Compact bidirectional optical subassembly vertically stacked with 1.25-Gbps transmitter and 10-Gbps receiver for passive optical networks

摘要

Abstract. A compact bidirectional optical subassemblyn(BOSA) for a 1.25/10-Gbps passive optical network is de-nveloped. A vertically stacked 1.25-Gbps transmitter based onna silicon optical bench, and a 10-Gbps receiver based on anlow temperature cofired ceramic are implemented to realizenlow-cost manufacturing and miniaturization for single pack-nage application. The proposed BOSA delivers an extinctionnratio more than 10 dB at 1.25-Gbps modulation, optical out-nput coupling efficiency is more than 60%, rise and fall time isnunder 300 ps, and the side mode suppression ratio is morenthan 35 dB for the transmitter part. For the receiver part,nresponsivity is more than 0.6 A/W, and sensitivity is lowernthan –17 dBm at a 10-Gbps bit error rate 10–12 and –21 dBmnat BER 10–3 without forward error correction. The cross talknbetween receiver and transmitter is less than –53 dB up ton10 GHz, and optical isolation is 33 dB. C u00022010 Society of Photo-nOptical Instrumentation Engineers. [DOI: 10.1117/1.3506718]