1570nm single wavelength laser source Manufacturers

In communications, Four Wave Mixing (FWM) is a coupling effect between light waves caused by the third-order polarization real part of the fiber medium. It is caused by the interaction of two or three light waves of different wavelengths at other wavelengths. The production of so-called mixing products, or new light waves in the sidebands, is a parametric nonlinear process. The reason for the four-wave mixing is that the light at a certain wavelength of the incident light will change the refractive index of the optical fiber, and the phase of the light wave will be changed at different frequencies, resulting in a new wavelength.

This is a packaged chip with integrated circuits composed of tens or tens of billions of transistors inside. When we zoom in under a microscope, we can see that the interior is as complex as a city. The integrated circuit is a kind of miniature electronic device or component. Together with wiring and interconnection, fabricated on a small or several small semiconductor wafers or dielectric substrates to form structurally closely connected and internally related electronic circuits. Let’s take the most basic voltage divider circuit as an example to illustrate that it is How to realize and produce effect inside the chip.

The traditional laser uses the thermal accumulation of laser energy to melt and even volatilize the material in the active area. In the process, a large number of chips, micro-cracks and other processing defects will be generated, and the longer the laser lasts, the greater the damage to the material. The ultra-short pulse laser has an ultra-short interaction time with the material, and the single-pulse energy is super strong enough to ionize any material, realize non-hot-melt cold processing, and obtain the ultra-fine, low-damage processing advantages incomparable with long-pulse laser. At the same time, for the selection of materials, ultrafast lasers have wider applicability, which can be applied to metals, TBC coatings, composite materials, etc.

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