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Which laser of higher efficiency is?
With 450 W quasi-CW stacked laser diode bars pumping at 1064 nm, 236 W optimum output laser at 1064 nm was obtained. The optical-to-optical conversion efficiency was 52.5% and corresponding slope efficiency was 62%. This is up to now the highest slope-efficiency acquired in high power Nd:YAG ceramic laser.
What is laser efficiency?
The slope efficiency is an important property of a laser. It is obtained by plotting the laser output power against the input pump power. Above the lasing threshold, the resulting curve is usually close to a straight line. The slope efficiency is the slope of this line.
What is laser output power?
The output power of a laser pointer is usually stated in milliwatts (mW). Visible laser pointers (400–700 nm) operating at less than 1 mW power are Class 2 or II, and visible laser pointers operating with 1–5 mW power are Class 3A or IIIa.
Which laser has high efficiency of optical pumping is used?
Another source for optical pumping is the semiconductor diode laser. These lasers are especially useful for pumping solid state lasers, like Nd:YAG. Compared with flashlamps, diode lasers offer a better match of the output spectrum to the absorption of the material.
Are lasers efficient?
The electrical-to-optical conversion efficiency of modern laser technology can be as high as 85%, and off-the-shelf semiconductor diode lasers can have an output efficiency of around 50%.
What is the efficiency of ruby laser?
The efficiencies computed vary from 9·9 to 23·7 per cent in the green band for rod diameters of 0·3–1·3 cm. For the same diameter range the efficiencies in the ultraviolet band are 5·9- 11·6 per cent. Once the theoretical efficiency of the rod is known the overall efficiency of the laser can be determined easily.
Why is co2 used in lasers?
Carbon dioxide lasers can precisely remove thin layers of skin with minimal damage to the surrounding structures. These lasers treat sun damage, wrinkles, scars, warts, birthmarks and other skin conditions.
How efficient is a differential?
Differential efficiency The efficiency of a ball-bearing is around 0.99 and of a spiral bevel gear mesh around 0.96 . With these numbers, we can calculate the overall efficiency of the differential. In reality the efficiency of the differential is not constant but it depends on the temperature and shaft speed.
What is the efficiency curve of a laser?
Figure E13 shows the efficiency curve of the laser: the output power as a function of the pump power. According to the preceding formula, the curve is actually linear with a slope that depends on two parameters:
How is the output power of a laser determined?
The part of the beam passing through the output mirror compared to the total losses of the cavity: to maximise the output power, these losses must be minimised. The ratio of the pump wavelength to the laser wavelength. This value is specific to each laser system and for this one is equal to 0.76
What is the ratio of the pump wavelength to the wavelength of a laser?
The ratio of the pump wavelength to the laser wavelength. This value is specific to each laser system and for this one is equal to 0.76 The slope of this line is often called the laser efficiency and in this case is equal to 63%.