A laser that emits three primary colors, red, green and blue is an RGB laser, the name coming from the three primary colors. These can be emitted in a single beam for all the three colors or a separate beam for each of the color. Through additive mixing which involves combination of the three basic colors at different frequencies, a number of several other colors can be obtained.
RGB laser sources have proven to perform better than other arc lamps beam sources. While the later are normally cheaper sources of beams, they come with limited lifetime, poor image quality and impossibility of high wall-plug efficiency. This is particularly as a result of poor spatial coherence and availability of less color space, a result of which has seen a rapid rise in their demand.
Beams from these sources are known to be coherent in both wavelengths, both in time and space allowing for inferences. If the change in phase properties is able to take place at the same time over a long distance and at the same period of time, then such waves will produce a very clear image. It is possible to cancel such waves with a similar with opposite phase.
The narrow optical bandwidth of the three types of beams produced put them close to monochromatic beams, a property that makes them able to produce very sharp and clear images on color mixing. For this reason, their applications are increasing, not forgetting the use in cathode tubes, lamp based beamers, color printers and many types of projectors.
These beamers however are known to emit beams that are low in power. With cinema projectors requiring over 10 W of power per color, the use of RGB sources is limited. In addition to power insufficiency, there other challenges include maturity and cost effectiveness. There is also a need of better quality of beam for efficient working of these beamers.
This are at times fitted with power-modulators particularly in the instances where the use of optical modulators is not practical due to low-power miniature devices. This is done to achieve better signals and laser diodes are used in most of the occasions. These particular diodes help achieve increased bandwidth to tens or hundreds of megahertz which in turns significantly improves resolutions.
There are many methods of constructing RGB lasers. Three lasers with each emitting a particular light of a wanted color is for instance an approach that has been used for long. These visible light beams are however limited in performance as compared to those that are infrared based.
The other method is the use of an infrared solid-state laser where a single near-infrared laser generate a single color that then undergoes through different stages of nonlinear frequency conversion to produce the three colored beams. There are many other schemes of producing the desired wave lengths such as through combination of parametric oscillators, some frequency mixers and even frequency doublers in addition to other methods.
Technological advancements opens windows for development of a better RGB laser that is capable of overcoming most of the challenges associated with the existing ones. With this possibility, these lasers are predicted to replace all other forms of lasers.
RGB laser sources have proven to perform better than other arc lamps beam sources. While the later are normally cheaper sources of beams, they come with limited lifetime, poor image quality and impossibility of high wall-plug efficiency. This is particularly as a result of poor spatial coherence and availability of less color space, a result of which has seen a rapid rise in their demand.
Beams from these sources are known to be coherent in both wavelengths, both in time and space allowing for inferences. If the change in phase properties is able to take place at the same time over a long distance and at the same period of time, then such waves will produce a very clear image. It is possible to cancel such waves with a similar with opposite phase.
The narrow optical bandwidth of the three types of beams produced put them close to monochromatic beams, a property that makes them able to produce very sharp and clear images on color mixing. For this reason, their applications are increasing, not forgetting the use in cathode tubes, lamp based beamers, color printers and many types of projectors.
These beamers however are known to emit beams that are low in power. With cinema projectors requiring over 10 W of power per color, the use of RGB sources is limited. In addition to power insufficiency, there other challenges include maturity and cost effectiveness. There is also a need of better quality of beam for efficient working of these beamers.
This are at times fitted with power-modulators particularly in the instances where the use of optical modulators is not practical due to low-power miniature devices. This is done to achieve better signals and laser diodes are used in most of the occasions. These particular diodes help achieve increased bandwidth to tens or hundreds of megahertz which in turns significantly improves resolutions.
There are many methods of constructing RGB lasers. Three lasers with each emitting a particular light of a wanted color is for instance an approach that has been used for long. These visible light beams are however limited in performance as compared to those that are infrared based.
The other method is the use of an infrared solid-state laser where a single near-infrared laser generate a single color that then undergoes through different stages of nonlinear frequency conversion to produce the three colored beams. There are many other schemes of producing the desired wave lengths such as through combination of parametric oscillators, some frequency mixers and even frequency doublers in addition to other methods.
Technological advancements opens windows for development of a better RGB laser that is capable of overcoming most of the challenges associated with the existing ones. With this possibility, these lasers are predicted to replace all other forms of lasers.
No comments:
Post a Comment