Ultra-thin waveplate for optical communication

Arrows indicate optical axes.
  • Ultra-thin waveplate with thickness less than 20 micron
  • Multiple optical axes on a single element
  • Operation range for C band or L band in optical communication
  • Can be inserted into a groove of PLC (Planar Lightwave Circuit) with low loss
  • Suitable for use in optical coherent system such as optical transceiver, optical modulator, receiver, and WSS (Wavelength Selective Switch).
  • Suitable for miniaturization in both spatial beam optics and planar lightwave circuits

True Zero-order Waveplate

True zero order waveplates have generally less sensitivity to variations of the angle of incidence or the wavelength.

The characteristics are suitable for many applications, such as telecommunications,
Conventional true zero order waveplates can be fabricated following traditionnal techniques, by polishing quartz plates to a very-thin thickness, such as the retardance becomes zero-order. The plates obtained with this technique are very fragile (thickness: ~90 µm), thus difficult to handle.
On the other hand, our photonic crystal waveplates are stacked on a silica substrate, which thickness is 0.5 or 1 mm (standard specs).
That is why they can be handling the exact same way as conventional optical filters, without any special equipment. They can still be made ultra-thin (even thinner that quartz zero-order plates: ~20 µm), but removing the substrate, if the application needs it (elements to be inserted in ultra-thin slots of highly integrated optical circuits, etc.). You get then the best of both worlds!

By using the photnic crystal waveplates,you get both the high qualityof true-zero order waveplates and easiness of use.

High reliability

The elements are made of Niobium oxide and Silicon oxide coated on a silica substrate.
They are heat-proof up to a temperature of at least 400 °C (Celsius) and have very good reliability.


Multi-segment waveplate
The elements are can be segmented, on a monolithic substrate. Each segment can have a different axis but there is no dead zone at the contact between two segments, nor any "manual assembly", or "gluing" between the segments when manufactured.
The design of the segments is very flexible, so any pattern can be made available for the exact needs of the final application.
(⇒ Autocloning)
Any question or request is welcome:
(⇒ Customize)


If another specs are requested, the element can be customized to meet your needs.
Please note that technical specifications are subject to change without notice.
Insertion loss< 0.1dB @1550nm
Ripples inTransmittance< 0.1dB (max-min) @1520-1570nm
Retardance@1520-1570nm : 90 deg. or 180 deg. (± 9 deg.)
Angle of incidenceNormal ± 10deg.
Clear Aperture, Outer size---
MaterialsNb2O5/SiO2(multilayer) Silica(substrate)