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Researchers Generate Laser Pulses at a Higher Repetition Rate

Researchers Generate Laser Pulses at a Higher Repetition Rate
Written by AZoOpticsJan 20 2021
Pulsed lasers tend to emit light repeatedly for a short period as if they blink. They can focus more energy compared to a continuous wave laser, whose intensity remains unaltered over time.
Abstract illustration. Image Credit: Korea Institute of Science and Technology.
Loading of digital signals in a pulsed laser enables each pulse to encode one bit of data. In this case, the repetition rate is directly proportional to the amount of data that can be transmitted. But traditional optical-fiber-based pulsed lasers have essentially been unable to increase the number of pulses per second above the megahertz (MHz) level. ....

Jwon Song , Kyongsang Bukto , South Korea , Seong Jae Lee , Institutional Rd Program , Korea Institute Of Science , Ministry Of Science , Korea Institute , Senior Researcher Dr Yong Won Song , Opto Electronic Materials , Principal Researcher Song , Jae Lee , வென்றது பாடல் , தெற்கு கொரியா , சேஓங் ஜே லீ , நிறுவன ர்ட் ப்ரோக்ர்யாம் , கொரியா நிறுவனம் ஆஃப் அறிவியல் , அமைச்சகம் ஆஃப் அறிவியல் , கொரியா நிறுவனம் , மூத்தவர் ஆராய்ச்சியாளர் டாக்டர் யோங் வென்றது பாடல் , ஒப்தொ மின்னணு பொருட்கள் , ப்ரிந்ஸிபல் ஆராய்ச்சியாளர் பாடல் , ஜே லீ ,

Optical data transmission speed increased by a factor of at least 10,000

Credit: Korea Institute of Science and Technology(KIST)
Pulsed lasers repeatedly emit light for a short period of time as if blinking. They have the advantage of focusing more energy than a continuous wave laser, whose intensity is kept unchanged over time. If digital signals are loaded in a pulsed laser, each pulse can encode one bit of data. In this respect, the higher the repetition rate, the more the amount of data that can be transmitted. However, conventional optical-fiber-based pulsed lasers have typically had a limitation in increasing the number of pulses per second above the MHz level.
The Korea Institute of Science and Technology (KIST) announced that the research team led by Senior Researcher Dr. Yong-Won Song at the Center for Opto-Electronic Materials and Devices was able to generate laser pulses at a rate at least 10,000 times higher than the state of the art. This achievement was accomplished by inserting an additional resonator containing graphene into a ....

Jwon Song , Kyongsang Bukto , South Korea , Seong Jae Lee , Institutional Rd Program , Korea Institute Of Science , Ministry Of Science , Korea Institute , Senior Researcher , Yong Won Song , Opto Electronic Materials , Principal Researcher Song , Fourier Transform , Researcher Song , Chemistry Physics Materials Sciences , Technology Engineering Computer Science , வென்றது பாடல் , தெற்கு கொரியா , சேஓங் ஜே லீ , நிறுவன ர்ட் ப்ரோக்ர்யாம் , கொரியா நிறுவனம் ஆஃப் அறிவியல் , அமைச்சகம் ஆஃப் அறிவியல் , கொரியா நிறுவனம் , மூத்தவர் ஆராய்ச்சியாளர் , யோங் வென்றது பாடல் , ஒப்தொ மின்னணு பொருட்கள் ,

Chemotherapy with light; only one injection required

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IMAGE: A schematic diagram of the application of cancer-targeted supermolecular peptide phototherapy drugs to animal experiments developed by KIST researchers. A single supermolecular peptide phototherapy injection and repeated phototherapy were used.
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Credit: Korea Institute of Science and Technology(KIST)
Researchers in South Korea have developed a phototherapy technology that can significantly increase efficiency while reducing the pain of chemotherapy and minimizing side effects after treatment. The President of Korea Institute of Science and Technology (KIST), Seok-Jin Yoon announced that a research team led by Dr. Sehoon Kim at the Theragnosis Research Center (KU-KIST Graduate School of Converging Science and Technology) has developed a cancer-targeted phototherapeutic agent that promises complete elimination of cancer cells without side effects. It involves only one injection and repeated phototherapy. This development was made th ....

Soult Ukpyolsi , South Korea , Yoon Sik Lee , Dong June Ahn , Seokjin Yoon , Institutional Rd Program , Korea University , Theragnosis Research Center , Seoul National University , Korea Institute Of Science , School Of Converging Science , Ministry Of Science , Korea Institute , Se Hoon Kim , Converging Science , Professor Dong June Ahn , Professor Yoon Sik Lee , Seoul National , Director Se Hoon , Medicine Health , Technology Engineering Computer Science , தெற்கு கொரியா , யூன் சிக் லீ , டாங் ஜூன் அஹ்ன் , நிறுவன ர்ட் ப்ரோக்ர்யாம் , கொரியா பல்கலைக்கழகம் ,

Energy harvesting made possible with skin temperature

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IMAGE: Conceptual illustration of a compliant TEG with soft electrodes and soft heat conductors (s-HCs) for self-powered circuit applications. The left inset is a photograph of bismuth telluride (Bi2Te3)-based thermoelectric (TE).
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Credit: Korea Institute of Science and Technology(KIST)
A thermoelectric device is an energy conversion device that utilizes the voltage generated by the temperature difference between both ends of a material; it is capable of converting heat energy, such as waste heat from industrial sites, into electricity that can be used in daily life. Existing thermoelectric devices are rigid because they are composed of hard metal-based electrodes and semiconductors, hindering the full absorption of heat sources from uneven surfaces. Therefore, recent studies were actively conducted on the development of flexible thermoelectric devices capable of generating energy in close contact with various heat sources such as human ....

Soult Ukpyolsi , South Korea , Seungjun Chung , Yongtaek Hong , Creative Convergence Research , Nature Communications , Computer Engineering At Seoul National University , Institutional Rd Program , Department Of Electrical , Materials Research Center , Korea Institute Of Science , Ministry Of Science , Korea Institute , Soft Hybrid Materials Research Center , Professor Yongtaek Hong , Computer Engineering , Seoul National University , Creative Materials Discovery Program , National Research Foundation , Creative Convergence Research Project , Global Frontier , Chemistry Physics Materials Sciences , Technology Engineering Computer Science , தெற்கு கொரியா , படைப்பு குவிதல் ஆராய்ச்சி , இயற்கை தகவல்தொடர்புகள் ,

New Nanomagnetism Principle for Next-Generation Memory Devices

New Nanomagnetism Principle for Next-Generation Memory Devices
Written by AZoNanoJan 13 2021
The Korea Institute of Science and Technology (KIST) reports that a team of researchers under Dr Kyoung-Whan Kim from the Center for Spintronics has come up with a new principle for spin memory devices regarded as the next-generation memory devices.
Dr Kyoung-Whan Kim at the Center for Spintronics, KIST. Image Credit: Korea Institute of Science and Technology.
The advancement represents new applicability that varies from the current paradigm. Traditional memory devices are categorized into volatile memories, like RAM, which can read and write data rapidly, and non-volatile memories, like hard-disk, on which data are retained even when there is no power. ....

South Korea , Kyoung Whan Kim , Institutional Rd Program , Korea Institute Of Science , Ministry Of Science , Korea Institute , New Research Support Program , National Research Foundation , Generalized Spin Drift Diffusion Formalism , Spin Orbit Interaction , Physical Review , தெற்கு கொரியா , நிறுவன ர்ட் ப்ரோக்ர்யாம் , கொரியா நிறுவனம் ஆஃப் அறிவியல் , அமைச்சகம் ஆஃப் அறிவியல் , கொரியா நிறுவனம் , புதியது ஆராய்ச்சி ஆதரவு ப்ரோக்ர்யாம் , தேசிய ஆராய்ச்சி அடித்தளம் , சுழல் ஆர்‌பிட் தொடர்பு , உடல் விமர்சனம் ,