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.
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 fiber-opt
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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. view more
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 through joint res
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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). view more
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 skins and hot w
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.