1. Frequency-doubling crystal
Frequency doubling crystal is a kind of nonlinear optical crystal for frequency doubling.
(1) Without main balance;
(2) High openness of essential and also double frequency waves;
(3) The square nonlinear electric polarization coefficient is large because the regularity doubling conversion effectiveness is symmetrical to the square of this coefficient;
(4) Partial matching capacity, especially non-critical matching ability. Phase matching Angle as well as temperature resistance ought to remain in;
(5) Good optical harmony, high damages limit;
(6) Stable physical and chemical homes; The development procedure is reasonably simple to get crystals large sufficient to reach usable lengths in the placement matching instructions.
BBO crystal
BBO crystal is a sort of nonlinear optical crystal with apparent extensive advantages and great efficiency. It has an extremely large light transmittance variety, incredibly low absorption coefficient, and weak piezoelectric ring result. Compared to other electro-optic regulated crystals, BBO crystal has a higher extinction ratio, a bigger stage supporting duty, a greater anti-light damage threshold, broadband temperature level matching, and also excellent optical uniformity. It is beneficial to enhance the security of laser output power, specifically for the triple frequency Nd: YAG laser has a large range of applications.
Key uses of BBO crystal:
(1) Used in 1064nm Nd: YAG laser with dual, triple, quadruple, and also fivefold regularity.
(2) Made use of in-dye laser and titanium treasure laser of double regularity, three-way regularity, sum regularity, difference frequency, and so on.
(3) For optical parametric oscillation, amplifier, etc.
BBO switch: photoelectric Q switch made of BBO, usually used in high repetition frequency, high power photoelectric Q-switched laser, all solid state picosecond, femtosecond regeneration amplification system.
Due to the turn-off time of the electro-optic Q switch being much shorter than the optical break time of acousto-optic Q button. For that reason, the all-solid-state short-cavity Q-switched laser using BBO electro-optic Q switch can produce a high-energy laser with a pulse width of less than 4ns, which is the preferred source of light for electro-optic internal sculpting equipment. BBO electro-optical Q button can be switched off as well as endure up to 150W of oscillating optical power in dental caries (laser result power up to 50W) without water air conditioning.
2. Q-switched crystal
Q-tuning can be divided into energetic Q-tuning and also passive Q-tuning, while energetic Q-tuning can be divided right into acousto-optical Q-tuning and also electro-optical Q-tuning.
Typically used easy Q-regulating crystals consist of: co: spinel, Cr: YAG, Cr: GSGG, V: YAG, Cr: YSO, and so on.
Co: MgAl2O4 is a very efficient saturable absorber for easy Q-switched 1.5 μm “eye safety and security” lasers. The peak power pulsed laser generated by the passive Q-switching also has the features of tiny human eye damage, solid smoke infiltration, tiny transmission attenuation, and so forth. It can be extensively made use of in the field of space optical communication, battlefield quick ranging, laser radar of unmanned devices, and more.
3. Gain medium
Gain medium (i.e. laser functioning material) refers to the material system used to realize the particle number inversion as well as generate the boosted radiation boosting effect of light, sometimes also known as laser gain medium, they can be solid (crystal, glass), gas (atomic gas, ionic gas, molecular gas), semiconductor and also liquid and also other media. The major need of the laser functioning product is to attain a large level of bit number inversion in between the certain energy levels of the functioning particles, as well as to keep this inversion as successfully as possible in the whole laser discharge procedure. To this end, it is required that the functioning substance have a proper energy degree framework and also shift attributes.
According to different states of product function, all lasers can divide requirements groups:
(1) Solid (crystal as well as glass) laser
The laser uses a working product made by mixing metal ions. Metal ions can produce accelerative radiation, directly into the crystal or glass substrate, forming luminescent facilities.
(2) Gas lasers
Make use of the functioning material gas, and also according to the gas really produced by the excitation of the functioning fragment properties of the different, as well as additionally split right into the atomic gas laser, ion gas laser, molecular gas laser, excimer gas laser, and so on.
(3) Fluid laser
This type of laser made use of by the working compounds mostly consists of two types, one is an organic fluorescent color option, and the other is consisting of rare earth steel ions of inorganic substance remedy, metal ions (such as Nd) play the role of working bits, as well as inorganic substance liquid plays the role of the matrix.
(4) Semiconductor laser
This type of laser is a certain semiconductor product as the functioning substance to produce promoted discharge, its concept is via a certain excitation way (electric injection, optical pump, or high-energy electron beam shot), between the semiconductor product power band or in between the energy band and also the pollutant level, with the excitation of the non-equilibrium carrier to accomplish the bit number reversal. Therefore, produced enhanced light emission.
(5) Free electron laser
Which is a special type of brand-new laser. The working material is the directional totally free electron beam moving at high speed in the room with regular modification of the electromagnetic field. By changing the speed of the complementary electron beam, You can produce tunable coherent electromagnetic radiation. In concept, the systematic radiation range can change from the X-ray band to the microwave area, so it has a very appealing possibility.
Er: YAG
Er: YAG is an excellent 2.94 μm laser crystal. Laser medical systems and various other fields widely use it. It is one of the most essential working compounds of a 3mm laser. It has the attributes of high slope efficiency, can work at room temperature laser, laser wavelength within the secure series of human eyes, etc. 2.94 mm Er: YAG laser has been extensively made use of in the medical field of surgery, cosmetic dermatology, dental care as well as other treatments.
Advantages of Er: YAG
- High slope effectiveness
- Operate at room temperature
- The laser functioning wavelength is fairly secure for human eyes
Ti sapphire
Titanium-doped Sapphire (Ti3+: Al2O3) crystal, one of tunable laser solid products With outstanding laser qualities– broad emission transmission capacity (0.65 ~ 1.2 μm), superb thermal, optical, physical, chemical, and also mechanical residential or commercial properties. Titanium-doped sapphire lasers as well as their laser systems are unequaled in their phenomenal efficiency and the resulting variety of applications, such as proton treatment, accelerator physics, nuclear physics, infrared spectroscopy as well as product characterization.
Erbium glass
Laser glass is a type of solid laser product based on glass. Numerous sorts of solid-state laser light commonly made use of it, as well as has actually come to be the major laser product of high power as well as high-power laser.
The features of using glass as a laser functioning item are that it can commonly transform the chemical make-up and also the manufacturing process to acquire several crucial buildings, such as fluorescence, high thermal stability, low thermal expansion coefficient, negative temperature refraction coefficient, high optical uniformity, and also easy to obtain a range of sizes and shapes, low cost, etc.
Laser glass is an important core material for high-power laser devices due to its characteristics of plus size, excellent optical uniformity, low cost, and high production efficiency.
