Point-to-point implementation and measurement for 40Gbps very short reach optical transmission system

This paper presents the design and measurement of 40Gbps very short reach (VSR) parallel optical transmission system. Two Altera Stratix II GX PFGA perform the conversions between SFI5 and VSR5 interface in this system. Main blocks of the conversions including deskew module, slide window, window comparator and frame synchronizer are introduced in detail. Additionally, a 12-channel 40Gbps high speed parallel optical transmitter module is successfully developed and tested with data transmission up to 3.318Gbps. A practical 40Gbps point-to-point measurement is performed by using a parallel BER tester Agilent 81250 where the receiver and transmitter is connected by 10-meter-long 400MHz·km 62.5 μm multi-mode fiber ribbon. The test results show that the system bit error rate (BER) is less than 10^-12.