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CTH:YAG
Cr:Tm:Ho:YAG (CTH:YAG) is an excellent crystal that emits 2.1μm wavelength laser and is widely used in medical, military and meteorological fields. WISOPTIC uses high-purity raw materials and sophisticated technology to produce high-quality CTH:YAG crystals. This crystal is capable to output high pulse energy and is suitable for repetitive frequency operation. WISOPTIC provide laser rods with diameters of 3 to 6 mm and lengths of 50 to 120 mm.
Features of CTH:YAG
-High slope efficiency, room temperature operation
-Suitable for lamp pumping or LD pumping
-Safe for human eyes
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LiNbO3 / PPLN Crystal
LiNbO3 (Lithium Niobate) crystal is a multifunctional material that integrates properties of piezoelectric, ferroelectric, pyroelectric, nonlinear, electro-optical, photoelastic, etc. LiNbO3 has good thermal stability and chemical stability. Periodically Polarized Lithium Niobate (PPLN) is a highly efficient wavelength conversion non-linear crystal with wide light transmission range (0.4-4.5 µm) covering the near and mid-infrared regions, long service life, and can be used for frequency doubling, beat frequency, sum frequency, optical parametric oscillation and optical parametric amplification, etc.
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Tm:YAP Crystal
Tm:YAP crystal is one of the most important crystals for LD pumping 2 μm laser. The anisotropic structure of Tm:YAP produces anisotropic emission cross section. Tm:YAP crystals with different orientations have different output wavelengths and operating forms for different functions. Tm:YAP has the following main advantages: Excellent physical and chemical properties; Higher output efficiency at 2 μm than Tm:YAG; Direct output of linearly polarized light. LD pump absorption bandwidth is 4nm wider than that of Tm:YAG crystal; The 795nm pump band matches the emission wavelength of AlGaAs diodes better. -
Tm:YLF Crystal
Tm3+:YLF crystal has a high absorption peak around 792 nm which locates in the diode pumping range, and also has a cross-relaxation process that provides the possibility for each absorbed pump photon to produce to ions at higher laser energy level. Tm3+: YLF laser is very suitable as a pump source for Ho3+:YAG laser. This is due to the good overlap of the emission band of Tm3+:YLF and the absorption band of Ho3+:YAG, and the ability to produce a linearly polarized output. Furthermore, the refractive index of Tm3+:YLF decreases with temperature, leading to negative thermal lens effect, which is partially compensated by positive lens effect caused by convex end. -
Tm:YAG Crystal
The self-quenching mechanism of the H4 and F4 levels of Tm:YAG crystals can generate two-photon excitation at the upper level, potentially making it an efficient way for lasers to achieve high quantum efficiency. Tm:YAG crystals are widely used in lidar and other atmospheric detection fields because of their operating wavelength of 2013nm. The fluorescence lifetime of Tm in Tm:YAG crystal is twice as long as that of Tm:YAP crystal, the emission cross-sectional area of Tm:YAG crystal is slightly lower than that of Tm:YAP crystal, and the peak absorption band is 785nm, which is more suitable for semiconductor diode pumping. -
Yb:YAG Crystal
Ytterbium Doped Yttrium Aluminum Garnet (Yb:YAG) is more suitable for diode-pumping than the traditional Nd-doped laser crystal. Features of Yb:YAG produced by WISOPTIC:
• High slope efficiency
• Broad absorption bands (about 8 nm @ 940 nm)
• No excited-state absorption or up-conversion
• Easily pumped by reliable InGaAs diodes at 940 nm (or 970 nm)
• Low fractional heating (less than 11%)
• High thermal conductivity
• Good mechanical strength
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Er:YAG Crystal
Erbium Doped Yttrium Aluminum Garnet (Er:YAG) lases at 2940 nm which is the same as hydroxyl absorption peak. Therefore the rays produced by Er:YAG can be strongly absorbed by biological tissues which make Er:YAG lasers being widely used in medical area, such as dental (hard tissues), orthopedics, etc. Er:YAG produced by WISOPTIC has high quality of good internal optical uniformity and high slope efficiency. -
Cr4+:YAG Crystal
Chromium Doped Yttrium Aluminum Garnet (Cr4+: YAG) is an excellent material for passively Q-switching diode pumped or lamp-pumped Nd:YAG, Nd:YLF, Nd:YVO4 or other Nd/Yb doped lasers at wavelength 0.8~1.2 μm. Cr4+: YAG might replace traditional material, such as LiF, organic Dye and color centers due to its advantages such as: being chemically stable, durable, UV resistant, having good thermal conductivity and high damage threshold (＞500 MW/cm2 ), and being easy to be operated. WISOPTIC provides Cr4+:YAG with Cr4+ doping level of 0.5~3 mol% and with cross sections from 2 × 2 mm2 to 14 × 14 mm2 and length from 0.1 mm to 12 mm. The initial transmission is 10% ~92% according to customers' requirements. -
Periodically Poled Lithium Niobate (PPLN)
WISOPTIC provide high quality LN crystals including: pure LiNbO3, MgO:LN, Periodically Poled Lithium Niobate (PPLN), and MgO:PPLN. The doping ratio of MgO is typically 5%. WISOPTIC's PPLN could be used at 460-5100nm, and the polarization period is 4.0-35μm. These PPLN crystals in various sizes and period could be coated and mounted according to customer's request. WISOPTIC also provide heater/oven (heating type: heating resistance) and temperature controller for PPLN. -
BBO Crystal
BBO crystal has two types: α-BBO and β-BBO.
The physical, chemical, thermal and optical properties of α-BBO are similar to those of β-BBO. However, α-BBO has no nonlinear optical property due to its centric symmetry structure while β-BBO has acentric symmetry structure. α-BBO is widely used in high power laser system as devices of Glan prisms, polarizing beam splitters, compensators and so on. β-BBO provides an attractive solution for various nonlinear optical applications such as OPA, OPCPA, OPO etc.
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KTA Crystal
KTA (Potassium Titanyle Arsenate, KTiOAsO4 ) is a nonlinear optical crystal similar to KTP in which atom P is replaced by As. It has good non-linear optical and electro-optical properties, e.g. significantly reduced absorption in band range of 2.0-5.0 µm, broad angular and temperature bandwidth, low dielectric constants. -
KDP & DKDP Crystal
KDP (KH2PO4 ) and DKDP/KD*P (KD2PO4 ) are among the most widely-used commercial NLO materials. With good UV transmission, high damage threshold, and high birefringence, these material are usually used for doubling, tripling and quadrupling of Nd:YAG laser.
