Frequency multiplier crystal
Frequency doubling crystal is a type of nonlinear optical crystal utilized for regularity doubling effect.
Standard residential or commercial properties
- Without main proportion;
- High openness of fundamental and double frequency waves;
- The quadratic nonlinear electric polarization coefficient is huge, because the frequency increasing conversion performance is proportional to the square of this coefficient;
- Partial matching capacity, specifically non-critical matching ability. Stage matching Angle and also temperature level resistance need to remain in;
- Good optical uniformity, high damage limit;
- Stable physical and chemical homes;
The development process is relatively easy to acquire crystals large sufficient to reach functional sizes in the position matching direction.
BBO crystal is a sort of nonlinear optical crystal with noticeable detailed advantages as well as excellent efficiency. It has an incredibly vast light transmittance range, incredibly reduced absorption coefficient, weak piezoelectric ring result. Compared with other electro-optic modulated crystals, BBO crystals have the following advantages:
- greater extinction ratio
- larger phase supporting role
- greater anti-light damages threshold
- broadband temperature level matching
- exceptional optical harmony.
Improving the security of laser output power is beneficial. Particularly for the triple frequency Nd: YAG laser has many applications.
Key uses of BBO crystal:
- Made Use Of in 1064nm Nd: YAG laser with double, triple, quadruple and also fivefold regularity.
- Made use of in dye laser and titanium treasure laser of double regularity, three-way frequency, amount regularity, distinction regularity, etc.
- For optical parametric oscillation, amplifier, and so on.
BBO switch: Electro-optical Q switches composed of BBO crystals can be used in these applications:
- High repeating regularity
- High power electro-optical Q-switched laser
- All-solid picosecond
- Femtosecond regrowth amplification system
As a result of the turn-off time of electro-optic Q button (< < 4ns) is 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 a BBO electro-optic Q switch can generate a high-energy laser with a pulse size of less than 4ns. The preferred light source of electro-optic interior carving equipment. BBO electro-optical Q button can be shut off and endure as much as 150W of oscillating optical power in dental caries (laser outcome power approximately 50W) without water cooling.
Q-switched can be separated right into energetic Q-switching and passive Q-tuning. At the same time, active Q-tuning can be divided right into acousto-optical Q-switch and electro-optical Q-switch.
Typically used passive Q-regulating crystals include: co: spinel, Cr: YAG, Cr: GSGG, V: YAG, Cr: YSO, etc
Co:MgAl2O4 is an extremely efficient saturable absorber for passive Q-switched 1.5 μm “eye safety and security” lasers. The peak power pulsed laser produced by the passive Q-switching additionally has the attributes of small human eye damage, strong smoke penetration, little transmission attenuation and so on. Co: Spinel can commonly utilize it in space optical interaction, fast battlefield varying, laser radar of unmanned tools, etc.
Gain medium (i.e. laser working substance) refers to the material system utilized to recognize the particle number inversion and produce the stimulated radiation-boosting effect of light. Occasionally referred to as laser gain medium, they can be solid, gas, semiconductor and liquid, as well as other media. The major need of the laser functioning product is to attain a big degree of fragment number inversion in between the details power levels of the working particles, as well as to maintain this inversion as efficiently as possible in the whole laser emission procedure. To this end, it is needed that the working compound have appropriate power level structure and change qualities.
Type of gain medium
All lasers can be divided into the adhering to categories according to the various state of the working material:
Solid (crystal and glass) laser, the working product, uses this kind of laser. That is made by blending steel ions which can create promoted radiation into the crystal or glass matrix to create the luminescence centre;
Gas lasers, they make use of the working substance is gas, and according to the gas actually produced by the excitation of the functioning fragment properties of the various, and also additionally separated right into atomic gas laser, ion gas laser, molecular gas laser, excimer gas laser, etc;
Fluid laser, this type of laser used by the working materials mainly include 2 types, one is natural fluorescent color service, the various other is including rare earth steel ions of inorganic compound solution, metal ions (such as Nd) play the function of functioning particles, as well as inorganic substance fluid (such as SeOCl) plays the role of matrix;
Semiconductor laser, this type of laser is a certain semiconductor material as the functioning material to produce promoted exhaust, its concept is with a specific excitation method (electrical injection, optical pump or high-energy electron light beam shot), between the semiconductor product energy band or in between the energy band and also the impurity level, via the excitation of non-equilibrium service provider to attain the fragment number reversal. Therefore, promoted discharge of light is produced;
Free electron laser
Free electron laser, which is a special kind of new laser, the functioning material is the directional complimentary electron light beam moving at high speed in the room routine modification of electromagnetic field, as long as the rate of the cost-free electron light beam can be transformed to generate a tunable meaningful electromagnetic radiation, in concept, the coherent radiation spectrum can transition from the X-ray band to the microwave region, so it has a really appealing possibility.
Erbium: YAG is an excellent 2.94 μm laser crystal, which is extensively made use of in laser medical system and other fields. The Er: YAG crystal is one of the most important functioning substance of 3mm laser, and also has the features of high incline effectiveness, can work at area temperature level laser, laser wavelength within the safe variety of human eyes, and so on 2.94 mm erbium doped YAG laser has actually been extensively used in the medical area of surgical procedure, aesthetic dermatology, dentistry as well as other therapies.
Benefits of Er:YAG
- High incline effectiveness
- Work at room temperature level
- The laser functioning wavelength is reasonably secure for human eyes
Ti-doped sapphire (Ti3+: Al2O3) crystal is one of the most commonly made use of tunable laser solid material, with excellent laser characteristics– vast emission bandwidth (0.65 ~ 1.2 μm), excellent thermal, optical, physical, chemical as well as mechanical properties. Titanium-doped sapphire lasers and their laser systems are unequaled in their extraordinary efficiency and also the resulting diversity of applications, such as proton treatment, accelerator physics, nuclear physics, infrared spectroscopy and also material characterization.
Er glass is a sort of solid laser product based upon glass. It is extensively made use of in numerous types of solid-state laser light, and also has actually become the primary laser material of high power as well as high energy laser.
The qualities of using glass as a laser functioning item are that it can widely alter the chemical structure and also manufacturing procedure to acquire numerous vital homes, such as fluorescence, high thermal security, reduced thermal growth coefficient, adverse temperature refraction coefficient, high optical harmony, as well as simple to get a range of sizes and shapes, small cost, and so on.
Laser glass is a crucial core product for high power laser tools due to its attributes of plus size, good optical harmony, low cost as well as high manufacturing effectiveness.