Laser source of laser
Spectral resolution represents the relationship between bandwidth (in nanometers) and wavelength: R = λ/Δλ. If it is a spectrometer or more generally a spectrum, it is a measure of the laser's ability to distinguish features of the electromagnetic spectrum. If you want to calculate the megahertz (MHz) bandwidth from the nanometer (nm) value, you can use the Δν=Δλ* c /λ2 formula or Internet calculations. Wavelength can even be converted into wavenumber (cm-1) and the other four bandwidth units. Some sensors used to detect laser signals use interference filters to block interfering ambient light. Therefore, the wavelength of the laser source must be kept within the small transmission range of the filter. For suppliers, this is important information-but in our example, the limited center wavelength tolerance can be ignored. A green laser pointer that uses a solid laser material as a working substance. In 1960, the ruby laser invented by T.H. Mailman was a solid-state laser and the first laser in the world.
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Lidar has the advantages of high accuracy, fast operation speed and high efficiency, and is widely used in the fields of auto-driving cars, robot positioning and navigation, spatial environment surveying and mapping, security and protection. LiDAR is a radar system that emits laser beams to detect target position, speed and other characteristic quantities. It has the advantages of high measurement accuracy and good directionality. It has a wide range of applications in the military and civilian geographic surveying and mapping fields. If the excited substance is placed in the resonant cavity, the light radiation reflects back and forth along the axis in the resonant cavity, passes through the substance many times, and the light radiation is magnified many times to form a beam "laser" with high intensity and concentrated direction. This is the laser oscillator.The brightness of a laser source is a measure of its output power and beam quality. Essentially, it is the high power laser pointer power divided by the BPP. Therefore, its unit is W/cm2, and for clarity, the laser diode is at the edge emitter. Other common laser types, including vertical cavity surface emitting lasers (VCSEL), strip/stack, array or quantum cascade lasers (QCL), are not in our discussion due to their obvious deviations. However, similar methods can be used to evaluate each series to narrow the scope of application.
2022-01-06 11:43:01
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