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Comparison of Diode Pumped Laser and Lamp Pumped Laser

Categories:Industry News
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Time of issue:2021-03-16 13:49

(Summary description)Both semiconductor and lamp pumped lasers use ND:YAG (neodymium-doped yttrium aluminum garnet) crystal as the material for laser generation.

Comparison of Diode Pumped Laser and Lamp Pumped Laser

(Summary description)Both semiconductor and lamp pumped lasers use ND:YAG (neodymium-doped yttrium aluminum garnet) crystal as the material for laser generation.

Categories:Industry News
Author:
Origin:
Time of issue:2021-03-16 13:49

Information

Both semiconductor and lamp pumped lasers use ND:YAG (neodymium-doped yttrium aluminum garnet) crystal as the material for laser generation. It can convert visible light at 808nm into invisible laser light at 1064nm, but is another key factor for laser output It is the pump source that makes the crystal rod output laser. Semiconductor pump uses semiconductor diode to emit 808nm light wave; while lamp pump uses the light emitted by krypton lamp to pump, but the light emitted by krypton lamp has a wider spectrum, which is only There is a slightly larger peak at 808nm, and the light of other wavelengths will become useless afterwards and dissipate heat. Therefore, the conversion efficiency of semiconductor-pumped lasers is much higher than that of lamp-pumped lasers. The advantages are as follows:

1. Maintenance-free without changing the krypton lamp

To replace the krypton lamp, especially for metal marking, the energy required is large, and the life of the krypton lamp is more affected. The life of the semiconductor diode is long. Its rated working time is more than 10,000 hours, while the life of the krypton lamp is only a few hundred. Therefore, the krypton lamp needs to be replaced after the lamp-pumped laser has been working for a period of time. Therefore, semiconductor pump lasers are also called maintenance-free lasers, which means that they work without consumables and do not require maintenance for a long time.

The lamp-pumped laser marking machine needs to shut down frequently to replace the krypton lamp, which is intolerable for many large production lines. Due to the different life spans of krypton lamps, it is possible that the use of krypton lamps will be more wasteful due to the uneven quality of domestic lamps. Therefore, switching to a semiconductor marking machine can greatly save the loss of manpower and material resources caused by downtime maintenance.

2. Power saving

Due to the high conversion efficiency and good mode of the semiconductor pump, it is easier to focus a small area of light spot with high energy. When marking the same object, the external energy required is smaller. At the same time, the waste heat generated by it is much smaller than that of the lamp-pumped laser, which determines that it does not need a huge cooling system like the lamp-pumped laser. Therefore, the power consumption of a semiconductor pumped laser system is much smaller than that of a lamp pump.

Three, the marking effect is very good

Since semiconductor diodes almost only emit light of one wavelength, the monochromaticity of the laser produced by the semiconductor pump is very good, and the laser mode is better. A good laser mode will make the laser spot smaller and more energy. Concentration to achieve a good marking effect.

Four, small size

The volume of the diode laser module itself is small and exquisite, and its laser mode is good, so the volume of the diode pumped laser is nearly one-third smaller than that of the lamp pumped laser.

Diode-pumped lasers generate less waste heat and require a small cooling system. Generally, only a one-horse chiller is needed. Lamp-pumped lasers generally require a chiller of more than 2 horses. At the same time, a larger water pump is required to provide greater cooling. Water flow. Therefore, the noise of the lamp-pumped laser marking machine is louder, and the huge cold water opportunity generates more heat, especially in the southern summer when the ambient temperature is higher. This excess heat will make the worker’s working environment worse or require more The air-conditioning system adjusts the temperature of the working environment, which increases the production cost.

Previous: Facing challenges and looking to the future: high-quality development becomes the core

Next: Analyze the status quo and working principle of semiconductors

Previous: Facing challenges and looking to the future: high-quality development becomes the core

Next: Analyze the status quo and working principle of semiconductors

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