What is a Laser Diode Driver

Basically, a laser diode driver is a constant current source known for being linear, noiseless and accurate that will deliver just the exact current to the laser that is required for a given application. Users will have the option of keeping the laser diode or the photodiode current constant or at wheel level. It is the control system that will drive the current to the laser safely and at the required degree.

The laser diode drivers vary so much in feature sets and their performance. Read on and see some of the things and basics worth knowing of when it comes to laser diode drivers.

First and foremost, know of the facts on laser diode. The laser diode drivers serve mainly to provide current to the laser diode. As for the uses of the laser diodes, there are quite a number of the uses to which these can be put to. These are such as where they are used for spectroscopy, medical diagnostics and analytical equipment, remote sensing, particle sizing and counting, welding and material processing to mention but some of the most common ones in a list of many others. This is often indicated in most application settings by the initials or short form of laser driver , LD.

The other basic aspects to know of when talking of the laser diodes and drivers are the photodiodes that we already have had a mention of above. It is at times the case that you will have your laser diode package coming integrated with the monitor photodiode. Oftentimes, you will come to notice the fact that the monitor photodiode that so comes as an integrated component with the laser diode drivers will in most cases be producing a current that is equal or thereabouts to the output laser diode optical power. The one thing that needs to be as clear when it comes to the laser diode packages is that they really happen to differ a lot one from another and as well the photodiode transfer functions as well happen to differ as well in equal measure. As for their indications, they are as well abbreviated, PD and will be indicated as well with the wavy arrows on the device.

Talking of the other essential features that need to be known of when it comes to the laser diode drivers tec controller is that referred to as the Feedback Mode. Most of the laser drivers will always allow control based on either of the two currents, laser diode current or the photodiode current. Oftentimes where you happen to be using laser diode current as feedback, then it is often the case that the control system will in most cases ensure that this is kept constant, as we had seen somewhere above. Where this is the case, you will often realize that the output of the Adjustable Current Source will in most cases not vary.

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