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A crystal commonly utilized in lasers

Frequency multiplier crystal

Regularity-increasing crystal is a type of nonlinear optical crystal made use of for frequency doubling impact.


(1) Without main balance;

(2) High openness of basic as well as double frequency waves;

(3) The square nonlinear electrical polarization coefficient is big because the regularity increasing conversion efficiency is symmetrical to the square of this coefficient;

(4) Partial matching ability, specifically non-critical matching capability. Phase matching Angle and also temperature resistance should remain in;

(5) Good optical harmony, high damage threshold;

(6) Steady physical and chemical residential or commercial properties; The growth process is fairly easy to acquire crystals big sufficient to get to useful lengths in the setting matching instructions.

BBO crystal

BBO crystal is a kind of nonlinear optical crystal with apparent detailed benefits as well as excellent performance. It has an exceptionally broad light transmittance range, an incredibly reduced absorption coefficient, and weak piezoelectric ring impact. Compared to other electro-optic modulated crystals, BBO crystal has a greater termination ratio, a bigger stage sustaining duty, a higher anti-light damage threshold, broadband temperature matching, and superb optical uniformity. It is beneficial to improve the stability of laser outcome power, specifically for the three-way regularity Nd: YAG laser has a variety of applications.

Main uses of BBO crystal:

(1) Made Use Of 1064nm Nd: YAG laser with a double, three-way, quadruple, and fivefold frequency.

(2) Used in color and titanium treasure laser of dual frequency, triple regularity, amount regularity, distinction frequency, and so on.

(3) For optical parametric oscillation, amplifier, and so on.

BBO switch: The electro-optical Q button made of BBO switch is frequently used in high repetition frequency, high power electro-optical Q-switched laser, all-solid picosecond, femtosecond regrowth amplification system.

As a result, the turn-off time of the electro-optic Q button is much shorter than the optical break time of acousto-optic Q button. As a result, the all-solid-state short-cavity Q-switched laser using the BBO electro-optic Q button can create a high-energy laser with a pulse size of less than 4ns, the preferred light source for electro-optic inner sculpting maker. BBO electro-optical Q button can be switched off and withstand up to 150W oscillating optical power in the tooth cavity (laser output power approximately 50W) without water air conditioning.

2. Q-switched crystal

Q-tuning can be separated into active Q-tuning and passive Q-tuning. In contrast, active Q-tuning can be separated right into acousto-optical Q-tuning and electro-optical Q-tuning.
Generally utilized passive Q-regulating crystals include co: spinel, Cr: YAG, Cr: GSGG, V: YAG, Cr: YSO, and so on.

Co ∶ MgAl2O4 is a highly efficient saturable absorber for easy Q-switched 1.5 μm “eye security” lasers. The peak power pulsed laser produced by the passive Q-switching also has the attributes of little human eye damage, solid smoke infiltration, small transmission attenuation, and more. It can be extensively used in space optical communication, fast-ranging battlefield, laser radar of unmanned equipment, and more.

3. Gain medium

Gain medium (i.e., laser working material) describes the material system used to understand the particle number inversion and produce the stimulated radiation-boosting impact of light. In some cases, also known as laser gain medium, they can be strong (crystal, glass), gas (atomic gas, ionic gas, molecular gas), semiconductor, fluid, and various other media. The primary demand of the laser working product is to achieve a huge bit number inversion between the particular energy levels of the functioning particles and to keep this inversion as efficiently as feasible in the entire laser exhaust process. To this end, it is required that the working substance have a suitable power-level framework and also transition attributes.

All lasers can be split right into the following classifications according to the different states of the functioning product:

(1) Solid (crystal as well as glass) laser

The functioning product used by this type of laser is made by blending metal ions which can create stimulated radiation right into the crystal or glass matrix to create the luminescence center;

(2) Gas lasers use the functioning material gas

According to the gas created by the excitation of the functioning bit residential properties of the various, and further separated into the atomic gas laser, ion gas laser, molecular gas laser, excimer gas laser, and so on;

(3) Liquid laser

This kind of laser used by the active substances mainly consists of 2 kinds. One is organic fluorescent color service. The other includes rare earth metal ions of not natural compound service, steel ions (such as Nd) play the duty of working fragments, as well as inorganic compound liquid plays the function of the matrix;

(4) Semiconductor laser

This type of laser is a particular semiconductor material as the functioning material to produce boosted emission. Its concept is with a certain excitation method (electric injection, optical pump, or high-energy electron light beam shot), between the semiconductor material power band or between the power band and the pollutant level, with the excitation of the non-equilibrium service provider to accomplish the particle number turnaround. Therefore, boosted emission of light is created;

(5) In Free electron laser

Which is a special sort of brand-new laser. The working material is the directional complimentary electron beam moving at broadband in the room with regular electromagnetic field changes, as long as the speed of the complimentary electron beam can be changed to create a tunable coherent electromagnetic radiation. In concept, the coherent radiation range can transition from the X-ray band to the microwave area, so it has a very attractive possibility.


It is a great 2.94 μm laser crystal, extensively used in clinical laser systems and other areas. Er: YAG crystal is one of the most important working compounds of 3mm laser, and has the qualities of high incline effectiveness, can work at space temperature laser, laser wavelength within the risk-free range of human eyes, etc. 2.94 mm Er: YAG laser has been widely utilized in the clinical field of surgical treatment, aesthetic dermatology, dentistry as well as other therapies.

Benefits of Er: YAG

  • 1. High slope performance
  • 2. Operate at area temperature
  • 3, the laser functioning wavelength is reasonably safe for human eyes

Ti sapphire

Ti: sapphire (Ti3+: Al2O3) crystal is the most widely used tunable laser solid material, with excellent laser qualities– broad discharge bandwidth (0.65 ~ 1.2 μm), superb thermal, optical, physical, chemical, and also mechanical residential or commercial properties. Titanium-doped sapphire lasers and their laser systems are unparalleled in their phenomenal performance and the resulting diversity of applications, such as proton therapy, accelerator physics, nuclear physics, infrared spectroscopy, and also material characterization.

Erbium glass

Laser glass is a kind of strong laser product based on glass. It is widely used in numerous kinds of solid-state laser light and has become the primary laser product of high-power and high-energy lasers.
The characteristics of using glass as a working laser object are that it can extensively alter the chemical make-up as well as manufacturing procedure to get lots of crucial properties, such as fluorescence, high thermal stability, low thermal development coefficient, negative temperature level refraction coefficient, high optical harmony, and very easy to obtain a range of shapes and sizes, low cost, and so on.
Laser glass is an indispensable core material for high-power laser gadgets due to its large size, good optical uniformity, affordable and high production effectiveness.


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