Oki Semiconductor 
OKI Semiconductor already offers an EML with 1.55 μm wavelength band compliant with XLMD-MSA for 40 Gbps. This device has a transmission range of around 2 km.
http://www.okisemi.com/en/company/news/r20100405.htmhttp://
Oki Semiconductor 
OKI Semiconductor already offers an EML with 1.55 μm wavelength band compliant with XLMD-MSA for 40 Gbps. This device has a transmission range of around 2 km.
http://www.okisemi.com/en/company/news/r20100405.htmhttp://