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Energy efficient 850-nm VCSEL based optical transmitter and receiver link capable of 56 Gbit/s NRZ operation

: Ledentsov, N.; Agustin, M.; Chorchos, L.; Kropp, J.R.; Shchukin, V.A.; Kalosha, V.P.; Köpp, M.; Caspar, C.; Turkiewicz, J.P.; Ledentsov, N.N.


Choquette, K.D. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Vertical-Cavity Surface-Emitting Lasers XXIII : 6-7 February 2019, San Francisco, California, United States
Bellingham, WA: SPIE, 2019 (Proceedings of SPIE 10938)
ISBN: 978-1-5106-2519-8
ISBN: 978-1-5106-2518-1
Art. 109380J, 8 pp.
Conference "Vertical-Cavity Surface-Emitting Lasers" <23, 2019, San Francisco/Calif.>
Conference "Optoelectronics, Photonic Materials and Devices" <2019, San Francisco/Calif.>
Photonics West Conference <2019, San Francisco/Calif.>
Conference Paper
Fraunhofer HHI ()

Optical VCSEL-based links operating in on-off keying (OOK) modulation represent a robust energy-efficient solution for short-reach optical interconnects in datacenters. We report on the optical and electronic elements of such link and their integration into the transmitter (TR) and receiver (RX) assemblies. A single channel transceiver link capable of 40-56 Gbit/s OOK transmission over multimode fiber at record energy-efficiency of ~4.5 pJ/bit is demonstrated. VCSEL driver and receiver transimpedance amplifier (TIA) circuits capable of generating 80-100 Gbit/s error-free signals are characterized on a special test-board assembly. Real-time 56 Gbit/s transmission experiments of the complete link are done, resulting in bit-error ratios (BER) below standard Forward Error Correction (FEC) levels without equalization or signal processing.