In collaboration with a Hong Kong-based company, Amonics, a group of researchers led by KONISHI Tsuyoshi (Associate Professor, Graduate School of Engineering, Osaka University) developed a portable measurement device capable of measuring the shape of an ultra-short (femtosecond) optical pulse. It is virtually maintenance-free and fool-proof in operation. This technology will drastically enhance fine processing technology and microscope performance. For example, it will increase the performance of solar energy wafers and make it easy to observe and discover new life phenomenon.

Abstract :

We experimentally realize seamless operations with below 100-fs timing jitter in a 10-GSample/s 3-bit photonic analog-to-digital converter (ADC) with an input 2.5-GHz si-nusoidal electrical signal. To address the energy efficiency, it is necessary to explore some serial approaches to get most operations in a photonic ADC done before serial-to-parallel conversion to save the number of devices. To press forward with the work on subsequent operations after optical sampling in a photonic ADC, we have investigated optical quantization and coding and demonstrated their performances. The experimental results successfully demonstrated seamless operations in a photonic ADC, i.e., sampling, quantization, and coding, while keeping its parallel-configuration-free characteristics and low timing jitter below 100 fs. This demonstration could address the energy efficiency by reduction of the number of devices, including electrical ADCs for subsequent operations after optical sampling in existing high-performance photonic ADCs.

Related Link

• Photonic Information Engineering Discipline, Division of Advanced Science and Biotechnology, Graduate School of Engineering, Osaka University