What are the advantages and disadvantages of fiber lasers

I. What are the characteristics of fiber lasers

1. The fiber laser is easy to realize continuous operation at low pump.

2. The fiber laser has a cylindrical structure, which is easy to couple with the fiber to realize various applications.

3. The radiation wavelength of the fiber laser is determined by the rare-earth dopant of the host material and is not controlled by the wavelength of the pump light. Therefore, a short-wavelength laser diode corresponding to the absorption spectrum of the rare-earth ion can be used as the pump source. Laser output in the infrared band.

4. Fiber lasers are compatible with current fiber devices, such as modulators, couplers, polarizers, etc., so they can be made into all-fiber systems.

5. The fiber laser has a simple structure, small size, simple and reliable operation and maintenance, and does not require complex equipment like the water-cooled structure in the semiconductor laser pumped solid-state laser system.

6. Compared with the lamp-pumped laser, the power consumption of the fiber laser is only about 1% of the lamp-pumped laser system, and the efficiency is more than 2 times that of the semiconductor laser-pumped solid Nd:YAG laser.

7. Because the optical fiber can only transmit the basic spatial mode, the beam quality of the fiber laser is not affected by the operation of the laser power, especially the high-power double-clad fiber laser has the advantages of high output power, large heat dissipation area and good beam quality and other advantages, the output laser has a beam quality close to the diffraction limit.

Second, what are the advantages and disadvantages of fiber lasers

1. Advantages of fiber lasers

As a representative of the third-generation laser technology, fiber lasers have the following advantages:

(1) The advantages of miniaturization and intensification brought by the low manufacturing cost of glass fiber, mature technology and the windability of the fiber.

(2) The glass fiber does not require 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 matrix.

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

(4) The output laser has many wavelengths: This is because the energy levels of rare earth ions are very rich and there are many types of rare earth ions.

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

(6) Since there is no optical lens in the resonant cavity of the fiber laser, it has the advantages of adjustment-free, maintenance-free and high stability, which is unmatched by traditional lasers.

(7) The fiber export makes the laser easily competent for various multi-dimensional and arbitrary space processing applications, making the design of the mechanical system very simple.

(8) Competent in harsh working environment, with high tolerance to dust, shock, shock, humidity and temperature.

(9) No need for thermoelectric cooling and water cooling, just simple air cooling.

(10) High electro-optical efficiency: The comprehensive electro-optical efficiency is as high as 20% or more, which greatly saves power consumption during work and saves operating costs.

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

2. Disadvantages of fiber lasers

(1) The cost of optical fiber is high.

(2) The fiber material is easily broken.

(3) Because the fiber core is very small. Compared with solid-state lasers, its single-pulse energy is very small.