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Laser diodes are the most common type of lasers produced, with a wide range of uses that include fiber-optic communications, barcode readers, laser pointers, CD/DVD/Blu-ray disc reading/recording, laser printing, laser scanning and light beam illumination.
Laser Diodes have been employed many times as light sources on different kinds of optical sensors. Their main function in these applications was the emission of an optical radiation impinging onto a certain object and, according to the characteristics of the reflected light, some information about this object was obtained.
Application is going to define the major parameters of a laser diode: wavelength, power, and package style. Once known, the next set of choices revolves around mounting a laser diode and choosing the appropriate drivers, regulators, and choosing the placement of the diode within the lab.
11 mar 2014 · The photodiode measures the optical power produced by the laser and, in using this measurement, the driver can regulate optical output power over extended periods regardless of the temperature or changes in performance as the laser ages.
The output power of a diode laser is a function of the operating current. P out = output power; I = current; th = threshold; T = temperature; j = junction (the place where laser radiation originates in the laser chip); I op = operating current driving the diode laser.
This wiki explains the main figures of merit of the electro-optical characterization of laser diodes, such as the P/I curve, laser threshold, efficiency and I/V.
Laser diodes find wide applications in optical fiber communications, data recording and reading, sensing and measurements, material processing, etc., because laser diodes can offer wide range of wavelength selections from purple to
