| Jun 28, 2024 |
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(Nanowerk Information) South Korean researchers have developed expertise to mass-produce quantum dot lasers, broadly utilized in knowledge facilities and quantum communications. This breakthrough might scale back semiconductor laser manufacturing prices to one-sixth of their present stage.
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The Electronics and Telecommunications Analysis Institute (ETRI) introduced that they’ve, for the primary time in Korea, developed expertise to mass-produce quantum dot lasers, which had been beforehand restricted to analysis purposes. This was achieved utilizing Metallic-Natural Chemical Vapor Deposition (MOCVD) techniques.
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ETRI’s Optical Communication Parts Analysis Part efficiently developed indium arsenide/gallium arsenide (InAs/GaAs) quantum dot laser diodes on gallium-arsenic (GaAs) substrates, appropriate for the 1.3 µm wavelength band (1260~1360nm) utilized in optical communications.
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They reported tehir findings in Journal of Alloys and Compounds (“High-temperature continuous wave-operation of all MOCVD grown InAs/GaAs quantum dot laser diodes with highly strained InGaAs layer and low temperature p-AlGaAs cladding layer”).
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The ETRI Optical Communication Parts Analysis Part has efficiently developed indium arsenide/gallium arsenide (InAs/GaAs) quantum dot laser diodes on gallium-arsenic (GaAs) substrates, that are appropriate for the 1.3 µm wavelength band (1260~1360nm) utilized in optical communications.
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| Comparability of 2-inch and 6-inch compound semiconductor substrates. (Picture: ETRI)
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Historically, quantum dot laser diodes had been produced utilizing Molecular Beam Epitaxy (MBE), however this technique was inefficient as a result of its gradual progress velocity, making mass manufacturing difficult. By using MOCVD, which has greater manufacturing effectivity, the analysis group has considerably enhanced the productiveness of quantum dot laser manufacturing. Quantum dot lasers are recognized for his or her wonderful temperature traits and robust tolerance to substrate defects, permitting for bigger substrate areas and consequently decrease energy consumption and manufacturing prices.
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The newly developed quantum dot manufacturing expertise boasts excessive density and good uniformity. The produced quantum dot semiconductor lasers demonstrated steady operation at temperatures as much as 75 levels Celsius, exhibiting a world-leading achievement within the outcomes obtained by way of MOCVD.
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Beforehand, optical telecommunication units used costly 2-inch indium phosphide (InP) substrates, leading to excessive manufacturing prices. The brand new expertise, utilizing GaAs substrates, that are lower than one-third the price of InP substrates, is projected to scale back the manufacturing value of communication semiconductor lasers to lower than one-sixth.
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This expertise’s capacity to make use of large-area substrates allows vital reductions in course of time and materials prices.
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The analysis group plans to additional optimize and confirm this expertise to boost its reliability and switch it to home optical communication firms. These firms will obtain key expertise and infrastructure assist via ETRI’s semiconductor foundry, accelerating the commercialization timeline.
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The anticipated discount in growth time and manufacturing prices will improve product worth competitiveness, doubtlessly growing market share internationally. This development is anticipated to spice up the home optical communication element business.
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In trendy society, optical communication serves because the spine of our business. The analysis group’s achievement is ready to revolutionize the event of optical sources, connecting condominium complexes to giant cities and undersea optical cables.
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Professor Dae Myung Geum from Chungbuk Nationwide College, a participant on this analysis, remarked, “The mass production technology for quantum dots can significantly lower the production costs of high-priced optical communication devices, enhancing the competitiveness of the national optical communication component industry and contributing substantially to basic science research.”
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Dr. Ho Sung Kim from ETRI’s Optical Communication Parts Analysis Part said, “This research outcome is a prime example of securing both commercial viability and fundamental innovation, potentially changing the paradigm of the semiconductor laser industry for optical communications.”
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