A look at Mellanox's 100Gbs Transceiver https:
Post# of 871
https://store.mellanox.com/products/mellanox-...-10km.html
Look at the price, LWLG standalone 100Gbs modulator will be done in 2018 and the price of a Transceiver built with LWLG OSA's will be so much dramatically lower it is not even funny!