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Updated: May 25, 2026
Quasi-light Storage for Optical Data Packets
Published on: February 6, 2014
1.3-μm, 4 × 25-Gbit/s, EADFB laser array module with large-output-power and low-driving-voltage for energy-efficient
Takeshi Fujisawa1, Shigeru Kanazawa, Kiyoto Takahata
1NTT Photonics Laboratories, NTT Corporation, Morinosato Wakamiya, 3-1, Atsugi, Kanagawa, 243-0198, Japan. fujisawa.takeshi@lab.ntt.co.jp
Abstract:
A 1.3-μm, 4 × 25-Gbit/s, EADFB laser array module with large output power and low driving voltage is developed for 100GbE. A novel rear grating DFB laser is introduced to increase the output power of the laser while keeping the single mode lasing, which is desirable for a monolithic integration. Also, InGaAlAs-based electroabsorption modulators make very-low-driving-voltage operation possible due to their steep extinction curves. With the module, very clear 25-Gbit/s eye openings are obtained for four wavelengths with the driving voltage of only 0.5 V while securing the dynamic extinction ratio required by the system. These results indicate that the presented module is a promising candidate for energy-efficient future 100GbE transmitter.
