Diode Laser

A diode laser, also known as an injection laser or  laser diode, 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 (IR) spectrum when current passes through it.

Into the 1980s, it absorbed the physical development of the semiconductor up-to-date results, used some novelty structures, such as quantum well (QW) and strained quantum well (SL-QW), introduced the latest technology of refractive index modulation Bragg launchers and enhanced Bragg modulation transmitter. At the same time, with the new technics development of crystal growth technology, such as MBE, MOCVD and CBE. The new epitaxial growth technology is able to control crystal growth as precision as the accuracy of atomic layer thick. The growth quantum wells and strained quantum well material is high-quality. As a result, production of the LD, which the current threshold of a significant decline, conversion efficiency has been greatly improved the power output doubled and significantly longer service life.

Characteristics and Application:

Diode laser is one kind of the most important practical lasers. Its small size, long life, and a simple way of injection current-pumped to work with the voltage and current circuit-compatible, which can be integrated with a single. And it also can get high-speed modulation of laser output through the high GHz frequency modulation direct current. As a result of these advantages, the diode laser access to a wide range of applications, such as laser communications, optical storage, optical gyros, laser printing, radar range, and so on.

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