Single Event Effect and Total Ionizing Dose Assessment of Commercial Optical Coherent DSP ASIC

Abstract

Experimental assessment of commercial 100/200 Gbps optical coherent DSP modem ASIC completed with 64 MeV and 480 MeV proton radiation test campaigns. Single event effect cross sections calculated and no performance degradation observed for proton fluence levels up to 1.27×10 12 p/cm 2 with equivalent total ionizing dose exposure to 170 krad(Si). I. INTRODUCTIONHE Inphi CL20010A1 is an optical coherent digital signal processing (DSP) application-specific integrated circuit (ASIC) modem. The ASIC is a monolithic, 28-nm complementary metal-oxide-semiconductor (CMOS) modem, which supports transmission and detection of 100 Gbps and 200 Gbps information rates with polarization-multiplexed differential and non-differential quadrature phase shift keyed (QPSK) or 16 quadrature amplitude modulated (16-QAM) signals. The CL20010A1 handles host and line framing/deframing, soft-decision forward error correction (SD-FEC) encoding/decoding, and high-speed (~60 GSPS) analog input and output [1]. In addition, the receive channel performs high-speed DSP functions comprising polarization rotation, carrier phase recovery, and optical fiber dispersion compensation. There have not yet been published studies on space radiation testing and qualification of commercial optical coherent transceivers with DSP ASICs.In this work, we experimentally investigated (i) the susceptibility of the CL20010A1 to single event effects (SEEs) and (ii) CL20010A1 performance for increasing levels of fluence and equivalent total ionizing dose (TID). The 64 MeV SEE and TID test campaign was performed at UC Davis Crocker Nuclear Laboratory (CNL), and the 480 MeV SEE Manuscript

Proton radiation assessment of COTS components of 100 Gb/s digital coherent transceiver for optical satellite communications

“…However, the evaluation and screening of such components for use in the space environment is necessary [5]. Evaluations of COTS optical devices operating with signals at more than 100 Gb/s have not been reported, and few evaluations of COTS DSP-ASICs have been reported for proton radiation [6,7] and heavy ion radiation [8]. In [6] and [7], DSP-ASICs were exposed to proton streams, but the impact of the single event effect (SEE) on bit error ratio (BER) was not reported.…”

Assessment of gamma and proton radiation effects on 100 Gbps commercial coherent optical transceiver

“…To develop coherent optical communications systems for space applications, the performance of commercial ASICs must be evaluated with consideration of the radiation effects from the space environment. There have not yet been published studies on space radiation testing and qualification of commercial optical coherent transceivers with DSP ASICs beyond work of the contributing authors [1]. Acacia Communications, Inc. (Acacia) (Maynard, MA) developed the first industry product line of 100 Gigabits per second (Gbps) coherent optical transceivers with DSP ASICs for analog-to-digital conversion and softdecision (SD) forward error correction (FEC).…”

Heavy Ion radiation assessment of a 100G/200G commercial optical coherent DSP ASIC

“…Total ionizing dose (TID) effects and SEEs can also damage supporting microelectronics. Our previous work focused on TID and proton SEE assessments of 100G/200G commercial optical coherent ASICs with 28 nm bulk complementary metal oxide semiconductor (CMOS) technology, specifically the Inphi CL20010A1 and Acacia AC100M coherent DSP ASIC [3], [4]. Our previous work demonstrated the potential of using this technology for a space-based optical coherent communication system.…”