What Is A Fiber Lasers?

Fiber Lasers, as a representative of the third generation laser technology, has the following advantages:

(1) The advantages of miniaturization and intensification brought by low manufacturing cost, mature technology, and fiber winding;

(2) The glass fiber does not need the strict phase matching of the incident pump light like the crystal, which is due to the wide absorption band caused by the non-uniform broadening caused by the Stark splitting of the glass substrate.

(3) The glass material has a very low volume area ratio, fast heat dissipation, and low loss, so the conversion efficiency is high, low laser threshold;

(4) The output laser wavelength: this is because rare earth ion levels are very rich and rare earth ion types;

(5) Tunability: due to the wide level of rare earth ions and the wide fluorescence spectrum of glass fiber.

(6) Because there is no optical lens in the resonator of the fiber laser, it has the advantages of no adjustment, no maintenance, and high stability, which is incomparable to the traditional laser.

(7) Fiber export, so that the laser can easily be competent for a variety of multidimensional arbitrary space processing applications so that the design of mechanical system becomes very simple.

(8) Competent in harsh working environments, dust, shock, impact, humidity, and temperature and has a high tolerance.

(9) Do not need thermoelectric refrigeration and water cooling, just simple air cooling.

(10) High electro-optic efficiency: the comprehensive electro-optic efficiency is up to more than 20%, which can greatly save power consumption during work and save operation costs.

(11) High-power, commercial fiber lasers are six kilowatts.

Where are Fiber Lasers used?

1. Marking Application

Pulsed fiber laser with its excellent beam quality, reliability, longest maintenance-free time, highest overall electro-optical conversion efficiency, pulse repetition frequency, smallest volume, without water cooling the simplest, the most flexible way to use, the lowest operating costs make it become the only choice in high speed, high precision laser marking.

A fiber laser marking system may consist of one or two fiber lasers with a power of 25W, one or two scanning heads used to direct light to the workpiece, and an industrial computer that controls the scanning heads. This design is more than four times more efficient than using a single 50W laser beam splitting into two scanning heads. The maximum marking range of the system is 175mm*295mm, the spot size is 35um, and the absolute positioning accuracy is +/-100um in the full marking range. The focus spot can be as small as 15um at a 100um working distance.

2. Application of Material Handling

The material treatment of fiber lasers is based on a heat treatment process in which the parts of the material that absorb laser energy are heated. The laser energy with a wavelength of about 1um is easily absorbed by metal, plastic, and ceramic materials.

3. Application of Material Bending

Fiber laser forming or bending is a technique used to change the curvature of metal plates or hard ceramics. Concentrated heating and rapid self-cooling cutting result in plastic deformation in the laser-heated area, permanently changing the curvature of the target workpiece. The study found that the laser processing of micro-bending has much higher precision than other methods, and it is an ideal method in microelectronics manufacturing.

4. Application of Laser Cutting

With the increasing power of fiber laser, fiber laser can be used in industrial cutting. For example, a fast chopper continuous fiber laser is used to micro-cut stainless steel arterial tubes. Because of their high beam quality, fiber lasers that can obtain very small focusing diameters and the resulting small slit widths are refreshing the standards in the medical device industry.

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