The laser light source is based on semi-polar GaN laser diodes, White Light Illuminator combined with advanced phosphor technology. Since the laser concentrates on a tiny point on the phosphor to emit light and convert it into white light, the light source can output a safe and highly collimated white light. White Light Illuminator Based on the laser-based method, its properties include increasing the temperature much lower than the LED. Laser pumping is also practical because the device is very easy to obtain near the UV emission and can effectively play this role.
The process from LED to laser does not happen overnight. On the contrary, in the foreseeable future, LED-based lamps will still be the main means of generating white light. However, White Light Illuminator solid-state lighting systems based on laser diodes have been used in high-brightness lighting applications, and now several manufacturers have already produced them.
The driving force behind the development of laser diode-pumped lamps is to avoid LED efficiency degradation. But that's not the only benefit. In addition to Soraa and several others, the manufacturers of other LED sources use chips that do not contain wavelengths shorter than about 450 nm. Thus,White Light Illuminator when using these inexpensive LEDs with peak wavelengths of 450-460 nm for phosphor pumping, the resulting light source is insufficient in the purple portion of the spectrum.
The advantages of laser pump light sources have attracted the attention of car manufacturers, they are actively for high-end models installed on the laser headlights.White Light Illuminator Like LED lighting in the automotive industry as the penetration of high-end models to lead the trend, which includes some of the BMW models
Unlike LEDs, different arrangements are required when using a laser diode to pump the phosphor. Due to the directional nature of the laser radiation and its high strength, it is not possible to simply deposit the phosphor at the top of the pump. In contrast, White Light Illuminator more optical arrangements are required, White Light Illuminator such as a combination of a phosphor plate and a reflector, or a phosphor-coated integrating sphere
For both methods, one or two diodes can be pumped by using a suitable technique to combine multiple laser beams. This means that there is no upper limit on the optical power of the laser pumped optical module. White Light Illuminator Another advantage of using a remote pumping structure is that the phosphor is not on the hot component, which prevents the phosphor from heating during operation, greatly extending its service life.
The biggest drawback of laser pumped white light sources is diode-related. First of all, the price of this chip is much higher than the LED. Although widely used in data storage applications, laser diodes are much more expensive than LEDs for equivalent light levels. Due to its high cost, White Light Illuminator laser pumped phosphor systems are expensive and can only be deployed in specialized, less costly lighting applications.
One of the advantages of laser pumped lighting systems is that they can cover a wide range of output power. Commercial laser diodes have a power rating from a few milliwatts to a few watts, White Light Illuminator and a more powerful source can be formed by combining the outputs of several lasers. However, this is not conducive to the life of the system. This is because the diode life is lower than the LED life, especially when they work at high drive current.