ORISANDO® Circular Grating, a.k.a Flat Axicon, is a space-variant retarder that transforms Gaussian beam into a Bessel-Gauss beam.
ORISANDO® is a new brand and an e-shop for space-variant retarders, developed by WOP | Workshop of Photonics® in 2025.
Circular grating | flat axicon is leading for its high damage threshold, comparing to alternative devices. It has laser irradiation resistance similar to uncoated fused silica substrates.
The structure of the element is unique due to formation birefringent nanograting’s inside a bulk of fused silica glass, sensitive to the incident polarization.
Main features
Positive and negative Bessel-Gauss zones – 3 in 1 usage possibilities.
Suitable for high LIDT applications and high-power lasers.
Flat optics – saves space, easy to handle.
Reliable and resistant surface – the structure is inside the bulk.
Circular grating | flat axicon is leading for its high damage threshold, comparing to alternative devices. It has laser irradiation resistance similar to uncoated fused silica substrates. The structure of the element is unique due to formation birefringent nanograting’s inside a bulk of fused silica glass, sensitive to the incident polarization.
Circular grating can generate both – positive and negative Bessel-Gauss zones, separately with LHCP and RHCP polarizations. Also, positive and negative zones simultaneously with linear polarization. The working regime depends only on incident polarization.
Positive Bessel-Gauss zone
Negative Bessel-Gauss zone
Positive and negative Bessel-Gauss Zone
Flat axicon technical features
Material: UVFS, IRFS
Wavelength range: 330nm to 2000 nm
Min Apex angle: 176-179.9° @1030 nm
Diffraction efficiency: up to 95%
Element size: up to 15 mm
Coating (optional): AR/AR coating
Uncertainty of diameter of cone tip – ~20 µm
LIDT | High damage threshold: 63 J/cm2 @1064 mn, 10ns; 2 J/cm2 @1030 nm, 212fs
Transmission (no AR coating): 85% @343 nm, 92% @515 nm, 94% @1030 nm | 99% with AR
High 90% efficiency Bragg gratings formed in fused silica by femtosecond Gauss-Bessel laser beamsImproved laser glass cutting by spatio-temporal control of energy deposition using bursts of femtosecond pulses
Tailoring femtosecond 1.5-μm Bessel beams for manufacturing high-aspect-ratio through-silicon vias
Mikutis, Mindaugas & Kudrius, Tadas & Slekys, Gintas & Paipulas, Domas & Juodkazis, Saulius. (2013). High 90% efficiency Bragg gratings formed in fused silica by femtosecond Gauss-Bessel laser beams. Optical Materials Express. 3. 1862-1871. 10.1364/OME.3.001862.
He, F., Yu, J., Tan, Y. et al. Tailoring femtosecond 1.5-μm Bessel beams for manufacturing high-aspect-ratio through-silicon vias. Sci Rep7, 40785 (2017). https://doi.org/10.1038/srep40785
Mishchik, Konstantin & Beuton, R. & Dematteo Caulier, Ophélie & Skupin, Stefan & Chimier, Benoît & Duchateau, Guillaume & Chassagne, Bruno & Kling, Rainer & Hönninger, Clemens & Mottay, Eric & Lopez, John. (2017). Improved laser glass cutting by spatio-temporal control of energy deposition using bursts of femtosecond pulses. Optics Express. 25. 33271-33282. 10.1364/OE.25.033271.
All items listed on the website are custom-made after we receive your order and payment.
The fabrication process typically takes 2 to 4 weeks, depending on the specific item ordered. If you choose the AR coating option, an additional 2 weeks will be added to the delivery timeframe.
The final delivery date will be provided in the quotation.
Pricing information and shipping durations will be displayed once you select your address.
