KTP Crystals
Potassium Titanyl Phosphate (KTiOPO3 or KTP) Crystals are a versatile kind of optical crystals. The advantages of KTP crystals include high non-linear coefficient and damage threshold, wide acceptance angle, substantial temperature-stable phase-matching characteristics, and non-hygroscopicity. These traits, combined with its excellent transmission in the visible and near-IR wavelength range, have built up their prevalence in the field of Nonlinear Optics (NLOs). KTP crystals could be utilized in the Second Harmonic Generation (SHG) of Nd:YAG lasers. When Shalom's KTP is applied outside the cavity of a 900mJ injection-seeded Q-switch Nd: YAG laser, the resultant output is a 700mJ green laser, suggesting a high conversion efficiency of over 80%. Other applications include OPO/OPA/OPG to obtain 600nm-4500nm light output and SFM.
On the other hand, KTP crystals also manifest promising Electro-Optical properties, including great electro-optical coefficients and low dielectric constants, etc. Because KTP crystals virtually produce no parasitic oscillation, the crystals are attractive options for manufacturing EO modulators, Q-switches, EO deflectors, waveguides, etc.
Hangzhou Shalom EO offers off-the-shelf and custom KTP Crystals with various coating options and rigorous QC inspection, and manifold apertures values up to 40x40mm are available. Standard coating options include: AR, HR, HT, and PR dual-wavelength coatings for SHG, other custom coatings could also be tailored. For applications with higher power levels, High Gray Track Resistance (HGTR) KTP crystals are also procurable in Shalom EO.
Applications of KTP Crystals:
Second Harmonic Generation:
KTP crystals are especially the best media for the SHG of solid-state green lasers, which are currently becoming favored as pumping sources and amplifiers for visible dye lasers and tunable Ti: Sapphire lasers. With a 900mJ injection-seeded Q- Q-switch Nd:YAG lasers using extra-cavity KTP, the resultant output would be a 700mJ green laser, indicating a conversion efficiency above 80%. However, due to the susceptibility to gray-tracking of the crystals in high-power operation, usually, the crystals are only applied when the power density is low/medium.
OPO, OPG, and OPA:
KTP is also used as a parametric source providing tunable output in the visible (600nm) to MIR (4500nm) wavelength range. One of the most favorable ways to accomplish extremely efficient conversion is to use tunable laser pumped non-critical phase-matched (NCPM) KTP OPO/OPA. KTP OPO delivers steady continuous femtosecond pulses with a 108Hz repetition rate and milli-watt average power density, in both signal and idler outputs.
EO Modulations:
KTP possesses potential E-O and dielectric properties that are equivalent to LiNbO3, in addition to its distinctive NLO features. KTP's advantageous qualities make it ideal for a variety of E-O devices.
Optical Waveguides:
Planar low-loss optical waveguides could be developed on the basis of KTP crystals using the technique of ion implantation. In the field of integrated optics, there has rising interest in KTP crystals. According to research, implantation of He+ ion in KTP crystals could obtain a barrier layer of 2um thick, with significant changes in the refractive index, proving the great potential for KTP-based waveguides.
