Oclaro, Inc. announced the first live interoperability demo showcasing a 100G ER4-Lite QSFP28 and CFP2 over 40km single-mode optical fiber (SMF). Taking place in the Oclaro booth #2747 at this week's OFC, this live demo highlights how ER4-Lite solutions are delivering the low power and low cost needed to expand 100G connections to the access and core networks where longer reach is required. 100G client interfaces are primarily used in datacenter and metro networks where 10km reach is sufficient to cover most of the applications (Intra-datacenter, large or multi-campus or central-office connectivity). As 100G technology gets more widely deployed in less populated metro and access networks, network operators require 100G client interfaces to extend up to 40km without use of optical amplifiers. The new ER4-Lite specification enables cost-effective 100G 40km pluggable solutions in compact QSFP28 transceivers that use Forward Error Correction (FEC) and APD-based receivers. As a leader in this market, Oclaro is now meeting this demand with ER4-Lite solutions for both the CFP2 and QSFP28 form factors. The QSFP28 ER4-Lite is sampling and joins the Oclaro ER4-Lite CFP2, which has been shipping in volume since 2015. To develop this transceiver, Oclaro leveraged its proven 28G EML that has demonstrated superior quality and high performance in the Oclaro CFPx and QSFP28 LR4 product families. The Oclaro ER4-Lite QSFP28 supports both 100GbE and OTU4 applications and supports up to 40km with FEC and up to 30km without FEC and will interoperate with existing ER4 solutions in the field up to 30km. The QSFP28 has been standardized by ITU-T as G.959.1 4L1-9D1F and is under standardization in the newly established 4-Wavelength WDM MSA Group.