High temperature operation characteristics and reliability of an ultra-small silicon photonics transceiver equipped with a quantum dot laser up to an ambient temperature of 105°C are reported. An ultra-small silicon photonics transceiver of 5 by 5 mm size, called IOCore, is integrated with an optical transceiver of 32Gbps (PCIeGen5.0) by 4 lanes. The combination of Fabry-Perot quantum dot laser and Mz modulator provides good transmit/receive characteristics at 32Gbps * 4 lanes at an ambient temperature of 105 degreesC. Reliability tests showed that the quantum dot laser was estimated to have a very high lifetime of 5.6fit when used at 105 degreesC. at 10 degreesC. IOCore can be applied to onboard optics for devices that are difficult to replace in case of failure, or to outdoor optical modules that require I-Temp. Some examples of module development are shown.
IOCoreTM is a 5 mm × 5 mm silicon photonic micro transceiver with a multimode interface. IOCore features four lanes for transmitting and receiving, and 25 Gbps/lane and 32 Gbps/lane have been released. A Fabry-Perot quantum dot laser in the 1.3 micrometer band is applied as the light source. This facilitates low-cost assembly with a multimode coupling interface and robust connectivity at high temperatures. With the increasing power consumption of IT equipment, there is a need to respond to high temperature operation and excellent cooling capacity using immersion cooling technology. In recent years, it has been proposed to mount the transceiver on the system board or LSI package to achieve high throughput with low power consumption. These transceivers require high reliability because they are difficult to repair. This study summarizes and reports on the design and evaluation of IOCore, which has been partially published previously, including its high temperature operation (105 °C), suitability for immersion systems, and reliability.
The amount of data processed by information and communications technology (ICT) equipment has significantly increased in recent years. As the power consumed by each board and rack continues to increase, the study of the immersion cooling technique with high cooling capacity has become increasingly widespread. We have developed an optical transceiver called “IOCoreM” based on Si photonics technology. In this paper, we report the results of the evaluation of the immersion cooling of IOCore.
We report on the design and performance of a silicon photonic micro-transceiver required to operate in high ambient temperature environments above 105°C. The four channel “I/O core” micro-transceiver incorporates a 1310 nm Quantum Dot laser system and operates at a data-rate of 32 Gbps per lane. The 5mm x 5mm micro-transceiver chip benefits from a multimode coupling interface for low-cost assembly and robust connectivity at high temperatures and an optical redundancy circuit, increasing reliability by over an order of magnitude. I/O core is a photonic building block used to construct more complex application-customized modules such as 512 Gb/s modules for HPC, 5G and AI systems.
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