge waveguide is used for lasers and modulators for large modulation bandwidth, and a deep ridge waveguide is used for the multiplexer region due to its low bending and radiation losses. The integration of hetero-waveguide devices enables the very small chip size of 22.6 . With the device, 100-Gb/s (4 25-Gb/s simultaneous) operation is demonstrated with the clear eye-openings, and error-free 40-km single-mode fiber transmission is achieved for the first time.