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0 Regularity multiplier crystal
Regularity doubling crystal is a kind of nonlinear optical crystal utilized for regularity doubling impact
Standard residential properties
- Without central proportion;
- High transparency of fundamental and also dual frequency waves;
- The square nonlinear electrical polarization coefficient is large, because the regularity increasing conversion performance is proportional to the square of this coefficient;
- Partial matching capability, particularly non-critical matching capacity. Stage matching Angle and temperature level resistance must be in;
- Good optical harmony, high damages limit;
- Steady physical and chemical residential or commercial properties; The development procedure is relatively easy to obtain crystals huge enough to get to functional lengths in the placement matching direction.
BBO nonlinear crystal
BBO crystal is a kind of nonlinear optical crystal with noticeable extensive advantages as well as excellent performance. It has an extremely vast light transmittance array, exceptionally low absorption coefficient, weak piezoelectric ring effect. Compared to various other electro-optic regulated crystals, BBO crystal has a greater termination ratio, a larger phase supporting duty, a higher anti-light damage limit, broadband temperature level matching and also excellent optical harmony. It is beneficial to enhance the stability of laser result power, particularly for the triple regularity Nd: YAG laser has a wide range of applications.
Main uses of BBO crystal:
- Made Use Of in 1064nm Nd: YAG laser with double, three-way, quadruple and also fivefold regularity.
- Used in color laser as well as titanium gem laser of dual regularity, triple frequency, amount frequency, distinction regularity, etc.
- For optical parametric oscillation, amplifier, etc.
Q-switched crystal
Q-tuning can be divided into active Q-tuning and passive Q-tuning, while energetic Q-tuning can be separated into acousto-optical Q-tuning and also electro-optical Q-tuning.
Frequently utilized easy-Q-regulating crystals consist of: Co: Spinel, BBO electro-optic crystal, Cr: YAG, Cr: GSGG, V: YAG, Cr: YSO, and so on.
BBO electro-optic crystal
BBO Pockels cell: The electro-optical Q switch made from the BBO Pockels cell is often used in high-repeating-frequency, high-power electro-optical Q-switched lasers, all-solid picosecond lasers, and femtosecond regeneration amplification systems.
Because the turn-off time of an electro-optic Q switch (<4 ns) is much shorter than the optical break time of an acousto-optic Q button. Consequently, the all-solid-state short-cavity Q-switched laser using the BBO Pockels cell can produce a high-energy laser with a pulse size less than 4 ns, which is the recommended source of light for an electro-optic interior sculpting device. The BBO Pockels cell can be turned off and also stand up to approximately 150 W of oscillating optical power in the tooth cavity (a laser result power of approximately 50 W) without water cooling.
Co:Spinel crystal
Co∶ MgAl2O4 is an extremely effective saturable absorber for easy Q-switched 1.5 μm “eye safety” lasers. The peak power pulsed laser produced by the passive Q-switching additionally has the characteristics of tiny human eye damage, solid smoke infiltration, little transmission depletion, and so on. It can be widely used in the fields of room optical communication, battlefield fast varying, laser radar of unmanned equipment, and so on.
Gain medium
Gain medium (i.e., laser functioning substance) refers to the material system utilized to understand the particle number inversion as well as generate the promoted radiation amplification impact of light. In some cases likewise referred to as laser gain medium, they can be strong (crystal, glass), gaseous (atomic gas, ionic gas, molecular gas), semiconductor, fluid, and also various other media. The primary requirement of the laser functioning product is to accomplish a large level of particle number inversion between certain energy degrees of the functioning bits and to maintain this inversion as successfully as feasible throughout the whole laser exhaust procedure. To this end, it is called for that the working compound have an ideal power level framework and also change characteristics.
Classification of laser gain media
All lasers can be separated into the complying with classifications according to the different state of the functioning material:
- Strong (crystal and also glass) laser, the functioning product utilized by this type of laser, is made by mixing steel ions which can create stimulated radiation into the crystal or glass matrix to develop the luminescence center;
- Gas lasers, they utilize the functioning material is gas, and also according to the gas truly generated by the excitation of the functioning fragment residential properties of the various, and also additionally split right into atomic gas laser, ion gas laser, molecular gas laser, excimer gas laser, and so on;
- Liquid laser, this sort of laser made use of by the working substances mostly consist of two kinds, one is organic fluorescent dye service, the various other is containing rare earth metal ions of not natural compound option, steel ions (such as Nd) play the duty of working bits, and also not natural substance fluid (such as SeOCl) plays the duty of matrix;
- Semiconductor laser, this kind of laser is a particular semiconductor product as the working compound to create promoted discharge, its principle is through a particular excitation method (electric injection, optical pump or high-energy electron beam of light injection), between the semiconductor material energy band or in between the energy band and also the pollutant level, with the excitation of non-equilibrium service provider to attain the particle number reversal. Therefore, boosted discharge of light is created;
- Free electron laser, which is an unique type of new laser, the working material is the directional complimentary electron beam of light relocating at high speed in the space periodic adjustment of magnetic field, as long as the rate of the free electron light beam can be altered to produce a tunable systematic electromagnetic radiation, in principle, the coherent radiation range can change from the X-ray band to the microwave region, so it has a really appealing possibility.
Er yag
Er: YAG is an exceptional 2.94 μm laser crystal, which is widely utilized in laser clinical system as well as other areas. Er: YAG crystal is one of the most vital functioning compound of 3mm laser, and has the features of high slope effectiveness, can work at area temperature laser, laser wavelength within the secure range of human eyes, and so on 2.94 mm Er: YAG laser has been commonly made use of in the medical field of surgery, aesthetic dermatology, dentistry and other therapies.
Benefits of Er:YAG
- High slope performance
- Work at area temperature
- The laser working wavelength is fairly secure for human eyes
Ti shapphire
Ti-doped sapphire (Ti3+: Al2O3) crystal is one of the most extensively used tunable laser solid products, with superb laser features, including wide exhaust transmission capacity (0.65 1.2 μm), excellent thermal, optical, physical, chemical, and mechanical properties. Titanium-doped sapphire lasers and their laser systems are unequaled in their remarkable performance as well as the resulting diversity of applications, such as proton therapy, accelerator physics, nuclear physics, infrared spectroscopy, and material characterization.
Erbium glass
Laser glass is a type of strong laser material based on glass. It is widely used in numerous types of solid-state laser light and has ended up being the major laser product for high power and high energy lasers.
The attributes of using glass as a laser working material are that it can extensively transform the chemical make-up as well as the production process to obtain lots of important properties, such as fluorescence, high thermal stability, reduced thermal growth coefficient, adverse temperature level refraction coefficient, high optical uniformity, as well as being very easy to obtain a variety of sizes and shapes, low cost, and so on.
Laser glass is an essential core product for high-power laser gadgets due to its characteristics of plus size, great optical harmony, affordability, and high manufacturing efficiency.
