High-Speed EA-DFB Laser for 40-G and 100-Gbps

Shigeki MAKINO  Kazunori SHINODA  Takeshi KITATANI  Hiroaki HAYASHI  Takashi SHIOTA  Shigehisa TANAKA  Masahiro AOKI  Noriko SASADA  Kazuhiko NAOE 

Publication
IEICE TRANSACTIONS on Electronics  Vol.E92-C  No.7  pp.937-941
Publication Date: 2009/07/01
Online ISSN: 1745-1353
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Recent Advances in Ultra-high-speed Photonic Devices for Next-generation Optical Fiber Communications)
Category: INVITED
Keyword: 
electro absorption modulator,  EA,  DFB laser,  uncooled,  InGaAlAs,  Ethernet,  40 Gbps,  100 Gbps, 

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Summary: 
We have developed a high-speed electroabsorption modulator integrated distributed feedback (EA/DFB) lasers. Transmission performance over 10 km was investigated under 25 Gbps and 43 Gbps modulation. In addition, the feasibility of wide temperature range operation was also investigated. An uncooled EA/DFB laser can contribute to the realization of low-power-consumption, small-footprint and cost-effective transceiver module. In this study, we used the temperature-tolerant InGaAlAs materials in an EA modulator. A wide temperature ranged 12 km transmission with over 9.6 dB dynamic extinction ratio was demonstrated under 25 Gbps modulation. A 43 Gbps 10 km transmission was also demonstrated. The laser achieved a clear, opened eye diagram with a dynamic extinction ratio over 7 dB from 25 to 85. The modulated output power was more than +2.9 dBm even at 85. These devices are suitable for next-generation, high-speed network systems, such as 40 Gbps and 100 Gbps Ethernet.