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A corner cube (or cube corner), also known as a retroreflector, is an optical component with the unique ability to return an incoming beam of light directly towards its point of origin regardless of the beam's angle of entry. This property makes this prism type ideal for a wide variety of applications, such as laser resonator cavities, land surveying, ground based range-finding, satellite communications and space vehicle docking.Wisoptic offer a wide variety of retroreflectors at competitive prices and lead times, and are able to accommodate the most demanding requirements.

Readily available stock of periodically poled LN (PPLN) crystals can be provided on short lead time, with various specifications of sizes and periods.PPLN SHG crystals are available for pump laser wavelengths 976-2100 nm, generating light 488-1050nm.PPLN OPO crsytals are available for pump sources 515-1064 nm, generating visible and IR CW beams.PPLN DFG crystals are available for various combinations of pump sources, generating wavelengths 2-5.5 um.PPLN SFG crystals are available for various combinations of pump sources, generating wavelengths 500-700 nm.

Diffusion Bonded Crystal (DBC) is a crystalline solid used in photo optic applications. It consists of two, three or more parts of crystals with different dopants or same dopant with different doping levels. This material is commonly made by bonding one laser crystal with one or two undoped crystals by precise optical contact and further processing under high temperature.

High temperature phase BBO (alpha-BBO, a-BBO) is a negative uniaxial crystal with a large birefringence over the broad transparent range from 189 nm to 3500 nm. The physical, chemical, thermal, and optical properties of alpha-BBO crystal are similar to those of the low temperature phase beta-BBO crystal. However, there is no second order nonlinear effect in alpha-BBO crystal due to the centrosymmetry in its crystal structure and thus it has no use for second order nonlinear optical processes.

Erbium doped Yttrium Aluminum Garnet (Er:Y3Al5O12 or Er:YAG) combine various output wavelength with the superior thermal and optical properties of YAG. The emission wavelength of Er:YAG with doping concentration of 50% is 2940nm, which is at the position of water absorption peak and can be strongly absorbed by water molecules. Therefore, Er:YAG laser is widely used in plastic surgery and dentistry.

LBO (LiB3O5) is a kind of non-linear optical crystal with good ultraviolet transmittance (210-2300 nm), high laser damage threshold and large effective frequency doubling coefficient (about 3 times of KDP crystal). So LBO is commonly used to produce high power second and third harmonic laser light, especially for ultraviolet lasers.LBO has large band gap and transparency region, high non-linear coupling, good chemical and mechanical properties.

LBO (LiB3O5) is a kind of non-linear optical crystal with good ultraviolet transmittance (210-2300 nm), high laser damage threshold and large effective frequency doubling coefficient (about 3 times of KDP crystal). So LBO is commonly used to produce high power second and third harmonic laser light, especially for ultraviolet lasers.LBO has large band gap and transparency region, high non-linear coupling, good chemical and mechanical properties.

High temperature phase of α-BBO Crystal (BaB2O4) is one of the excellent birefringent crystals. It is characterized by large birefringent coefficient and wide transmission window ranged from 189nm to 3500nm. Due to its high chemical stability and medium hardness, α-BBO is fabricated easily into many kinds of optical components.The physical, chemical, thermal and optical properties of α-BBO are similar to those of β-BBO.

Beta-BBO crystal is an important nonlinear optical crystal with combination of unique optical properties, such as broad transmission and phase matching ranges, large nonlinear coefficient, high damage threshold and excellent optical homogeneity. The β-BBO crystal is an efficient material for the second, third and fourth harmonic generation of Nd:YAG lasers, and the best NLO material for the fifth harmonic generation at 213 nm.

Lithium Niobate (LiNbO3) is widely used  in fiber communication devices as birefringent crystal and used as electro-optic modulator and Q-switch for Nd:YAG, Nd:YLF and Ti:Sapphire lasers. It has good mechanical and physical properties and is ideal for optical polarizing components due to its wide transparency range and low cost. LiNbO3's applications for fiber communication include isolators, circulators, beam displacers, and other polarizing optics. The transverse modulation is mostly employed for LiNbO3 crystal.

Lithium  Niobate (LN) crystal has excellent electro-optic, acousto-optic,  piezoelectric and nonlinear properties. More and more attention has been paid on its application in military technology. LN crystal has large nonlinear optical coefficient and can easily achieve non-critical phase matching. As an E-O material, LN crystal has been used as an important optical waveguide material.

Compared to more commonly used KTP crystal, KTA crystal has larger non-linear optical and electro-optical coefficients. KTA has the added benefit of significantly reduced absorption in the 2 to 5 μm region.  It has found more and more applications in second harmonic generation (SHG), sum and difference frequency generation (SFG)/(DFG), optical parametric oscillation/ amplification (OPO/OPA), and electro-optical Q-switching. WISOPTIC do in-house growing and processing KTA crystal with high optical quality and various options of dimensional and coating specifications.

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.

Tm:YAP crystal is one of the most important crystals for LD pumping 2μm 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. Compared with the physical and chemical properties of Tm:YAG, the 795nm pump absorption band of Tm:YAP matches the emission wavelength of commonly used high-power AlGaAs diodes better.

Compared with congruent LN (cLN) crysal, the electro-optic coefficient, nonlinear optical coefficient, periodic polarization reversal voltage and applied photorefractive properties of stoichiometric LN (sLN) crystal are greatly improved. With such excellent physical properties and wide application prospects, sLN crystal has rapidly become a competitive optoelectronic material.sLN crystals are expected to be thermodynamically stable up to their melting temperature at 1170°C, while keeping a largerelectrical resistivity than cLN crystals by one order of magnitude at any temperature.

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.

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.

Beta-Barium Borate (β-BBO) is an excellent nonlinear crystal with combination of a number of unique features: wide transparency region, broad phase-matching range, large nonlinear coefficient, high damage threshold, and excellent optical homogeneity. Therefore, β-BBO provides an attractive solution for various nonlinear optical applications such as OPA, OPCPA, OPO etc. β-BBO also has advantages of large thermal acceptance bandwidth, high damage threshold and small absorption, thus is very suitable for frequency conversion of high peak or average power laser radiation, e.g.

Barium Borate exists in three major crystalline forms: alpha, beta, and gamma. The low-temperature beta phase converts into the alpha phase upon heating to 925 °C. β-BBO differs from α-BBO by the positions of the barium ions within the crystal. Both phases are birefringent, however α-BBO has centric symmetry and thus does not has the same nonlinear properties as β-BBO.α-BBO is a negative uniaxial crystal with a large birefringence over the broad transparent range from 189 nm to 3500 nm.

LN 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.As one of the most thoroughly characterized nonlinear optical materials, LiNbO3 is suitable for a variety of frequency conversion applications. For example, it is widely used as frequency doublers for wavelength >1 μm and optical parametric oscillators (OPOs) pumped at 1064 nm as well as quasi-phase-matched (QPM) devices.

Nd:YVO4 (Neodymium-doped Yttrium Vanadate) is the most efficient laser crystal for diode-pumped solid-state lasers. Its good physical, optical and mechanical properties make Nd:YVO4 an excellent crystal for high power, stable and cost-effective diode-pumped solid-state lasers, especially for lasers with low or middle power density. Nd:YVO4  is a good choice for highly polarized output at 1342 nm, as the emission line is much stronger than those of its alternatives.

Diffusion bonded crystal consists of two, three or more parts of crystals with different dopants or same dopant with different doping levels. This material is commonly made by bonding one laser crystal with one or two undoped crystals by precise optical contact and further processing under high temperature.

Beta-Barium Borate (β-BBO) is an excellent nonlinear crystal with combination of a number of unique features: wide transparency region, broad phase-matching range, large nonlinear coefficient, high damage threshold, and excellent optical homogeneity. Therefore, β-BBO provides an attractive solution for various nonlinear optical applications such as OPA, OPCPA, OPO etc.β-BBO also has advantages of large thermal acceptance bandwidth, high damage threshold and small absorption, thus is very suitable for frequency conversion of high peak or average power laser radiation, e.g.

Nd: YLF (Nd:LiYF4) is a laser material that acts as an alternative to Nd:YAG. It is very suitable for working in mode-locked state to make pulse lasers at wavelength 1053nm, 1047nm, 1313nm, 1324nm and 1370 nm. Nd:YLF has very small thermal lens effect (much smaller than YAG crystal), wide fluorescent line, and can generate linear-polarized beam. The relatively small stimulated emission cross section of Nd:YLF makes it suitable for continuous work with low threshold.