Raman spectroscopy, as a label-free, nondestructive fingerprint detection technique, has been widely used in various application fields, including trace-molecule detection, biomolecular analysis, chemical analysis, material characterization, bioassay, and archeological and criminological identification. However, normal Raman signals are too low to be detected, which limits the application of Raman spectroscopy in many fields.
Sixty years ago, the first laser was successfully fired on May 16, 1960 by Dr. Theodore Maiman. Seven weeks later, Dr. Maiman and his employer, Hughes Aircraft Company, presented laser to the world at a press conference in Manhattan.
About 600kg of third-generation hybrid rice seeds was sorted at a speed of 20kg/h last week, with the help of aprototype developed by Changchun Institute of Optics, Fine Mechanics and Physics (CIOMP) of the Chinese Academy of Sciences.
The explosive growth of internet use leads to an explosion of the energy consumption of data centers. Vertical cavity surface emitting lasers VCSELs are key enabling devices meeting the requirements of optical interconnects in such data centers up to a few hundred meters of single or multimode fiber due to their simplicity, low cost, and large data transmission rates. Achieving larger bit rates has been the stated goal of research and development during the last years. The bit rate can be increased by individual VCSEL optimization, that increases bandwidth and by approaches that increase the spectral efficiency M using e.g. predistortion or forward error correction, by higher modulation formats like PAM4.
The laser technology has just turned 60. Once the epitome of cutting-edge technology, it is practically ubiquitous, found in almost all areas of life and work. However, it would be a big mistake to write off laser as old and out-of-date, as it is now still an essential tool used in the development of all manners of brilliant innovations.
The explosive growth of internet use leads to an explosion of the energy consumption of data centers. Vertical cavity surface emitting lasers VCSELs are key enabling devices meeting the requirements of optical interconnects in such data centers up to a few hundred meters of single or multimode fiber due to their simplicity, low cost, and large data transmission rates. Achieving larger bit rates has been the stated goal of research and development during the last years. The bit rate can be increased by individual VCSEL optimization, that increases bandwidth and by approaches that increase the spectral efficiency M using e.g. predistortion or forward error correction, by higher modulation formats like PAM4.
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