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21 November 2017 Cost-effective parallel optical interconnection module based on fully passive-alignment process
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In optical interconnection technology, high-speed and large data transitions with low error rate and cost reduction are key issues for the upcoming 8K media era. The researchers present notable types of optical manufacturing structures of a four-channel parallel optical module by fully passive alignment, which are able to reduce manufacturing time and cost. Each of the components, such as vertical-cavity surface laser/positive-intrinsic negative-photodiode array, microlens array, fiber array, and receiver (RX)/transmitter (TX) integrated circuit, is integrated successfully using flip-chip bonding, die bonding, and passive alignment with a microscope. Clear eye diagrams are obtained by 25.78-Gb/s (for TX) and 25.7-Gb/s (for RX) nonreturn-to-zero signals of pseudorandom binary sequence with a pattern length of 231 to 1. The measured responsivity and minimum sensitivity of the RX are about 0.5  A/W and ≤−6.5  dBm at a bit error rate (BER) of 10−12, respectively. The optical power margin at a BER of 10−12 is 7.5 dB, and cross talk by the adjacent channel is ≤1  dB.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE) 0091-3286/2017/$25.00 © 2017 SPIE
Dong Hoon Son, Young Soon Heo, Hyoung-Jun Park, Hyun Seo Kang, and Sung Chang Kim "Cost-effective parallel optical interconnection module based on fully passive-alignment process," Optical Engineering 56(11), 110503 (21 November 2017).
Received: 26 August 2017; Accepted: 1 November 2017; Published: 21 November 2017

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