Fiber Laser Generator

Fiber laser generator is a laser that uses optical fiber as the gain medium. It uses doped materials (such as erbium-doped or ytterbium-doped) to amplify and excite light in the optical fiber to produce high-quality laser output. Compared with traditional solid-state and gas lasers, fiber laser generators generally have higher optical efficiency, better beam quality, and smaller size. This laser can operate in multiple wavelength ranges and provide continuous wave or pulsed laser output. It is widely used in laser cutting, welding, marking, medical treatment, scientific research and other fields.

The origin of fiber laser technology can be traced back to the 1960s. With the rapid development of fiber optic communication technology, fiber lasers gradually took shape in the 1980s. Due to its superiority in transmission loss, stability and safety, fiber lasers have received more and more attention. With the continuous advancement of doped fiber materials and laser technology, fiber laser generators have achieved significant improvements in power, efficiency, and laser wavelength, making them important in many application fields such as industrial manufacturing, medical care, and scientific research. competitiveness. Today, fiber laser technology has become an important direction in the development of laser technology and has been widely used and recognized in the market.

A. Basic Construction

Laser Gain Medium

The core of a fiber laser generator is the gain medium, which is usually an optical fiber doped with rare earth elements (such as erbium, ytterbium, neodymium, etc.). These doped materials are responsible for generating laser light under the excitation of a pump source. Doped optical fibers increase the laser intensity by interacting with the pump light.

Laser Cavity

The laser cavity is an important part of laser formation, which is usually achieved by placing fiber gratings or reflectors at both ends of the optical fiber to form a resonant cavity. Light is reflected in this cavity, thereby enhancing the laser amplification process and ensuring that light of a specific wavelength can effectively oscillate in the cavity.

Types of Fibers

Single-mode fiber: Single-mode fiber allows only one mode of light to propagate, and is usually used in applications that require high beam quality and long-distance transmission. Due to its small core diameter, it can effectively reduce inter-mode interference and improve the propagation efficiency of light.

Multimode fiber: Multimode fiber allows multiple modes of light to propagate simultaneously, and has a larger core diameter, which is suitable for short-distance and high-power applications. Its main advantage is that it can transmit more energy, but the beam quality is relatively low.

B. Excitation process

Pump source (such as laser diode)

The pump source is the energy input of the fiber laser, usually a laser diode. The light emitted by these diodes is coupled into the optical fiber, exciting the gain medium in the fiber, causing the electrons in it to rise to an excited state.

Optical gain of optical fiber

When the gain medium in the optical fiber is excited by the pump light, the electrons in it undergo a radiative transition, returning from the excited state to the ground state, while releasing photons. These photons interact with the pump light, further triggering the excitation of more electrons, forming light gain. As the light is reflected and amplified multiple times in the optical fiber, the laser is finally generated.

C. Laser output mode

Continuous wave (CW)

The continuous wave output mode means that the laser continuously produces a stable laser beam. This mode is usually used in applications that require a long-lasting laser supply, such as laser cutting, welding, and medical treatment. Continuous wave lasers have high power and are suitable for large-scale industrial applications.

Pulse output

The pulse output mode means that the laser generates short-term high-energy laser pulses at specific time intervals. Pulse output can achieve high peak power and is suitable for applications that require precise control of energy and time, such as dynamic operations such as laser marking, material processing, and scientific experiments.

Fiber laser generators use specially designed gain media and laser cavity structures to generate efficient and high-quality laser output through pump source excitation. Different fiber types and laser output methods make it have a wide range of application potential in many fields.

1. High efficiency: Fiber lasers have high energy conversion efficiency, usually reaching 30% to more than 50%, which makes them more energy-efficient than other types of lasers (such as solid or gas lasers).

2. Compact design: Fiber lasers are usually compact in design, easy to integrate and move. This makes them particularly important in space-constrained applications, such as in industrial and medical equipment.

3. Good beam quality: Single-mode fiber lasers are able to output high-quality laser beams with good diffraction limits, which is very useful in high-precision applications such as laser cutting, welding, and medical irradiation.

4. Low maintenance cost: Fiber lasers have a simple structure and almost no mechanical parts that need to be maintained (such as mirrors or optical elements), reducing the cost of long-term maintenance and operation.

5. Energy output stability: Fiber lasers perform well in output energy, with high stability and stable output power, and are suitable for occasions where continuous output is required.

6. Wide frequency range: Fiber lasers can easily adjust wavelength and frequency, suitable for a variety of different materials and processing requirements.

7. Strong anti-interference ability: Fiber lasers can work normally in harsh environments and have high resistance to vibration, shock and temperature changes.

8. Applicable to multiple working modes: Fiber lasers can work in continuous wave (CW) or pulse mode as needed to adapt to different industrial applications, such as cutting, welding, engraving, etc.

9. High safety: The beam of the fiber laser is guided inside the optical fiber, which reduces the chance of the laser being exposed to the air, thereby reducing the risk of reflection and scattering and improving operational safety.

10. Environmental protection: Fiber lasers usually generate relatively less waste heat and noise during operation, which meets modern environmental protection standards and sustainable development concepts.

Fiber laser generators have been widely used in many fields such as laser processing, medical treatment, and scientific research due to their high efficiency, compactness, stability and versatility.

During the use of the laser, maintenance and support are important aspects to ensure the efficient operation of the equipment and extend its service life.

A. Daily maintenance and precautions

1. Cleaning

Optical component cleaning: Regularly check and clean the optical components of the laser (such as lenses and mirrors) to avoid dirt, dust or smoke affecting the laser quality. Use special optical cleaners and non-woven cloth to clean and avoid scratches.

Radiator and fan: Check whether the radiator and fan are clogged with dust, and clean them regularly to maintain good heat dissipation performance.

2. Temperature and humidity control

Operating environment: Ensure that the laser operates under appropriate temperature and humidity conditions. Too high or too low temperature, as well as too high humidity, will affect the performance and reliability of the equipment.

Ventilation: Maintain good ventilation to avoid overheating inside the laser.

3. Mechanical component inspection

Moving parts: Regularly check the mechanical parts of the laser (such as guide rails, moving axes, etc.) to ensure that they are well lubricated and not worn.

Fastener inspection: Check all connectors and fasteners to ensure that they remain tight to prevent loosening or falling off.

4. Software Update

Firmware Upgrade: Check regularly whether the manufacturer provides software or firmware updates, and update them in time for better performance and safety.

5. Safety Check

Safety Protection Equipment: Check the laser's safety protection equipment (such as laser protection cover and alarm system) regularly to ensure that it is functioning properly and protects the safety of operators.

B. Warranty and After-Sales Service

1. Warranty Policy

Warranty Period: A limited warranty is provided, usually 1 to 3 years, depending on the product line. During the warranty period, if the device fails due to defects in materials or workmanship, the manufacturer will usually provide free repair or replacement service.

Warranty Coverage: The warranty usually only covers the failure of original parts and materials, and does not include damage caused by misuse, abuse, failure to follow instructions or natural disasters.

2. After-Sales Service Options

Technical Support: Provide technical support services, including telephone support, online chat and email support, to help users solve technical problems.

On-site Service: In some cases, the manufacturer may provide on-site maintenance services, and technicians will go to the user's site to inspect and repair the equipment.

Training and consulting: We also provide equipment operation training and consulting services to help users better master the use skills and maintenance methods of the equipment.

Through regular maintenance and attention to operating details, the performance and service life of the laser can be significantly improved. In addition, understanding the manufacturer's warranty policy and after-sales service options will help you get support quickly when there is a problem with the equipment and reduce downtime. When purchasing a laser, users can clearly communicate with the manufacturer about the relevant maintenance and support content to ensure smooth and efficient use of the equipment.