Covesion

Our range of PPLN ovens are specifically designed to provide robust thermal management of PPLN crystals.

All of our crystals are supplied clip-mounted, ready for use in our ovens. The clips are easily positioned into the oven using the auto-locating pins, allowing the PPLN clips to be swapped with minimal realignment of the optical train. Finely sprung pins in the oven lid hold the PPLN crystal clip securely in place. The oven and PPLN crystal can then be mounted in any orientation, flexible to your choice of optical arrangement.

We also offer temperature controllers for use with our crystal ovens.

Covesion manufactures stock and custom free space and fiber coupled tailored to your SHG requirements. Our up-conversion solutions offer exceptional conversion efficiency for Second Harmonic Generation (SHG) of IR to visible and shorter near-IR wavelengths.

Our custom capabilities include:

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

Non-linear Optical (NLO) crystals provide an enormously flexible solution for generating new wavelengths from existing, off-the-shelf laser sources. The optical wavelength spectrum is utilized by a large and continually expanding variety of applications, from manufacturing of medical lasers, quantum networking & computing through to environmental sensing as well as many others.

With its high non-linear coefficient, ability to be periodically poled and broad optical transmission, MgO:PPLN becomes a highly flexible solution for the generation wavelengths from the blue (400 nm) through the mid-IR and beyond (THz).

See also our white paper on Wavelength Engineering Using Non-Linear Optical Crystals!

MgO:PPLN provides a highly efficient and reliable solution of generating wavelengths and power levels not commercially available from standard laser diodes. Covesion poling technology and high-quality packaging designs provide a versatile basis for the design and manufacture of unique PPLN solutions with a range of customizable options including:

• free space or fiber coupled solutions
• multiple grating, chirped or fan-out designs
• tailored AR coatings
• custom grating 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 390 nm to 6000 nm
• power monitoring, control and output filtering
• compatibility with both CW and pulsed lasers

Lithium niobate is a ferroelectric material in which the domain structure can be inverted by application of an electric field. By applying a spatially patterned electric field, so called periodic poling, a periodic reversal in the in-built polarization can be produced within the crystal.

Doping PPLN with 5% MgO significantly increases the optical and photorefractive resistance of the crystal while preserving its high nonlinear coefficient allowing for broader temperature tuning of the device, increased wavelength tunability and increased power handling capabilities of the device.

This broad wavelength tuneability means PPLN can be used for a range of applications from microscopy to quantum communication.

Researchers have used MgO:PPLN crystals to build a compact and dependable, tunable, CW seeded synchronization-free OPA with a robust, commercial pico-second pump laser.

Utilizing our knowledge and experience in poling techniques, Covesion can offer a variety of stock and custom free space bulk crystal solutions for amplifying low power near-IR CW seed lasers for applications such as spectroscopy and environmental monitoring.

Our custom design capabilities include:

• multiple grating, chirped or fan-out designs
• tailored AR coatings
• custom grating periods and apertures
• compatibility with both CW and pulsed lasers

The large nonlinear coefficient of PPLN and broad transparency range allows researchers and OEM’s to efficiently generate mid-IR wavelengths from a variety of visible and near-IR wavelengths.

Utilizing our knowledge and experience in poling techniques, Covesion can offer a variety of free space bulk crystal solutions for single pass OPG to generate mid-IR wavelengths from visible and near-IR pump lasers for applications such as mid-IR spectroscopy.

Our custom capabilities include:

• multiple grating, chirped or fan-out designs
• tailored AR coatings
• custom grating periods and apertures
• broad mid-IR coverage
• compatibility with both CW and pulsed lasers

One of the most common uses of PPLN is in an Optical Parametric Oscillator (OPO). Nd:YAG pumped OPOs based on PPLN can efficiently produce tunable light at wavelengths between 1.3 and 5 μm and can even produce light at longer wavelengths but with lower efficiency. The PPLN OPO can produce output powers of several watts and can be pumped with pulsed or CW pump lasers.

Covesion offers a variety of free space bulk crystal solutions for multi-pass OPO to generate mid-IR wavelengths from visible and near-IR pump lasers for applications such as mid-IR spectroscopy and environmental monitoring.

Our custom capabilities include:

• multiple grating, chirped or fan-out designs
• tailored AR coatings
• custom grating periods and apertures
• broad mid-IR coverage
• compatibility with both CW and pulsed lasers

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

Covesion’s MgO:PPLN free space and fiber coupled up- and down-conversion solutions offer exceptional conversion efficiency for generating visible and mid-IR wavelengths through sum and difference frequency generation.

We can offer a range of custom free space and fiber coupled solutions suitable for one-off orders to large-volume 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 or 2×0 fiber input/output configurations
• resistive or Peltier temperature control
• integrated or external temperature control
• broad coverage of visible and mid-IR wavelengths
• power monitoring, control and output filtering
• compatibility with both CW and pulsed lasers

Covesion manufactures a range of resistive and Peltier temperature control solutions from benchtop units to custom electronics for OEM integration.

Our custom capabilities include:

• PCB or encased or integrated solutions
• LabView or Python drivers
• resistive or Peltier temperature control
• temperature control from –200ºC to 350ºC
• up to 0.001°C stability
• 0 – 24 V TEC drivers, rated at 5 – 15 A output current
• wide range of sensor options; RTD Pt100, Pt1000, thermistor, LM35, AD590, LM335 etc.
• wide range of interface options: USB, RS232, RS485, Ethernet, etc.

Covesion’s MgO:PPLN waveguide solutions provide high efficiency for SHG and SFG wavelength conversion processes. Ideal for a wide range of pump sources, these solutions offer robust performance from femtosecond to continuous wave applications, ensuring reliable and versatile frequency conversion for both scientific research and industrial applications.

We offer a range of free space and fiber coupled solutions for one-off orders to large-volume manufacture with customizable options including:

• free space or fiber coupled solutions
• tailored AR coatings
• 2×1, 2×0, 1×1 or 1×0 fiber input/output configurations
• resistive or Peltier temperature control
• integrated or external temperature control
• custom wavelength coverage
• power monitoring, control and output filtering
• compatibility with both CW and pulsed lasers