Where to Buy Periodically Poled Nonlinear Crystals

Periodically poled lithium niobate: magnesium-doped PPLN is ideal for innovative laser applications due to its high effective nonlinear coefficient; allowing for high efficiency frequency conversion across multiple different mechanisms.

Covesion is a world leader in the design and manufacture of periodically poled lithium niobate for non-linear frequency conversion. MgO:PPLN crystals are available for high efficiency SHG, DFG, SFG and OPO interactions. Wavelength generation coverage runs from visible to mid-IR.

Periodic poling allows for quasi phase matching, which maintains phase relation of the photons throughout the crystal where they would otherwise fall out of phase. This engineered effect leads to a much higher conversion efficiency than would be found in the regular crystal.

Readily available stock crystals and waveguides can be provided on short timescales to rapidly meet your application needs, providing the capability to generate laser light in a wide range of wavelengths.

Periodically poled nonlinear crystals PPKT and PPLN for specific wavelengths in the infrared for frequency doubling are available from stock. The lower wavelength limit of our PPKTP for frequency doubling is 976 nm.

HC Photonics (HCP) provides various high efficiency nonlinear crystals to enable full-spectrum applications, including periodically poled lithium niobate (LiNbO₃)/PPLN and periodically poled lithium tantalate (LiTaO₃)/PPLT.

Features and service:

• More than 250 commercial off-the-shelf PPMgO:LN bulk crystals for wavelength conversions: QPM pattern: single, multiple, and fan-out; configuration: SHG, SFG, DFG, OPG, OPO, OPA; wavelength range: UV (355 nm) to mid-infrared (5000 nm)
• Custom-made solutions: QPM period: 2–1000 microns; QPM pattern: sngle, multiple, fan-out, chirped, cascade, 2D; dimension: length 0.3–80 mm, width 0.1–40 mm, thickness 0.2–5 mm); configuration: SHG, SFG, DFG, OPG, OPO, OPA, THG, SHG+SFG; wavelength range: UV (355 nm) to mid-infrared (5000 nm) and THz; material: PPMgO:LN or PPMgO:LT
• PPLN waveguides: excellent performance, i.e. >50% overall efficiency. Fibered module >2 W at 780 nm ( 1560 nm SHG) is off-the-shelf. Other wavelengths are also available or could be designed upon request.

Periodically poled lithium niobate (PPLN) waveguides are a type of high efficiency nonlinear optical crystals, which cover a extremely wide wavelength conversion spectral range of 0.4 μm to 5.0 μm. The 5% MgO doping in LiNbO₃ increases the optical resistance of the crystals and significantly improves its damage threshold.

Shalom EO offers MgO:PPLN waveguide chips for SHG of 976 nm, 1029 nm, 1064 nm, 1545 nm, 1550 nm, 1560 nm and 2100 nm. Products for SFG, DFG and OPO applications are also available. Both off-the-shelf and custom waveguides are provided.

GWU offers periodically poled lithium niobate (PPLN) crystals with highest quality for quasi-phase matching (QPM). The sophisticated manufacturing process allows for the engineering of PPLN crystals tailored for arbitrary frequency conversion processes for full spectrum applications, covering SHG, SFG, THG, DFG, OPG, OPA and OPO. Many standard crystals are available off-the-shelf for fast shipping.

PPLN crystals can be combined with waveguide structures to enhance the conversion process, yielding high efficiency especially in weak light applications.

For maximum user convenience, our PPLN crystals are available in a robust and ready-to-use package: the PPLN Mixers. Besides being plug & play devices, the Mixers are widely customizable in wavelength and are available in free-space or fiber-coupled configurations.