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

doi:10.1587/transele.E92.C.937

Special Section on Recent Advances in Ultra-high-speed Photonic Devices for Next-generation Optical Fiber Communications

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

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Keywords: electro absorption modulator, EA, DFB laser, uncooled, InGaAlAs, Ethernet, 40Gbps, 100Gbps

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2009 Volume E92.C Issue 7 Pages 937-941

DOI https://doi.org/10.1587/transele.E92.C.937

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Abstract

We have developed a high-speed electroabsorption modulator integrated distributed feedback (EA/DFB) lasers. Transmission performance over 10km was investigated under 25Gbps and 43Gbps 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 12km transmission with over 9.6dB dynamic extinction ratio was demonstrated under 25Gbps modulation. A 43Gbps 10km transmission was also demonstrated. The laser achieved a clear, opened eye diagram with a dynamic extinction ratio over 7dB from 25°C to 85°C. The modulated output power was more than +2.9dBm even at 85°C. These devices are suitable for next-generation, high-speed network systems, such as 40Gbps and 100Gbps Ethernet.

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