Eoptolink has released QSFP28 100G loopback, for more information, questions and samples, please, contact with us.

Ordering information, PN:

EOLQ-1HG-XLB-1 1.5~2W 
EOLQ-1HG-XLB-2 2~2.5W 
EOLQ-1HG-XLB-3 2.5~3W 
EOLQ-1HG-XLB-4 3~3.5W 
EOLQ-1HG-XLB-5 3.5~4W 
EOLQ-1HG-XLB-6 4~4.5W 
EOLQ-1HG-XLB-7 4.5~5W