Long-Reach 100 Gbit Ethernet Light Source Based on 425-Gbit/s 1.3-µm InGaAlAs EADFB Lasers

Takeshi FUJISAWA  Kiyoto TAKAHATA  Takashi TADOKORO  Wataru KOBAYASHI  Akira OHKI  Naoki FUJIWARA  Shigeru KANAZAWA  Takayuki YAMANAKA  Fumiyoshi KANO  

IEICE TRANSACTIONS on Electronics   Vol.E94-C   No.7   pp.1167-1172
Publication Date: 2011/07/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E94.C.1167
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Joint Special Section on Opto-electronics and Communications for Future Optical Network)
100 Gbit Ethernet,  electroabsorption modulator,  transmitter optical subassembly,  can-type package,  

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High-performance 1.3-µm electroabsorption modulators integrated with DFB lasers are developed for long-reach 100 Gbit Ethernet. The dynamic extinction ratio of over 8-dB with the voltage swing of 2 V are achieved for the four LAN-WDM lanes (14 nm wavelength range) used in 100 Gbit Ethernet with the same modulator structure. The fabricated devices are packaged in butterfly modules and four-lane 40-km single mode fiber transmission at 25-Gbit/s operation is demonstrated. Further, a can-type transmitter optical subassembly is fabricated to reduce the cost and size of transmitter modules. The use of a low-dielectric-constant liquid crystal polymer transmission line makes the 3-dB bandwidth larger and enables 25-Gbit/s operation with CAN-TOSA module.