VLM-532-43-LCC

Laser Diodes, Modules

VLM-532-43-LCC is a kind of semiconductor lasers, also known as laser diode or just laser, which has the function of converting electrical energy into laser radiation. It finds its main application in optical communications, optical storage, printing, medical, and other areas.

Application Field

VLM-532-43-LCC is mainly applied in the field of optical communication. It is actually an edge-emitting laser diode. Its emission wavelength is in the vicinity of 520nm. These kinds of laser diodes are usually used in the construction of fiber optical transmitters. The laser diode, with its low cost, low power consumption, long life, small package, and high speed, provides a good solution in transmitting data and information in a fiber optic communication system. Additionally, these laser diodes are also suitable for the applications in optical storage systems, especially in applications with the requirements of high density and high speed.

Apart from being used in optical communication and optical storage, laser diodes are also mainly used in products such as laser printers and CD or DVD players. It is almost impossible to find a laser printer without the help of a laser diode. Primarily because a laser diode is designed to make a precise and targeted laser beam with the help of its current operating voltage. As for the CD or DVD players, laser diodes are also used in them for the same reason: to precisely and accurately portray the data in an efficient and faster rate.

Working principle

A laser diode is quite similar to other semiconductor devices, such as p-n junction diodes or transistors. The chip of a laser diode is made of semiconductor material which isdoped with impurities in such a way that it forms a p-n junction. The results of the impurity doping is that there are pairs of electron-hole within the device, and when these electrons and holes recombine, they will transform energy into photons of laser beam.

The working principle of a laser diode is quite simple and easy to understand. The operation of a laser diode device is based on the application of DC electrical current through the chip. This current will then induce a currentin the junction, and when it reaches the threshold value, the current will exchange from one side of the diode’s junction to the other side.When this current exchange takes place, the electrical energy is released in the form of laser beam or photon.

It is essential to point out that the quantum efficiency of a laser diode might be varied by changing its electrical power supply. For example, when the energy supply of the diode in the photoelectric effect region is removed, then the efficiency of the laser diode will decrease. On the other hand, increasing the energy supply would lead to the increase of the quantum efficiency of the diode.