Fujisawa Takeshi, Kanazawa Shigeru, Takahata Kiyoto, Kobayashi Wataru, Tadokoro Takashi, Ishii Hiroyuki, Kano Fumiyoshi
NTT Photonics Laboratories, NTT Corporation, Morinosato Wakamiya, 3-1, Atsugi, Kanagawa, 243-0198, Japan.
Opt Express. 2012 Jan 2;20(1):614-20. doi: 10.1364/OE.20.000614.
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.
为100GbE开发了一种1.3μm、4×25Gbit/s、具有大输出功率和低驱动电压的电吸收分布反馈（EADFB）激光阵列模块。引入了一种新型后光栅分布反馈（DFB）激光器，以在保持单模激射的同时提高激光器的输出功率，这对于单片集成是理想的。此外，基于InGaAlAs的电吸收调制器因其陡峭的消光曲线而使极低驱动电压操作成为可能。使用该模块，在仅0.5V的驱动电压下，四个波长均获得了非常清晰的25Gbit/s眼图开口，同时确保了系统所需的动态消光比。这些结果表明，所展示的模块是未来节能100GbE发射器的一个有前途的候选者。
