1. Regularity multiplier crystal
Regularity doubling crystal is a kind of nonlinear optical crystal utilized for regularity doubling impact.
Basic residential properties
- Without main balance;
- High openness of essential and also dual frequency waves;
- The square nonlinear electric polarization coefficient is large, due to the fact that the frequency increasing conversion effectiveness is symmetrical to the square of this coefficient;
- Partial matching capability, specifically non-critical matching capability. Stage matching Angle and temperature resistance must remain in;
- Excellent optical harmony, high damages limit;
- Steady physical as well as chemical properties;
- The growth procedure is reasonably easy to get crystals huge enough to get to usable lengths in the placement matching direction.
BBO crystal
BBO nonlinear crystal is a kind of nonlinear optical crystal with apparent detailed advantages and also great performance. It has an incredibly vast light transmittance variety, very reduced absorption coefficient, weak piezoelectric ring effect. Compared with other electro-optic modulated crystals, BBO crystal has a higher extinction proportion, a larger phase sustaining function, a higher anti-light damages threshold, broadband temperature matching and also exceptional optical uniformity. It is beneficial to enhance the security of laser output power, particularly for the triple frequency Nd: YAG laser has a variety of applications.
Main use BBO crystal:
- Used in 1064nm Nd: YAG laser with dual, three-way, quadruple and also fivefold regularity.
- Utilized in color laser as well as titanium gem laser of dual regularity, triple regularity, amount regularity, distinction frequency, and so on( 3) For optical parametric oscillation, amplifier, and so on.
BBO switch: The electro-optical Q switch made of BBO button is commonly used in high repeating regularity, high power electro-optical Q-switched laser, all-solid picosecond, femtosecond regrowth amplification system.
Because 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 utilizing BBO electro-optic Q button can generate high-energy laser with pulse width less than 4ns, which is the favored source of light of electro-optic internal carving device. BBO electro-optical Q button can be shut off and also endure approximately 150W of oscillating optical power in the tooth cavity (laser outcome power as much as 50W) without water cooling.
2. Q-switched crystal
Q-tuning can be divided right into energetic Q-tuning and passive Q-tuning, while energetic Q-tuning can be split into acousto-optical Q-tuning as well as electro-optical Q-tuning.
Typically made use of passive Q-regulating crystals include: co: spinel, Cr: YAG, Cr: GSGG, V: YAG, Cr: YSO, and so on.
Co:Spinel
Co ∶ MgAl2O4 is a highly effective saturable absorber for passive Q-switched 1.5 μm “eye safety and security” lasers. The peak power pulsed laser created by the passive Q-switching also has the qualities of tiny human eye damages, solid smoke penetration, small transmission attenuation and so on. It can be widely utilized in the field of room optical interaction, battlefield quick varying, laser radar of unmanned devices and so forth.
3. Gain medium
Gain medium (i.e. laser functioning material) refers to the material system used to realize the particle number inversion and also generate the stimulated radiation boosting impact of light, occasionally likewise called laser gain tool, they can be solid (crystal, glass), gas (atomic gas, ionic gas, molecular gas), semiconductor and also liquid as well as other media. The main need of the laser working material is to achieve a huge level of bit number inversion in between the specific power levels of the working bits, and to maintain this inversion as properly as possible in the entire laser emission process. To this end, it is required that the functioning material have ideal energy level structure as well as change qualities. All lasers can be split into the complying with classifications according to the various state of the functioning material:
Solid laser
Solid (crystal and also glass) laser, the working material used by this sort of laser, is made by mixing steel ions which can create boosted radiation right into the crystal or glass matrix to form the luminescence facility;
Gas laser
Gas lasers, they make use of the functioning material is gas, as well as according to the gas truly created by the excitation of the functioning bit residential or commercial properties of the different, as well as additionally divided right into atomic gas laser, ion gas laser, molecular gas laser, excimer gas laser, and so on;
Liquid laser
Liquid laser, this kind of laser used by the working substances mainly consist of 2 kinds, one is organic fluorescent color remedy, the other is including rare earth metal ions of not natural compound solution, metal ions (such as Nd) play the role of working fragments, as well as inorganic substance fluid (such as SeOCl) plays the function of matrix;
Semiconductor laser
Semiconductor laser, this type of laser is a certain semiconductor product as the working material to produce stimulated exhaust, its principle is via a certain excitation means (electrical shot, optical pump or high-energy electron light beam shot), between the semiconductor product power band or in between the energy band as well as the contamination level, with the excitation of non-equilibrium provider to achieve the bit number reversal. Thus, stimulated exhaust of light is produced;
Free electron laser
Free electron laser, which is a special type of new laser, the functioning product is the directional cost-free electron beam relocating at high speed in the space routine change of electromagnetic field, as long as the rate of the free electron beam of light can be changed to generate a tunable meaningful electromagnetic radiation, in principle, the systematic radiation spectrum can shift from the X-ray band to the microwave area, so it has a really eye-catching prospect.
Er:YAG crystal
Er: YAG is a superb 2.94 μm laser crystal, which is extensively utilized in laser medical system as well as other fields. Er: YAG crystal is the most crucial working compound of 3mm laser, and has the features of high incline effectiveness, can operate at space temperature level laser, laser wavelength within the secure series of human eyes, and so on 2.94 mm Er: YAG laser has actually been widely utilized in the medical field of surgery, aesthetic dermatology, dentistry and also other treatments.
Advantages of Er: YAG
- High slope performance
- Operate at room temperature
- The laser working wavelength is fairly safe for human eyes
Ti shapphire
Ti-doped sapphire (Ti3+: Al2O3) crystal is one of the most widely utilized tunable laser solid material, with excellent laser characteristics– wide exhaust bandwidth (0.65 ~ 1.2 μm), exceptional thermal, optical, physical, chemical and mechanical properties. Titanium-doped sapphire lasers and also their laser systems are unequaled in their phenomenal performance and the resulting diversity of applications, such as proton treatment, accelerator physics, nuclear physics, infrared spectroscopy as well as material characterization.
Erbium glass
Laser glass is a kind of strong laser material based upon glass. It is widely made use of in different types of solid-state laser light, as well as has actually ended up being the major laser material of high power as well as high energy laser.
The qualities of using glass as a laser functioning object are that it can widely transform the chemical composition as well as production process to get numerous vital homes, such as fluorescence, high thermal stability, low thermal growth coefficient, negative temperature refraction coefficient, high optical harmony, and simple to get a range of shapes and sizes, affordable price, etc.
Laser glass is an important core material for high power laser devices because of its features of large size, great optical uniformity, affordable as well as high manufacturing performance.
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