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EKSPLA offers crystalline materials - Barium Nitrate - Ba(NO3)2 and undoped potassium gadolinium tungstate KGd(WO4)2 or KGW which have attracted much interest as most suitable crystals for stimulated Raman scattering (SRS). These materials can be used for frequency conversion in lasers for extending of tuning range. SRS in crystals is compatible with current all-solid-state technology and provides a very simple, compact means of frequency conversion
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BBO is a nonlinear optical crystal with combination of a number of unique features: Wide transparency region Broad phase-matching range
Large nonlinear coefficient High damage threshold Wide thermal acceptance bandwidth High optical homogeneity
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Onyx has product lines of various Slabs, Disks and Rod-based AFB® components.
Onyx’s AFB® Yb:YAG/Sapphire and Yb:YAG/Undoped YAG disks are available in two-layer or three-layer configurations (one or two cladding layers, respectively). Specify your preference of Yb dopant, cladding type, layer thicknesses, and surface finishes. Both external surface and interface coatings are available.
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PHOTOP uses CZ technology to grow Nd:YVO4 crystal. With strict control from raw materials and growing process, our Nd:YVO4 is featured with low lasing wavelength absorption and very high efficiency. We supply Nd:YVO4 with Nd doping from 0.27atm%~4.0atm%. Crystals with various size and coating are available.
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EKSPLA offers: The mass production of LiIO3 crystals Attractive discounts for OEM customers Different shapes (slabs, cylinders, Brewster ends) are available Standard open ring holders Recoating and repolishing service
AR, BBAR and P - coatings subject to customer's choice P-coatings optimised at pump wavelengths BBAR coatings for wavelength tuned Ti:Sapphire and other lasers
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LBO is a nonlinear optical crystal with combination of a number of unique features: Wide transparency region Broad Type 1 and Type 2 non-critical phase-matching (NCPM) range Small walk-off angle High damage threshold Wide acceptance angle High optical homogeneity
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Yb-Doped Potassium Gadolinium Tungstate (Yb:KGd(WO4)2) and Yb-doped Potassium Itrium Tungstate (Yb:KY(WO4)2) single crystals are the laser crystals for diode or laser pumped solid-state laser applications.
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AFB® YVO4 or GdVO4 components are extremely useful for higher power in YVO4-based laser systems. Undoped end-caps increase damage threshold by separating the pump input face with the lasing doped portion. Onyx produces slabs and rods with plano or spherical end faces.
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PHOTOP is continuing to lead the crystal growing technologies in Fuzhou, Fujian, the center of crystal growth and manufacturing in China.
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Overview :
BBO : Beta Barium Borate
One of the most versatile nonlinear optical crystal materials available.
Features :
- High optical homogeneity (dn ~ 10-6)
- Excellent resistance to thermal fracture
- Up to 35 mm length
- Broad optical transparency range (190 to 3500 nm)
- Large nonlinear coefficients (deff = 1.94 pm/V for Type I SHG of 1064 nm)
- Large birefringence (no-ne = 0.115 @ 1064 nm)
- High laser damage threshold (5 GW/cm2 @ 1064 nm with 10 ns pulses)
Beta Barium Borate ( b-BaB2O4 ), or BBO, is one of the most versatile nonlinear optical crystal materials available. BBO is most commonly used for second-or higher-order harmonic generation of Nd:YAG, Ti:Sapphire, argon ion and alexandrite lasers.
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KTP (KTiOPO4) is a nonlinear optical crystal, which possesses excellent nonlinear, electrooptical and acoustooptical properties. A combination of high nonlinear coefficient, wide transparency range, and broad angular as well as thermal acceptance makes KTP very attractive for different nonlinear optical and wavequide applications.
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Al2O3:Ti3+ – titanium-doped sapphire crystals combine supreme physical and optical properties with broadest lasing range. It’s indefinitely long stability and useful lifetime added to the lasing over entire band of 660–1050 nm challenge “dirty” dyes in variety of applications. Medical laser systems, lidars, laser spectroscopy, direct femtosecond pulse generation by Kerr-type mode-locking – there are few of existing and potential applications.
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ß-Barium Borate (ß-BaB2O4 or BBO) is an excellent optical non-linear crystal recently developed. It exhibits broad phase matching range, high non-linearity (about 6 times more than that of KDP), high optical damage threshold, good mechanical and temperature stability. This trigonal uniaxial crystal possesses wide transparency range from 0.19 to 3.3 µm. Its useful transmission range (<5%/cm) is 0.21 to 2.1 µm and it has been demonstrated to be efficient for the generation of second harmonic radiation down to about 0.21 µm. It is also useful for broadly tunable optical parametric oscillators (OPOs) and amplifiers (OPAs). Autocorrelation applications may be performed down to 0.19um. Its exceptional IR transmission and wide thermal acceptance bandwidth allow high average power OPO/OPA operation, with minimal heating from long wavelength idler radiation.
BBO's relatively narrow angular acceptance bandwidth (especially in the UV) may limit its usefulness in certain applications involving lasers with less than diffraction limited beam quality. Its mild hygroscopicity should not limit its usefulness in most circumstances.
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Nd doped Yttrium Vanadate (Nd3+:YVO4) is one of the most effective and advanced materials for diode pumped lasers. Compactly designed Nd3+:YVO4 lasers with green, red and blue light output are really perfect means for material processing, spectroscopy, medical diagnostics, laser printing and other applications. Compared to Nd3+:YAG and Nd3+:YLF, Nd3+:YVO4 diode pumped lasers have: wide absorption bandwidth, low lasing threshold, high slope efficiency, large luminescent cross-section, linearly polarized emission and single-mode output.
Yttrium Vanadate doped with Er3+ or Yb3+ and also with a combination of Er3+, Yb3+ (YVO4:Er3+; YVO4:Yb3+; YVO4:Er3+,Yb3+) work on wavelenghts of 1.54, 1.61 µm and are used in eyesafe laser applications. In contrast to Er3+, Yb3+ doped phosphate glass, Er3+, Yb3+:YVO4 crystals can be used in CW mode with high pump energy and high efficiency. Its thermal conductivity is much higher than that of glass and this improves pump characteristics of the laser and relaxes cooling requirements. Yb3+:YVO4 has a wide absorption bandwidth at 0.98 µm and can generate with high effectivity at 1.02 µm, due to low losses of the pump energy.
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Film technologies are becoming more and more important for the development of modern sciences and technologies. The development of film technology needs various and high quality single crystalline substrates. Firstly, the cell parameter of the substrate must match with the film to be grown on the substrate and it varies well, so that only special single crystal which has certain lattice constant, correct orientation and high fabrication accuracy can be used for the film. Secondly, the substrate crystal must be structure perfectly, and the crystal structure defect such as twin and inclusion must be as few as possible. The surface of the substrate must be polished to very high flatness and micro roughness (the test result of AFM should be better than a few angstrom in an 5x5um area, for example). The substrate must be able to stand to high, low temperatures and chemical environment during the film growth and use process. Also some physical, mechanical properties are necessary for the substrate. For example, the microwave dielectric loss must be very low for the substrates used in microwave communication.
Gadolinium Gallium Garnet (GGG, Gd3Ga5O12) is a magneto-optical and microwave substrate. It is the best substrate material for infrared optical isolator (1.3 and 1.5um), which is a very important device in optical communication. It is made of YIG or BIG film on the GGG substrate plus birefringence parts. Also GGG is an important substrate for microwave isolator and other devices. Its physical, mechanical and chemical properties are all good for the above applications.
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