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Journals and Conferences
To address the two main challenges concerning the design of a transimpedance amplifier (TIA), namely, improving the sensitivity of the TIA without sacrificing bandwidth and suppressing inter-symbol interference (ISI) due to insertion loss, a 25 Gb/s optical receiver (RX) based on 65 nm CMOS technology, including a TIA and a PD operating at 1.3 μm… (More)
This paper describes the design and experimental results of a 17 Gb/s vertical-cavity surface-emitting laser (VCSEL) driver using a double-pulse asymmetric emphasis technique. In this technique, the first pulse compensates for the parasitic capacitances and the second pulse compensates for the ringing, which enables a good eye opening even when the data… (More)
This paper describes the design and experiment results of 25 Gbps, 4 channels optical transmitter which consist of a vertical-cavity surface emitting laser (VCSEL) driver with an asymmetric pre-emphasis circuit and an electrical receiver. To make data transfers faster in directly modulated a VCSEL-based optical communications, the driver circuit requires an… (More)
A 25-Gb/s × 4-ch optical transceiver module was developed. To obtain a compact module, CMOS analog front-end ICs, a lens integrated connector, and small LGA package was applied. The module demonstrated 25-Gb/s error-free transmission.
A compact optical backplane was developed, and a ribbon fiber sheet and high-density connector were used to reduce the cost and wiring area. A bandwidth of 7.2-Tb/s was achieved within a 288 × 53 mm<sup>2</sup> area inside the network equipment.
A 25 Gb/s × 4-ch, 8 × 8 mm<sup>2</sup> optical transceiver module for optical interconnection has been developed. To obtain a compact optical module suitable for chip-to-chip interconnection, a lens integrated connector, a small low temperature co-fired ceramic (LTCC) package, and a precise lens assembling technology were used. Experimental… (More)
A diagnostic ultrasound (US) system transmits acoustic waves at several to tens of MHz into the human body for clinical purposes and detects the reflected waves to observe the internal organs without having a medical operation or radiation exposure. The system is composed of a main unit and probe connected via coaxial cables. The probe is very small because… (More)
A high-stability and high-speed optical transceiver module for a chip-to-chip optical interconnection has been developed. The stability of optical power output is provided by optimizing the packaging structure snd thus reducing deformation of the module resulting from the bimetallic effect. (Degradation of optical coupling efficiency is reduced to 0.15 dB… (More)
Growing data traffic requires low-power 25Gb/s-class optical interconnects for board-to-board transmission inside ICT systems [1-4]. The main power consumption of an optical link strongly depends on the sensitivity of the TIA; thus, development of a high-sensitivity TIA is a key to creating a low-power optical link., There are two challenges concerning the… (More)