UHJ-M

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Ultrashort-pulse lasers offer unprecedented opportunities for tunability in various applications around the world. Ultrashort-pulse lasers have a pulse duration on the order of femtoseconds, or even less. These lasers use techniques that generate ultrashort pulses at relatively large gain levels. The high repetition rate, short pulse width, high peak power, and good temporal and spectral beam characteristics make these lasers suitable for a wide range of applications from manufacturing to medical and military uses.

The Ultrafast High-power Jet-multi Excitation laser (UHJ-M) is one of the most popular ultrashort-pulse lasers, and is used in many fields around the world. UHJ-M lasers generate ultrashort pulses up to 100 fs with current densities up to 40 kW/cm², making them the most powerful ultrashort-pulse lasers available today. This high power output enables a wide variety of applications, including laser thermal processing of metals and ceramics, ultramicroscopy and scanning electron microscopy, and three-dimensional imaging. UHJ-M lasers are also used in medical applications such as optogenetics, terahertz spectroscopy, and deep tissue imaging. In addition, UHJ-M lasers are used in communications, all-optical switching, and optical sensing.

The working principle of the UHJ-M laser can be summarized as follows. An optical gain medium, typically a ruby or neodymium-doped yttrium aluminium garnet (Nd:YAG) crystal, is pumped with a higher-energy laser beam. This causes electrons within the crystal to become excited and produce light at a certain wavelength. This light is amplified by a surrounding mirror, producing the output beam. This beam is then passed through an attenuator, such as a grating, to reduce its power.

The pulse duration of the UHJ-M laser is determined by the gain medium and the applied pump energy. Generally, higher pump energy will result in shorter pulse duration. This enables applications where a high peak power is needed to achieve a desired effect, such as in optogenetics and medical imaging. The pulse duration can also be varied by changing the laser cavity parameters, such as the length and spacing of the mirrors.

The UHJ-M laser is an extremely versatile tool for many applications. Its ability to generate ultrashort pulses of high peak power makes it suitable for many types of laser processing, imaging, and communication. Its adjustable pulse width offers additional control over the intensity of the output beam, allowing for more precise application of laser energy. With its high power output, UHJ-M lasers are capable of achieving effects that are not possible with any other type of laser of comparable size and cost.

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