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Laser is short for Light Amplification by Stimulated Eimission of Radiation. Lasers is basicly made of an active medium that is emitting light when it's so called pumped with energy. This pumping can be electricity, or external light. When a medium is active, such as when a HeNe gas is pumped with electric charge, it radiates light. This light is then placed between two parallell mirrors which makes a virually infinite number of copies of this light between those two mirrors. In the directions angular to these mirror, the light from the HeNe gas is amplified by allowing the photons go back and forth between the mirrors. However, when the HeNe gas is pumped with a seretain amount of energy, there is more active gas-molecules than those inactive which is absorbing the light. This is called the lease threshold, from which point allows the light to be amplified instead of absorbed by its own HeNe gas. So from this point the laser starts to radiate laser light. Some of this light must exit one of the mirrors, so one mirror is not fully reflective, but maybe 90% or so. These lasers is called gas-lasers. Also low efficient lasers. Typically 5 - 10% efficiency. Light pumped solid state laser: A chrystal is pumped with external light. This can be a ruby-chrystal. The ruby, especially synthetic ruby, is a very florucent chrystal that emitts light in all directions when exposed to external high energy light. A flashlamp where most possible of the emitting light is focused into the chrystal, the chrystal will absorb high energy photons, and "convert" these shorter wavelegths into the longer red spectrum wavelenth. The ruby is also placed between two parallell mirrors. See first section for explanation. Diode pumped laser (lets take the green 532nm laser): Also called Yag laser. A laser diode is focused into a chrystal that converts the 808nm laser diode light into 1064nm light (Not visible). This 1064nm light is then radiating another chrystal which is a non linear chrystal. When exposed to this 1064nm light, this chrystal will distort the wavelength by emitting a 2.nd harmonic distortion of the 1064nm light. A 2.nd harmonic distortion is a frequency which is the doubble of the main frequency. Therfor this chrystal will emit 532nm light. Polished ends of this chrystal will reflect the 532nm light to amplify it. Infrared radiation such as 808nm and 1064nm light is filtered to allow only the green 532nm light to pass through the laser apperture. These lasers is very efficient. Typically more than 50% of input energy is radiated as laser light.

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Q: How does a laser make light?
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Why laser light using in communication?

Laser Light is Make special Effect that will more Highlight comminity which in light and taking a good idea


Why laser beam is narrow straightwhere as light from tube light is blury?

A laser beam is a coherent light source that emits a narrow beam of light due to the alignment of its waves. In contrast, light from a tube light is incoherent and emits light in all directions, resulting in a blurry appearance. The difference in coherence and directionality between laser light and tube light accounts for their distinct characteristics.


Can a laser be made from a light bulb?

No. Laser light is coherent. Light bulb light is not.


Can you put a LED inside a laser housing to focus it into a beam just like a laser diode would?

No. Unless the LED is specifically a laser, you can not make it focus like a laser by putting it in a housing. A laser produces coherent light, which is why it acts like a beam. A normal LED is not coherent, and you can not make it so. Although you can not make a collimated incoherent light beam able to travel similar distances as a collimated laser beam, you can collimate incoherent light into a beam which would travel some distance with a small amount of divergence.


What dose laser stand for?

Light amplification by stimulated emission of radiation(LASER or laser)


Is a laser artificial sunlight?

No. Laser light is artificial light, but it is not sunlight.


Can a laser pointer make a rainbow with a prism?

A laser beam consists of a single frequency of light, therefore it cannot form a spectrum or rainbow.


What describes the light waves that make up laser light?

Laser light is made up of coherent and monochromatic light waves. Coherent means that all the light waves are in phase with each other, and monochromatic means that the light consists of a single color or wavelength. This allows laser light to be focused into a tight beam with high intensity and precision.


What does abbreviation LASER stand for?

LASER stands for Light Amplification by Stimulated Emission of Radiation.


How are the colors of the lights changed at a laser light show at the concert?

They are changed by a lens in the light machine, They have a white bulb and change the slides to pass through the tiny holes to make it seem as if it was a laser.


What do you call a strongly concentrated light?

A strongly concentrated light is called a laser.


What is a laser modulator used for?

A laser modulator is used to change modulate a beam of light (or laser). The easiest way that they modulate the laser, or light beam, is by changing the rate at which the laser is emitted from the source.