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Semiconductor Laser Features and Applications

Semiconductor Laser application examples

Semiconductor Laser is used for a variety of applications by taking advantage of characteristics that include straightness, small emission spot size (several um), monochromaticity, high light density, and coherence.
Recently, Semiconductor Laser has been applied for motion sensing, HDD thermal assist magnetic recording, and lighting (projectors and headlamps).

The following table summarizes application examples by Semiconductor Laser function.

[Application Examples by Semiconductor Laser Function]
FunctionFeaturesApplication Example
① ReadHigh-speed reading of ultra-fine signals with micron spotReading of optical discs (i.e. CD, DVD, BD)
② RecordUses high output to change the color of an organic film or phase of a crystal to write a signalRecording on optical discs (i.e. CD, DVD, BD)
③ SensitivityDraws signals by irradiating a photosensitive drumLaser printers, MFPs, etc.
④ CommunicationSupports high-speed modulation for transmitting large amounnts of informationOptical communication in PCs, mobile phones, and more
⑤ LightingPin spot irradiation enables accurate pointingLaser microscopes, pointing markers, line lasers
⑥ MeasurementLess distance attenuation, extending reachMeasure distances of roads and between cars, building height
⑦ SensingEasy to create fringe patterns to detect slight changesSensing applications including smoke alarms, dust management, and laser mice