Comparison of Diode Pumped Laser and Lamp Pumped Laser

Semiconductor and lamp-pumped lasers use ND:YAG (neodymium-doped yttrium aluminum garnet) crystal as the material for laser generation. It can convert 808nm visible light into 1064nm invisible laser, but the output laser is different. A key factor is the pump source that makes the crystal rod output laser. Semiconductor pump uses semiconductor diodes to emit 808nm light waves; while lamp pump uses light emitted from krypton lamps to pump, but the light emitted by krypton lamps has a wider spectrum. , But there is a slightly larger peak at 808nm, and the light of other wavelengths finally becomes useless heat and dissipates. Therefore, the conversion efficiency of diode-pumped lasers is much higher than that of lamp pumping. The advantages are as follows:

First, maintenance-free, no need to change the krypton lamp

To replace the krypton lamp, especially For metal marking, the energy required is larger, and the life of the krypton lamp is more affected. The life of the semiconductor diode is long. Its rated working time is greater than 10,000 hours, while the life of the krypton lamp is only a few hundred hours, so the lamp is pumped After the laser has been working for a period of time, the krypton lamp needs to be replaced. 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.

Second, power saving

Due to the high conversion efficiency of the semiconductor pump and the good mode, it is easier to focus a small area of u200bu200bhigh-energy light spot. When marking the same object, the The smaller the external energy required. At the same time, the waste heat generated by it is much smaller than that of lamp-pumped lasers, which determines that it does not need a huge cooling system like lamp-pumped lasers. Therefore, the power consumption of a diode-pumped laser system is much smaller than that of a lamp pump.

3. Better marking effect

Since semiconductor diodes emit almost only one wavelength of light, the laser produced by the semiconductor pump has better color characteristics and better laser modes. Good, a good laser mode will make the laser spot smaller, more concentrated energy, and better marking effect.

Four. Small size

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

Semiconductor pumped lasers generate less waste heat and require a small cooling system. Generally, only a one-horse chiller is required. Lamp-pumped lasers generally require a chiller of more than 2 horses and a larger Water pump to provide a larger 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.