10 Gbps/ch Full-Duplex Optical Link Using a Single-Fiber Channel for Signal Transmission

• Published in: IEEE photonics technology letters Vol. 26; no. 6; pp. 609 - 612
• Main Authors: Nga, Nguyen T. H., Sangirov, Jamshid, Gwan-Chong Joo, Byueng-Su Yoo, Ukaegbu, Ikechi A., Tae-Woo Lee, Mu-Hee Cho, Hyo-Hoon Park
• Format: Journal Article
• Language: English
• Published: New York IEEE 15.03.2014; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Fiber optic networks; Integrated optics; mirrors; Optical crosstalk; Optical fiber communication; Optical fiber sensors; Optical fibers; optical subassembly; Simultaneous bidirectional optical interconnect; Vertical cavity surface emitting lasers; wavelength-filtering layer
• ISSN: 1041-1135; 1941-0174
• DOI: 10.1109/LPT.2014.2301742

A 10 Gbps/ch full-duplex (simultaneous bidirectional) optical link utilizing two optical subassembly (OSA) transceiver (TRx) modules and two wavelengths, 850 and 1060 nm, for sending and receiving optical signals through a single fiber channel in a fiber array is demonstrated. Each of the OSA TRx modules consists of transmitter/receiver chips, optical fibers embedded in a V-grooved silicon substrate, two 45 ° mirrors formed in fibers, and three silicon optical benches for mounting vertical-cavity surface-emitting lasers, photodiodes (PDs), and monitoring PDs. Mirror-1 in the fiber is coated with a wavelength-filtering layer to reflect transmitted light and pass through received light. Mirror-2 deflects received light to the PD. Two OSA TRx modules were applied in an end-to-end quad small form-factor pluggable optical link for 40-Gbps operation. This optical link showed good performance with clear eye-diagrams and a BER of at <;10 -12 Gbps/ch with -8-dBm input power.