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Acousto Optics

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PPLN Waveguides

Acousto-Optics » Acousto Optics

Gooch & Housego has been a leader in acousto-optic (AO) device design and manufacturing for over 35 years, bringing together some of the best minds and technologies in the field to create a comprehensive line of high-quality products backed by premier service and reliability.

It hold multiple worldwide manufacturing sites to exacting standards, from the in-house growth of our own tellurium dioxide (TeO2) to polishing, antireflection coating, fabrication and testing of devices. The result is unmatched optical power handling, and optical performance delivered consistently over time and in volume.  read more


Electro-Optics» Electro Optics

A Pockels cell alters the polarization state of light passing through it when an applied voltage induces birefringence changes in an electro-optic crystal such as KD*P and BBO. When used in conjunction with polarizers, these cells can function as optical switches, or laser Q-switches. Frequently, laser cavities incorporate Q-switches to shorten the output pulse, resulting in a light beam with enhanced peak intensity. read more


(Potassium Titanyle Phosphate – KTiOPO4)Efficiency, high damage threshold and handling easiness makes it one of the most widely preferred crystal for laser applications ,main applications are Second Harmonic Generation (SHG) in the visible and Optical Parametric Oscillations (OPO) for the tunable near infrared spectrum range.


KTP.fr» KTP.fr

It is well known that most of flux-grown KTP crystals suffer from blackening and efficiency breakdown (“grey-track”) when used during SHG process of 1064nm at high average power levels and repetition rates above 1 kHz.



(Potassium Titanyle Arsenate – KTiOAsO4) is an excellent optical non-linear crystal mainly developed for Optical Parametric Oscillation(OPO).



(Rubidium Titanyle Phosphate – RbTiOPO4) is a material now widely used for Electro Optical applications whenever switching voltages are required to be low.



(LiB3O5) is now the most popularly used material for Second Harmonic Generation (SHG) of 1064nm high power lasers (as a substitute to KTP) and Sum Frequency Generation (SFG) of 1064nm laser source to achieve UV light at 355nm.



(Beta-B2O4) has been used for years in non-linear optics (mainly for scientific applications) and electro-optics, due to its excellent damage threshold, outstanding bulk homogeneity and transmission in the UV for wavelenghts up to 200nm.


Terbium-Gallium-Garnet» Terbium Gallium Garnet

(TGG) Crystal TGG is an excellent magneto-optical crystal used in various Faraday devices (Rotator and Isolator) in the range of 400nm-1100nm, excluding 475-500nm.


LiNbO3» LiNbO3

Crystal is widely used as frequency doublers for wavelength > 1μm and optical parametric oscillators (OPOs) pumped at 1064 nm and quasi-phase-matched (QPM) devices.


Neodymium-Doped-Yttrium-Orthovanadate» Neodymium Doped Yttrium Orthovanadate

(Nd:YVO4) Nd:YVO4 is the most efficient laser host crystal for  diode pumping among the current commercial laser crystals, especially, for low to middle power density.


Neodymium-Doped-Yttrium-Aluminum-Garnet» Neodymium Doped Yttrium Aluminum Garnet 

(Nd:YAG ) Crystal Nd:YAG is the earliest and most famous laser host crystal. Since it combines great advantages in many basic properties, Nd:YAG is the ubiquitous presence for near-infrared solid-state lasers and their frequency-doubler, tripler, and higher order multiplier.


Doped-Sapphire-Crystal» Doped Sapphire Crystal

(Ti:Sapphire) Titanium doped Sapphire (Ti:Sapphire) is the most widely used laser crystal for widely tunable and ultrashort pulsed lasers with high gain and high power outputs.  Er:YAG is an excellent laser crystal which lases at 2.94 μm.


Chromium-Doped-Yttrium-Aluminum-Garnet-Crystal» Chromium Doped Yttrium Aluminum Garnet Crystal

(Cr4+:YAG) Cr4+:YAG Crystal is an excellent crystal for passively Q-switching diode pumped or lamp-pumped Nd:YAG, Nd:YLF, Nd:YVO4 or other Nd and Yb doped lasers at wavelength from 0.8 to 1.2 µm.

» Nd:YLF Crystal CASTECHgrowsNd:

YLF crystals using Czochralski method.The use of high quality starting materials for crystal growth, whole boule interferometery, and precise inspection of scattering particle in crystal using He-Ne lsaer assures that each crystal will perform well.

Electro-Optics» PPLN Waveguides

Our PPLN waveguides facilitate highly efficient and cost-effective frequency conversion, providing a route to accessing wavelengths that are presently unavailable from commercial laser sources.read more

Select from our range of PPLN waveguide chips for the highest conversion efficiencies or our packaged PPLN waveguides for instant connectivity and rapid integration.

The new Covesion Waveguide product range includes:

  1. – Standalone Waveguide Chips
  2. – Ruggedized Waveguide Package with APC fiber connectors
  3. – Component Waveguide. Fiber input with optional fiber or free space output.


» Custom PPLN

Our expertise and novel poling technology provides a versatile basis for the design and manufacture of unique PPLN crystals.read more


Key features of Custom PPLN:

  1. – Magnesium-doped PPLN
  2. – Poled periods: 3µm – 37µm(+)
  3. – Crystal lengths: 0.3mm – 50mm
  4. – Grating width: 0.5mm – 6mm
  5. – Multiple different poled periods in a single crystal
  6. – Variable grating aperture and spacing
  7. – Various crystal thicknesses
  8. – Custom optical coatings
  9. – Flexible service; one-off crystals to large scale production
  10. – Technical consultation and advice
  11. – Crystal modeling and design service
  12. – PPLN crystals from stock


» MgO:PPLN Bulk Crystals

Our Magnesium-doped Periodically Poled Lithium Niobate (MgO:PPLN) crystals offer high efficiency wavelength conversion for visible and mid-infrared applications.read more


Key features of MgO:PPLN Crystals

  1. – Multi-band AR coated
  2. – Flatness <λ/4@633nm
  3. – Parallel to ±5 minutes
  4. – Better than 70:30 mark-to-space ratio
  5. – Polished to 20-10 scratch dig
  6. – Fewer than two 100μm edge chips per facet


» PPLN Accessories

Choose from our specially designed clips, ovens, temperature controllers and mounting accessories to make our PPLN crystals easy to use.read more