Purchasing Advisor for Periodically Poled Nonlinear Crystals

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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: single, 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.

See us at LASER World of Photonics 2025 in Munich, June 24–27 (hall B1, booth 258)!

Periodically poled lithium niobate (PPLN) crystal is a type of nonlinear optical crystal with distinguished high conversion efficiencies and a wide transparency range of 0.4–5 μm. The 5% MgO doping in LiNbO₃ improves the damage threshold of the PPLN to a significant extent and broadens its phase-matching bandwidth. MgO:PPLN crystals exhibit a unique quasi-phase-matching (QPM) phenomenon, which allows the utilization of a higher nonlinear coefficient than in the case of birefringent phase matching

Shalom EO offers standard and off-the-shelf MgO:PPLN crystal and waveguides for SHG of 976 nm to 2100 nm and for various up-conversion and down-conversion applications including DFG, SFG, OPO, and OPA. Different dimensions, MgO concentrations, and AR coatings are available for selection.

Engineering on Your Wavelength

See us at LASER World of Photonics 2025 in Munich, June 24–27 (booth B1.524)!

MgO:PPLN non-linear optical crystals provide high efficiency wavelength conversion in the 390nm – 6000nm range. Our proprietary PPLN poling process creates high fidelity grating periods from 3.5 μm to beyond 33 μm.

We provide stock and custom free space and fiber coupled bulk crystal solutions from one-off R&D requests to high-volume OEM manufacture with customizable options including:

• free space or fiber coupled solutions
• multiple grating, chirped or fan-out designs
• tailored AR coatings
• custom grating periods and apertures
• 2×1, 2×0, 1×1 or 1×0 fiber input/output configurations
• resistive or Peltier temperature control
• integrated or external temperature control
• broad coverage from 390nm to 6000nm.
• power monitoring, control and output filtering
• compatibility with both CW and pulsed lasers

Nonlinear crystals pioneers

See us at LASER World of Photonics 2025 in Munich, June 24–27 (booth B2.335)!

Raicol Crystals produces various periodically poled crystal materials:

• PPKTP
• PPSLT
• Mg-doped LiNbO₃ (PPLN)
• high purity aperiodically poled KTP-APKTP

With their flexible phase-matching offers, these materials find many applications e.g. in frequency doublers, sum and difference frequency mixers, and OPOs.

Change the Color of Light to Expand your Possibilities!

See us at LASER World of Photonics 2025 in Munich, June 24–27 (booth A2.303)!

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.

See us at LASER World of Photonics 2025 in Munich, June 24–27 (booth B2.303)!

G&H's Periodically-Poled Lithium Niobate nonlinear crystals allow for efficient conversion of wavelengths in the range from visible to 5 µm. The poling pattern is lithographically defined and highly customizable allowing crystals to be used in a wide range of applications that require wavelength conversion.

Phase-matching over very long propagation lengths at infrared wavelengths is possible with our congruently grown PPLN manufactured from highly uniform Z-axis wafers.

Get in touch with us to request a quote or talk to us about a solution dedicated to your OEM application.

Lasers, Optics, Electronics. Made in Germany.

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.