General introduction:
The 405nm single-mode violet laser diode is a semiconductor device that can emit violet laser light source with a wavelength of 405nm. It is based on the principle of the photoelectric effect of semiconductors. By injecting electric current into a specific semiconductor material, electrons and holes recombine and radiate photons, thereby generating lasers. Its single-mode characteristics ensure that the laser propagates in a specific mode and has unique optical properties.
Performance advantages:
Wavelength: short wavelength of 405nm is in the violet region of visible light and has a shorter wavelength. This makes it perform well in some applications that require high resolution, such as in Blu-ray disc reading, where a short wavelength can achieve a smaller spot size, thereby improving data storage density and reading accuracy.
High energy density: Due to the short wavelength, the photon energy of 405nm violet light is relatively high. This gives the 405nm single-mode laser diode an advantage in some applications that require high energy density, such as laser engraving, micromachining, etc., where materials can be processed and handled more efficiently.
Good monochromaticity: The characteristics of single-mode laser diodes make the violet lasers they emit have excellent monochromaticity, and the wavelength width is usually very narrow, generally within a few nanometers. This means that the violet laser light it emits has high color purity, and in applications that require specific wavelengths of light, such as fluorescence excitation, optical detection etc. It can provide accurate and stable violet laser light sources and reduce interference from other wavelengths of light.
High directivity: The beam emitted by the 405nm SM laser diode is highly directional, with a small divergence angle, usually within a few milliradians. This good directivity enables the violet laser beam to maintain high intensity and focus during long-distance transmission, which is conducive to improving the transmission efficiency of optical signals and the accuracy in various applications, such as laser indication, optical communication, etc.
Low threshold current: This type of 405nm SM violet laser diode usually has a lower threshold current, that is, laser emission can be achieved at a lower driving current. This not only reduces power consumption and improves energy efficiency, but also helps to extend the service life of the device and reduce operating costs. It is of great significance in some equipment and systems with strict requirements on power consumption.
Good stability: 405nm single mode laser diode has good power stability and wavelength stability. Within a certain range of working conditions, it can keep the output power and wavelength relatively constant, and is less affected by environmental factors (such as temperature, current fluctuations, etc.). This allows it to work reliably in a variety of complex working environments and is suitable for application scenarios that require high light source stability, such as scientific research, medical equipment, etc.
