Potassium Titanyl Phosphate - KTP
4Pages

Potassium Titanyl Phosphate - KTP Potassium Titanyl Phosphate (KTP or KTiOPO4) is a nonlinear optical material suitable for use in many optical systems. Its most popular application is as a frequency doubler utilizing the 1064nm output of a Nd:YAG laser. The conversion efficiency to 532nm is up to 60% at 250 MW / cm2. KTP’s properties also make it superior as an electro-optic modulator, optical parametric generation and optical waveguiding. SYNOPTICS has spent many years on the crystal growth and development of KTP. Applications KTP’s unique combination of properties, high nonlinear coefficients, high damage threshold, and the fact that it is non-hygroscopic as well, suit it to those laser systems applications requiring high power, high efficiency, and/or durability. It can be used in both commercial and military lasers including medical and laboratory systems, range-finders, designators and systems for use in the semiconductor industry. Any export or re-export of this product requires U.S. Government approval. Crystal Growth SYNOPTICS’ growth of KTP for nonlinear applications utilizes the hydrothermal process. In this technique crystals are grown in seeded aqueous solutions of KTP at elevated pressures and temperatures. Seed orientation makes use of the growth directions perpendicular to the (011) face. Typical crystal sizes of 15 x 20 x 40 mm are obtained using this techniq

Crystal Structure Structurally, Potassium Titanyl Phosphate (KTP) is orthorhombic and belongs to the acentric point group mm2. Its complicated structure is characterized by chains of TiO6 octahedral linked at two corners by alternating long and short Ti-O bonds. The analysis of Zumsteg et al indicates that it is primarily these short Ti-O bonds that give rise to the large nonlinear optical effects observed in KTP. Some of the more useful physical properties of the material are given in Table I. Physical Chemical Properties Formula: Crystal Structure: Lattice Parameters: Melting Point: Mohs...

Potassium Titanyl Phosphate - KTP Introduction Potassium Titanyl Phosphate (KTiOPO4’KTP) - was first synthesized in 1890 by L. Ouvard but it wasn’t until the 1970’s that Zumsteg, Bierlein and Gier at E.I. DuPont identified the nonlinear optical properties of this crystal. These properties proved to be extremely desirable for several solid state laser applications. In the late 1970’s, SYNOPTICS joined forces with DuPont to pursue the advanced development of this material. Since then, SYNOPTICS has spent many years developing the crystal growth and fabrication of KTP, and today, at our...

This material is also well suited for use as an optical parametric oscillator (OPO). KTP’s wide tuning range and high conversion efficiencies mean that short crystals can be used in this application. Another application well suited for KTP is quasi phase matching (QPM). In this process z-oriented waveguides of KTP are periodically poled and pumped with diode lasers to generate blue to near UV wavelengths.* Electro-Optical (E-O): KTP possesses E-O properties comparable to those of LiNbO3 for bulk modulator applications with a figure of merit (n7r2/ ) of 3650 (pm/v)2. KTP is also a superior...