Jumpers are cables directly connected to desktop computers or equipment to facilitate the connection and management of equipment. Jumpers have a thick protective layer and are often used between terminal boxes and optical terminals. Only one end of the tail fiber has a connector, and the other end is an optical fiber connector.

Infrared absorption spectrum is also a kind of molecular absorption spectrum. when the sample is irradiated by infrared light with continuously changing frequency, the molecules absorb some frequencies of radiation, and its vibration or rotation motion causes the net change of dipole moment, resulting in the transition of molecular vibration and rotation energy level from the ground state to the excited state, which weakens the transmitted light intensity corresponding to these absorption regions.

Infrared is the abbreviation of infrared ray. It is an electromagnetic wave with a wavelength of about 3.3 μ m. The laser amplifies the generated radiation by stimulated light emitted at 1.65um.

Laser modulation is the process of using laser as carrier wave for modulation. Laser has excellent temporal coherence and spatial coherence. It is similar to radio wave, easy to modulate, and the frequency of light wave is very high, and the capacity of transmitting information is very large.

DPSS laser is the diode pump solid state laser, excitation source for the semiconductor laser diode (module), laser module stimulated medium for special optical crystal solid materials, general for the rare earth doped crystals or other metal ions of YAG, YVO4 and GGG, is infrared wavelength range, generally is a common single wavelength.

The red laser pointer is easier to make, because there is a laser diode that generates this wavelength, so its structure is the simplest, basically just a diode powered by a battery. Wavelength is about 600 nanometers, there are mature technology, there are mature semiconductor process materials.

all solid-state blue laser light source is expected to be widely used in many fields, such as digital to analog converter, laser and brush technology, laser medicine, biochemical technology, material science and optical communication.

Visible light is the part of the electromagnetic spectrum that human eyes can see and feel. In this range, electromagnetic radiation is called visible light, or simply light. The wavelength range that human eyes can feel is generally 390nm - 700nm.

According to the analysis of laser generation principle, laser is under the action of "excitation source", the number of high level electrons of atoms increases, and after staying for a very short time, they jump to low level and emit laser at the same time.It is not hard to see that there must be many, many atoms of matter that can emit laser light under the action of "excitation source".

As metal processing technology continues to advance and user requirements continue to increase, lasers need to innovate in terms of cost and energy efficiency as well as laser system performance.For non-ferrous metals, the absorption of light energy increases with the decrease of light wave length.For example, the light absorption of copper at the wavelength below 500nm will increase by more than 50% than infrared light, so blue semiconductor laser is more suitable for the processing of copper.