Applications and Description of Fiber-Coupled Semiconductor Lasers

           The Fiber-Coupled Semiconductor Laser (FCSL) is a type of laser that transmits signals and energy through optical fibers. It offers several advantages, including compact size, high power output, excellent wavelength tunability, and ease of control. FCSLs are widely utilized in various applications, such as laser marking, laser cutting, laser welding, and medical procedures.

           The working principle of the Fiber Coupled Semiconductor Laser (FCSL) involves using optical fiber to transmit the optical signal generated by the semiconductor laser to a fiber coupler. The fiber coupler then converts the optical signal into an electrical signal, which ultimately drives the semiconductor laser. Because fiber couplers can isolate optical signals of different frequencies, the FCSL can achieve high-speed tuning and precise adjustment of output wavelengths.

          The main components of FCSL include semiconductor lasers, fiber couplers, fiber transmission systems, and electronic control systems. Among these, the semiconductor laser is the core component of FCSL, and its type and power significantly influence both the output wavelength and output power.

Fiber-coupled semiconductor lasers offer several advantages:

    1.The intensity curve of the outgoing light in the fiber is typically smooth and circular, exhibiting symmetrical beam quality, which is highly advantageous in practical applications. For instance, a less complex optical device can be employed to generate circular pumping spots for end-pumped solid-state lasers.

2.If the laser diode and its cooling device are removed from the solid-state laser head, the laser becomes more compact, creating sufficient space for additional optical components.

3.The replacement of unqualified optically coupled semiconductor lasers does not necessitate altering the device's configuration.

4.The optical coupling device is user-friendly and can be easily integrated with other fiber optic systems.

         Songsheng photoelectric direct semiconductor laser system utilizes a 915 nm semiconductor laser, which features a fiber coupler and an external pluggable fiber. It offers two types of semiconductor laser options based on different power levels: air cooling (10W, 40W, 60W, 100W) and water cooling (200W, 500W). The system boasts a response speed of 15 μs, which is faster than the market standard of 20 μs, and it operates with an internal closed-loop control that requires no human intervention. This system is primarily used for laser soldering, surface heat treatment, and as a high-power semiconductor laser pump source for cladding. Its main advantages include: precise temperature control during laser processing; a PID algorithm that minimizes the risk of burning solder joints; self-tuning control with a built-in welding model; internal circulation water cooling; and online real-time power detection. It is particularly well-suited for applications in low-temperature welding. Reason: Improved clarity, technical accuracy, and vocabulary while maintaining the original meaning.

        With the continuous advancement of technology, the size of Fiber Coupled Solid Lasers (FCSL) is decreasing, while their power output is increasing, leading to a broader range of applications. For instance, in the field of laser marking, FCSL can deliver high-speed and precise marking results. In laser cutting, FCSL enables efficient and accurate cutting outcomes. In laser welding, FCSL provides high precision and stability in welding operations. In the medical field, FCSL facilitates fine and efficient surgical procedures.

        In summary, FCSL, as an efficient, precise, and compact laser, has a broad range of potential applications in industrial production, scientific research, and other fields.