Del Mar Photonics - Newsletter Fall 2010 - Newsletter Winter 2010
Hexagonal modification of Lithium Iodate (a-LiIO3) is grown from the aqueous solutions. Wide transparency range combined with good non-linear, acousto-optical and piezoelectric properties makes this crystal valuable for a number of applications including laser harmonics generation and different frequency mixing to obtain tunable output at 3 - 5.4 mm. Other applications are autocorrelators, AO devices manufacturing and piezoelectric sensors. Crystal is hygroscopic and requires the protection from humidity. Another limitation can be concerned with strong dependence of some LiIO3 properties (dielectric and acoustical attenuation) on the growth conditions (pH of solution).
| Crystal Symmetry | Hexagonal | ||
|---|---|---|---|
| Point Group | 6 | ||
| Lattice Constant, Å | a = 5.4815 c = 5.1709 |
||
| Density, g/cm3 | 4.5 | ||
| Mohs Hardness | 4 | ||
| Melting Point, °C | 420 | ||
| Phase Transition Point, °C | 247 | ||
| Thermal Expansion Coefficient (10-6/K) | Z|| = 48 Z^= 28 |
||
| Optical Transmission, mm | 0.31 - 5.5 | ||
| Refractive Indices: | l, mm | no | ne |
| 0.633 | 1.8830 | 1.7367 | |
| 1.064 | 1.8517 | 1.7168 | |
| Non-linear Optical Coeff. (pm / V at 1.064 mm) | d31 = - 7.1 d33 = - 7.0 |
||
| Optical Absorption (cm-1 at 1.064 mm) | < 0.005 | ||
| Laser Damage Threshold at 1.064 mm, MW/cm2 | 250 | ||
Optical elements are cut from high quality boules grown from close to
neutral aqueous solutions. This ensures good crystal homogeneity, absence of inclusions
and absorption bands in the whole transmission range.
Optical elements sizes are up to 20 x 20 x 40 mm.
| Standard orientations are: | Type I, q = 30° for SHG 1064 nm, Type I, q = 58° for THG 1064 nm, Type I, q = 22.5° for DFM. |
|---|
Typical fabrication specs. are: 20/10 Scratch/Dig., l flatness, 1 arc. min. parallelism.
Few examples of applications of LiIO3
Lithium Iodate Crystal for second harmonic generation (SHG)
Del Mar Photonics featured optical components
Del Mar Photonics continuously expands its optical components portfolio. Browse our online store, read monthly notes about our featured optical products or just send us your requirements or product ideas.
 |
Axicon Lens Axicon lens also known as conical lens or rotationally symmetric prism is widely used in different scientific research and application. Axicon can be used to convert a parallel laser beam into a ring, to create a non diffractive Bessel beam or to focus a parallel beam into long focus depth. Del Mar Photonics supplies axicons with cone angles range from 130° to 179.5° for use with virtually any laser radiation. We manufacture and supply axicons made from BK7 glass, fused silica and other materials. buy online - download brochure |
 |
Rutile (TiO2) coupling
prisms Del Mar Photonics offers optical elements made of high quality synthetically grown Rutile Titanium Dioxide crystals. Rutile’s strong birefringency, wide transmission range and good mechanical properties make it suitable for fabrication of polarizing cubes, prisms and optical isolators. Boules having high optical transmission and homogeneity are grown by proprietary method. Typical boules have 10 - 15 mm in dia. and up to 25 mm length. Optical elements sizes - from 2 x 2 x 1 mm to 12.7 x 12.7 x 12.7 mm. Laser grade polish quality is available for finished elements. So far we the largest elements that we manufactured are 12 x15 x 5 mm, in which optical axis is parallel to 15 mm edge, 5 mm is along beam path, 12 x 15 mm faces polished 20/10 S/D, one wave flatness, parallelism < 3 arc.min. (better specs. available on request). more details - buy online - download brochure |
 |
Vacuum viewport Del Mar Photonics offer a range of competitively priced UHV viewports , Conflat, ISO or KF including a variety of coatings to enhance performance. Del Mar Photonics viewports are manufactured using advanced techniques for control of special and critical processes, including 100 percent helium leak testing and x-ray measurements for metallization control. Windows Materials include: Fused silica, Quartz , Sapphire , MgF2, BaF2, CaF2, ZnSe, ZnS, Ge, Si, Pyrex. Standard Viewing diameters from .55" to 1.94 ". Coating - a range of custom coatings can applied - which include - Single QWOT - Broad Band AR - V coatings - ITO - DLC (Diamond like coating) more details - request a quote |
 |
Manufacturing challenging optical components Our group works to characterize the interaction of biomolecules with solid surfaces, writes Dennis Hore of University of Victoria, Canada. Nature designs proteins with well-defined structures in solution. The conformation of these molecules may serve a structural purpose, or a chemical one in the case of enzymes. In order to further the progress of technologies that immobilize such molecules on synthetic surfaces (like biosensors employing enzymes), it is important to have a detailed understanding and control of the interactions of these molecules with the surface more For that project Del Mar has been able to manufacture all shapes of prisms from CaF2, fused silica, and ZnSe according to our custom specifications. Del Mar Photonics online store features windows, prisms, lenses, attenuators, etalons, crystals and wafers, and other items. Axicons, barium fluoride windows, germanium etalons, rutile (TiO2) prisms, microchannel plates and detectors, saturable absorber mirrors, photoconductive THz antennas, lithium niobate wafers and crystals and many other high quality affordable components for scientific research and OEM production are delivered globally from stock. |
 |
We are looking forward to hear from you and help you with your optical and crystal components requirements. Need time to think about it? Drop us a line and we'll send you beautiful Del Mar Photonics mug (or two) so you can have a tea party with your colleagues and discuss your potential needs |
Del Mar Photonics, Inc.
4119 Twilight Ridge
San Diego, CA 92130
tel: (858) 876-3133
fax: (858) 630-2376
Skype: delmarphotonics
sales@dmphotonics.com
If you have trouble navigating our website, just
send us a quick e-mail and we'll be happy to answer all your questions!
