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Environmental Technology Development
- Conducting basic research and development in energy conservation, clean energy, hazardous substance detection and detoxification, and other fields
| Ultra low-voltage input booster technology At NTT Energy and Environment Systems Laboratories, we have been researching and developing ultra low-voltage input booster technology which can play a significant role in boosting the performance of photovoltaic panels, a source of clean energy. In conventional photovoltaic panels connected using DC electricity, the entire panel loses the ability to generate power efficiently if only one cell in the panel became cracked or covered by shade. The new technology enables an ultra-low 0.3 volt current produced by sunlight in a panel to be boosted to 5 volts, the voltage required to run devices, and also stabilizes output while boosting it. This technology can be used in solar powered mobile phone rechargers or in the recharging units of outdoor stand-alone, low-capacity solar power supplies, and is expected to be useful in a range of applications in the age of ubiquitous broadband communications.  A technology for detecting harmful substances developed by NTT Energy and Environment Systems Laboratories uses a simple accumulation-type sampler to measure local ozone levels. Ozone is a primary component of photochemical oxidants and considered to be a harmful atmospheric pollutant. However, given its superb cleaning and sterilization properties, it is likely to continue to be used in various commercial and industrial applications. The new ozone sampler, which measures the degree of color fading of chemically treated paper that reacts selectively to ozone, comes in the form of a simple badge that indicates individual ozone exposure levels. This technology is expected to contribute to occupational safety for those working in waterworks departments, food processing services, and various cleaning industries.   NTT Photonics Laboratories has developed a 10-Gbit/s directly modulated laser module for high temperature applications. Laser modules used in high-speed optical access systems need to be compact and energy-efficient to reduce environmental impacts. Developing laser modules that operate stably at high temperatures without requiring cooling devices was essential to meeting such demands. NTT Photonics Laboratories applied high resistance semi-insulating structures doped with ruthenium to both sides of a directly modulated laser to create a laser chip that delivers 10-Gbit/s direct modulation at the high temperature of 85°C. In the future, the lab hopes to develop an optical transmission module capable of operating at even higher temperatures. |
| Activities | Company |
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| Success in trapping light for over one nanosecond and in slowing down the speed of light 50,000 times | NTT Basic Research Laboratories |
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