Fiber Laser Frequency Conversion System: Expanding New Frontiers
The main function of the fiber laser frequency conversion system is to use nonlinear frequency conversion technology to convert the near-infrared band laser into a mid-infrared band laser. The mid-infrared band laser has very important applications in many fields, including remote free-space optical communications, environmental monitoring, and medical diagnostics. In addition, mid-infrared lasers also have important applications in military applications, mainly focusing on Imaging laser radar and laser directional infrared interference.
However, the common solid-state laser operating wavelengths are concentrated in the near-infrared waveband, and mid-infrared laser media must be developed or nonlinear frequency conversion techniques must be used to convert the laser's operating wavelength to the desired range. The early mid-infrared lasers based on non-linear frequency conversion technology all use traditional solid-state lasers as the pumping source. They are generally accompanied by large volumes, are easily affected by external vibration, temperature changes, and other factors. They have poor stability, are difficult to maintain, and have high maintenance costs.
Compared with traditional solid-state lasers, fiber lasers have many advantages such as good beam quality, flexible and controllable spectrum, high conversion efficiency, compact size, and easy thermal management. Mid-infrared optical parametric oscillators realized by fiber laser pumping have parametric conversion. It has many advantages such as high efficiency, high stability, easy tuning, compact structure, and high integration.
In order to realize the conversion of near-infrared to mid-infrared lasers, people have developed a special science-frequency conversion technique to transform the laser's operating wavelength to the desired range. The wavelength of the traditional solid-state laser is determined by its own energy level structure, and generally it is fixed, but the frequency conversion technology, especially the optical parametric oscillation technology therein, is determined by artificially customized nonlinear crystals. , as long as you change a little bit of detail, you can achieve a great transformation, making the wavelength of the laser out of a myriad of possibilities, but also can change to the previously unachievable band.
To realize high-power fiber-optic variable-frequency mid-infrared lasers, it is necessary to overcome the effects of various unfavorable factors such as polarization instability, self-pulse, fiber nonlinear effects, parametric inverse conversion effects, and parasitic oscillation effects in fiber lasers, and to break through a series of Science problems.
Compared with traditional space solid-state lasers, using fiber lasers as variable-frequency light sources has many advantages as follows:
(1) Flexible structure: no change due to vibration or temperature change, light weight, flexible structure, easy to carry, and can meet the needs of different occasions;
(2) The band is flexible: the working range of the fiber laser is far more than that of the solid-state laser, and the spectrum can be customized, the energy can be concentrated on one or more lines, and the spectral shape and envelope can be flexibly controlled;
(3) Flexible switching: Fiber laser devices have a high degree of integration and are easy to implement frequency, polarization, and phase adjustment control to achieve different functions;
(4) Continuous wave operation mode: The use of continuous wave fiber laser as the pump source can increase the service life of the system and achieve stable power in the mid-infrared laser transmission.
15W/40W/50W 808nm Fiber Coupled Diode Laser with PSU and Detachable/Inseparable 1.5m Fiber
For:Fiber laser pumping source;Industry;Scientific researches
