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Circular Grating | Flat Axicon

Transforms Gaussian beam into a Bessel-Gauss beam

Circular grating, a.k.a flat axicon, is a space-variant retarder that transforms Gaussian beam into a Bessel-Gauss beam.

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.

Technical information
Application example
References
Shipping
Grouped product items
SKU Wavelength Range, nmClear Aperture | CA, mmTransmission, %Apex AngleSubstrate MaterialDiameter, mmThickness, mmAR Coating Price
CG-343-02
343 ±20
2
>85%
UVFS (Corning 7980)
25.4
3
NO
€1,200.00
CG-343-02-AR
343 ±20
2
>90%
UVFS (Corning 7980)
25.4
3
YES
€1,650.00
CG-343-04
343 ±20
4
>85%
UVFS (Corning 7980)
25.4
3
NO
€1,400.00
CG-343-04-AR
343 ±20
4
>90%
UVFS (Corning 7980)
25.4
3
YES
€1,850.00
CG-343-06
343 ±20
6
>85%
UVFS (Corning 7980)
25.4
3
NO
€1,850.00
CG-343-06-AR
343 ±20
6
>90%
UVFS (Corning 7980)
25.4
3
YES
€2,300.00
CG-343-08
343 ±20
8
>85%
UVFS (Corning 7980)
25.4
3
NO
€2,100.00
CG-343-08-AR
343 ±20
8
>90%
UVFS (Corning 7980)
25.4
3
YES
€2,550.00
CG-343-10
343 ±20
10
>85%
UVFS (Corning 7980)
25.4
3
NO
€2,800.00
CG-343-10-AR
343 ±20
10
>90%
UVFS (Corning 7980)
25.4
3
YES
€3,250.00
CG-343-15
343 ±20
15
>85%
UVFS (Corning 7980)
25.4
3
NO
€4,850.00
CG-343-15-AR
343 ±20
15
>90%
UVFS (Corning 7980)
25.4
3
YES
€5,300.00
CG-515-02
515 ±20
2
>92%
UVFS (Corning 7980)
25.4
3
NO
€1,200.00
CG-515-02-AR
515 ±20
2
>97%
UVFS (Corning 7980)
25.4
3
YES
€1,650.00
CG-515-04
515 ±20
4
>92%
UVFS (Corning 7980)
25.4
3
NO
€1,400.00
CG-515-04-AR
515 ±20
4
>97%
UVFS (Corning 7980)
25.4
3
YES
€1,850.00
CG-515-06
515 ±20
6
>92%
UVFS (Corning 7980)
25.4
3
NO
€1,850.00
CG-515-06-AR
515 ±20
6
>97%
UVFS (Corning 7980)
25.4
3
YES
€2,300.00
CG-515-08
515 ±20
8
>92%
UVFS (Corning 7980)
25.4
3
NO
€2,100.00
CG-515-08-AR
515 ±20
8
>97%
UVFS (Corning 7980)
25.4
3
YES
€2,550.00
CG-515-10
515 ±20
10
>92%
UVFS (Corning 7980)
25.4
3
NO
€2,800.00
CG-515-10-AR
515 ±20
10
>97%
UVFS (Corning 7980)
25.4
3
YES
€3,250.00
CG-515-15
515 ±20
15
>92%
UVFS (Corning 7980)
25.4
3
NO
€4,850.00
CG-515-15-AR
515 ±20
15
>97%
UVFS (Corning 7980)
25.4
3
YES
€5,300.00
CG-1030-02
1030 ±35
2
>94%
UVFS (Corning 7980)
25.4
3
NO
€1,300.00
CG-1030-02-AR
1030 ±35
2
>99%
UVFS (Corning 7980)
25.4
3
YES
€1,750.00
CG-1030-04
1030 ±35
4
>94%
UVFS (Corning 7980)
25.4
3
NO
€1,750.00
CG-1030-04-AR
1030 ±35
4
>99%
UVFS (Corning 7980)
25.4
3
YES
€2,200.00
CG-1030-06
1030 ±35
6
>94%
UVFS (Corning 7980)
25.4
3
NO
€2,550.00
CG-1030-06-AR
1030 ±35
6
>99%
UVFS (Corning 7980)
25.4
3
YES
€3,000.00
CG-1030-08
1030 ±35
8
>94%
UVFS (Corning 7980)
25.4
3
NO
€3,250.00
CG-1030-08-AR
1030 ±35
8
>99%
UVFS (Corning 7980)
25.4
3
YES
€3,700.00
CG-1030-10
1030 ±35
10
>94%
UVFS (Corning 7980)
25.4
3
NO
€4,850.00
CG-1030-10-AR
1030 ±35
10
>99%
UVFS (Corning 7980)
25.4
3
YES
€5,300.00
CG-1030-15
1030 ±35
15
>94%
UVFS (Corning 7980)
25.4
3
NO
€7,800.00
CG-1030-15-AR
1030 ±35
15
>99%
UVFS (Corning 7980)
25.4
3
YES
€8,250.00
CG-1064-02
1064 ±35
2
>94%
UVFS (Corning 7980)
25.4
3
NO
€1,400.00
CG-1064-02-AR
1064 ±35
2
>99%
UVFS (Corning 7980)
25.4
3
YES
€1,850.00
CG-1064-04
1064 ±35
4
>94%
UVFS (Corning 7980)
25.4
3
NO
€1,850.00
CG-1064-04-AR
1064 ±35
4
>99%
UVFS (Corning 7980)
25.4
3
YES
€2,300.00
CG-1064-06
1064 ±35
6
>94%
UVFS (Corning 7980)
25.4
3
NO
€3,150.00
CG-1064-06-AR
1064 ±35
6
>99%
UVFS (Corning 7980)
25.4
3
YES
€3,600.00
CG-1064-08
1064 ±35
8
>94%
UVFS (Corning 7980)
25.4
3
NO
€5,100.00
CG-1064-08-AR
1064 ±35
8
>99%
UVFS (Corning 7980)
25.4
3
YES
€5,550.00
CG-1064-10
1064 ±35
10
>94%
UVFS (Corning 7980)
25.4
3
NO
€9,550.00
CG-1064-10-AR
1064 ±35
10
>99%
UVFS (Corning 7980)
25.4
3
YES
€10,000.00
CG-1064-15
1064 ±35
15
>94%
UVFS (Corning 7980)
25.4
3
NO
€11,800.00
CG-1064-15-AR
1064 ±35
15
>99%
UVFS (Corning 7980)
25.4
3
YES
€12,250.00

Flat axicon detailed description

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
Fast axis distribution across the element

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

Application examples

  • Micromachining

  • Ultra-high aspect ratio micro holes drilling

  • High 90% efficiency Bragg gratings

  • Cutting of transparent materials

Flat axicon application examples

  • Micromachining

  • Ultra-high aspect ratio micro holes drilling

  • High 90% efficiency Bragg gratings

  • Cutting of transparent materials

High 90% efficiency Bragg gratings formed in fused silica by femtosecond Gauss-Bessel laser beamsHigh 90% efficiency Bragg gratings formed in fused silica by femtosecond Gauss-Bessel laser beams
High 90% efficiency Bragg gratings formed in fused silica by femtosecond Gauss-Bessel laser beams
Improved laser glass cutting by spatio-temporal control of energy deposition using bursts of femtosecond pulsesImproved laser glass cutting by spatio-temporal control of energy deposition using bursts of femtosecond pulses
Improved 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 viasTailoring femtosecond 1.5-μm Bessel beams for manufacturing high-aspect-ratio through-silicon vias
Tailoring femtosecond 1.5-μm Bessel beams for manufacturing high-aspect-ratio through-silicon vias

  1. 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.

  2. He, F., Yu, J., Tan, Y. et al. Tailoring femtosecond 1.5-μm Bessel beams for manufacturing high-aspect-ratio through-silicon vias. Sci Rep 7, 40785 (2017). https://doi.org/10.1038/srep40785

  3. 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.