A laser that uses a doped fiber as a gain medium, or a laser whose laser resonator is mostly composed of fiber.
The grating coupler uses grating technology to couple optical signals into optical fibers, and uses the principle of grating diffraction to connect the transmitted optical signals with the optical field inside the optical fiber. The fundamental principle is to use high-frequency acoustic wave fields as gratings to divide light waves into many small light waves, and project them into optical fibers, thereby realizing the coupling and transmission and reception of optical signals.
Fiber Bragg gratings are optical components with a periodic structure that separate light into beams that propagate in predictable directions based on wavelength. Gratings serve as the core dispersive element of many modern spectroscopic instruments. They provide the critical function of selecting the wavelength of light required to perform the analysis at hand. Selecting the best grating for an application is not difficult, but it usually requires a degree of decision making when prioritizing the key parameters of the application.
Thermistors are mainly used for temperature monitoring, overheating protection, etc. It is a temperature-sensitive semiconductor resistor whose resistance changes significantly with changes in temperature. It uses the heat-sensitive effect of semiconductor materials to measure and control temperature, and is widely used in various electronic devices and systems. Thermistors have the advantages of small size, fast response speed, and high measurement accuracy. Therefore, they have been widely used in temperature measurement, temperature control, overcurrent protection and other fields. Text symbols are generally represented by "RT".
The wavelength of a laser describes the spatial frequency of the emitted light wave. The optimal wavelength for a specific use case depends heavily on the application. During material processing, different materials will have unique wavelength absorption characteristics, resulting in different interactions with the materials. Likewise, atmospheric absorption and interference can affect certain wavelengths differently in remote sensing, and in medical laser applications, different skin colors will absorb certain wavelengths differently. Shorter wavelength lasers and laser optics have advantages in creating small, precise features that generate minimal peripheral heating due to smaller focused spots. However, they are generally more expensive and more susceptible to damage than longer-wavelength lasers.
Stimulated Brillouin Scattering is the parametric interaction between pump light, Stokes waves and acoustic waves. It can be regarded as the annihilation of a pump photon, producing a Stokes photon and an acoustic phonon simultaneously.
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