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BBO（Beta-Barium Borate, β-BaB2O4）based Pockels cells operate from approximately 0.2 - 1.65 µm and are not subject to tracking degradation. BBO exhibits low piezoelectric response, good thermal stability, and low absorption. Due to the low piezoelectric coupling coefficients of BBO, BBO Pockels cells function at repetition rates of hundreds of kilohertz.
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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.
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BBO（Beta-Barium Borate, β-BaB2O4）based Pockels cells operate from approximately 0.2 - 1.65 µm and are not subject to tracking degradation. BBO exhibits low piezoelectric response, good thermal stability, and low absorption. Low
piezoelectric ringing makes this Pockels cell attractive for the control
of high-power and high-pulse repetition rate (hundreds of kilohertz, up to 1MHz) lasers.
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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.
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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.
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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.
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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.
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LBO (LiB3O5) is an excellent non-linear crystal of Borate-family following BBO. LBO has advantages of good ultraviolet transmittance (210-2300 nm), high laser damage threshold and large effective frequency doubling coefficient (about 3 times of KDP crystal). Therefore 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.
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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.
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When choosing a window, the user should consider whether the material's transmission properties and the mechanical properties of the substrate are consistent with specific requirements of the application. Coating is another important issue for choosing a proper window. WISOPTIC offer a wide variety optical windows with different coatings, e.g. anti-reflection coated precision windows for Nd:YAG laser applications.
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The Ceramic Laser Reflectors are high reflectance cavities used in solid state and CO2 laser systems. They are built either as a one-piece or two-piece system based on customer requirement.Ceramic cavities produce diffuse reflectance, which offers a very uniform beam profile. This diffuse reflectance also distributes light and consequently decreases hot spots in the pumped medium. These completely dense materials (e.g. Al2O3) exhibit higher strength and scratch resistance than traditional polymeric and thermoplastic materials.
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Solid Laser DyesThere is some work on dye lasers based on solid media, e.g.
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Dye laser headpiece made from WISOPTIC has very high conversion efficiency: 65%~75% for 532/585nm, 45%~55% for 532/650nm.
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WISOPTIC use in-house made dye laser cells to make dye laser handpieces. Pure input beam at 532nm is required to produce output beams of 585nm/595nm (energy over 100 mJ) and 650nm/660nm (energy over 80 mJ).
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Polymer-matrix Gain Medium for Pulsed Dye Laser (PDL)Polymer matrix can be used to make solid laser gain medium of dye lasers. Compared with the commonly used liquid-state dye laser unit, the solid-state material has many advantages, such as the convenience of handling, the various options of dimensions and shapes.
But the dye molecules in the polymer matrix might degradate in a limited time
by triplet excitation, or even destruct permanently. To avoid this shortage, WISOPTIC provides long quality guarantee period of every piece of Dye Laser Cell/Rod made in-house.
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Alumina Ceramic Reflectors are designed primarily for use in pumping chambers for many diverse laser
systems, e.g. YAG lasers.
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Wisoptic' standard and precision quality laser windows are fabricated from a variety of substrate
materials, e.g. UVFS
and N-BK7. They are available either with or without AR coatings, and with dia from 12.5 to 101.6 mm and thickness from 1 to 15 mm.
Also we offer uncoated rectangular windows with aperture from 15 x 20 to
50.8 x 50.8 mm and thickness from 2 to 10 mm.
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BBO is an effective NLO crystal for the SHG, THG, or FHG of Nd:YAG lasers, and the first-rate NLO crystal for the FHG at 213nm. Conversion efficiencies of more than 70% for SHG, 60% for THG and 50% for 4HG, and 200mw output at 213 nm (5HG) have been obtained through using Wisoptic's BBO, respectively.BBO is also an efficient crystal for the intracavity SHG of excessive energy Nd:YAG lasers. for the intracavity SHG of an acousto-optic Q-switched Nd:YAG laser, greater than 15 w average power at 532 nm generated via an AR-coated BBO crystal produced by Wisoptic.
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Dye Laser Handpiece are devices that screw onto the end of the laser's arm and convert the energy that the laser produces into different, new wavelengths of light.The two most common dye handpiece wavelengths are 585 nm and 650 nm,
which attach to Q-switched Nd:YAG lasers. For these wavelengths to be
produced, the Nd:YAG's 1064 nm wavelength is frequency-doubled to
produce the 532 nm wavelength, which is then converted by the dye
handpieces to produce either 585 nm or 650 nm. WISOPTIC use in-house made dye laser cells to make dye laser handpieces.
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YLF is birefringent, which eliminates thermally induced depolarization
loss. The gain and the emission wavelength of Nd:YLF are polarization
dependent: there is the stronger 1047nm ray for π polarization, and a
weaker one at 1053nm for σ polarization. Nd:YLF provides alternative to the more common Nd:YAG laser crystal for near IR
operation.
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Pockels Cell Driver for Q-Switching of Flashlamp Pumped LasersThese drivers are designed for Q-switching of nanosecond flashlamp pumped lasers without use of phase retardation plates, for example to drive a DKDP Pockels cell in YAG lasers for aesthetic therapy. High voltage is applied to Pockels cell in order to inhibit oscillation.
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A Pockels cell driver is a high-voltage regulated power supply,
either pulse or continuous, allowing to control a birefringence of an
electro-optical crystal (KTP, KD*P, BBO, etc.) in order to drive the
polarization direction of the light propagating through the crystal.WISOPTIC has developed and produces a variety of Pockels cell drivers
for different applications: from very simple compact devices for
q-switching to precise and powerful fast models for pulse picking,
cavity damping, regenerative amplifier control, etc.
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The high
damage threshold makes BBO cells more attractive than others in the high
power systems. Like LiNbO3 Pockels cells, BBO Pockels cells work in
transverse mode, which makes the cells very compact, and the half-wave
voltage designable. BBO Pockels cells are also suitable for systems with
high repetition rates.WISOPTIC has been granted of several patents for its technology of BBO Pockels cells. WISOPTIC’s mass products of BBO Pockels cell are gaining worldwide customers’ interest and trust for its high cost performance.
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LiNbO3 (Lithium Niobate, 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.Among the EO crystals, LN and DKDP are the two primary material that have been practical. DKDP crystals can be easily grown with a high optical homogeneity, which can satisfy the requirement of a large caliber Pockels cell.
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