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Definition of "Injection Laser" |
Injection laser or diode laser, is a semiconductor device that produces coherent radiation in which the waves are all at the same frequency and phase in the visible or infrared spectrum when current passes through it. Laser diodes are used in optical fiber systems, compact disc players, laser printers, remote-control devices, and intrusion detection systems. / A bandpass filter is a device that passes frequencies within a certain range and rejects frequencies outside that range. |
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