Does the OM4 support 40G optical modules
The QSFP-40G-SR4 module supports link lengths of 100 meters and 150 meters, respectively, on laser-optimized OM3 and OM4 multimode fibers. It primarily enables high-bandwidth 40G optical links over 12-fiber parallel fiber terminated with MPO/MTP multifiber female. As technology evolves and standards are completed to define data rates such as 40/100G, Fibre Channel (32G and beyond) and InfiniBand (40G and beyond), the cabling infra-structures installed today must provide scalability to accommodate the need for more bandwidth in support of future applications. Two of the most widely deployed laser-optimized multimode fibers are OM3 and OM4, both designed to support high-speed data transmission using VCSEL-based optical modules. However, despite their similar core size and compatibility, these two fiber standards differ in modal bandwidth, maximum. As an advancement of OM3 fiber, OM4 fiber is chiefly used for 10G, 40G and 100G Ethernet. For copper both QSFP+ to QSFP+ (40G to 40G) and QSFP+ to SFP+ (40G to 4x10G) cables enable short reach options.
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