Workshop of Photonics

Workshop of Photonics has circular gratings, also known as flat axicons, are space-variant retarder plates that can transform Gaussian beams into Bessel–Gauss beams.

Main features:

• flat optics – saves space, easy to handle
• positive and negative Bessel–Gauss zones – 3 in 1 usage possibilities
• suitable for high-power lasers (high damage threshold)
• reliable and resistant surface – the structure is inside the bulk piece

WOP offers beam shapers for various applications. Our circular grating / flat axicon is a space-variant retarder that transforms a Gaussian beam into a Bessel-Gauss beam.

Main features:

• converts Gaussian beam to a flat-top beam
• high damage threshold: 63.4 J/cm² at 1064 nm, 10 ns and 2.2 J/cm² at 1030 nm, 212 fs
• wavelength range from 300 nm to 2 μm
• conversion efficiency up to 70% (wavelength-dependent)
• large aperture (up to 15 mm; standard is 6 mm)

This device is made 100% suitable for your application – designed according to your laser beam specifications.

WOP offers custom-made space variant retarders – adapted to the specific end-user needs. Space-variant retarders (SVR) fabrication is based on the inscription of self-organized nanogratings inside fused silica glass using a femtosecond laser.

Main features:

• wavelength range from 200 nm to 3500 nm
• high damage threshold: 63.4 J/cm² at 1064 nm, 10 ns and 2.2 J/cm² at 1030 nm, 212 fs – suitable for high LIDT applications and high-power lasers
• 94% transmission at 1030 nm (no AR coating)
• aperture size from 1 mm to 15 mm
• reliable and resistant surface – the structure is inside the bulk piece
• custom-designed fast axis and retardance patterns

WOP offers ultrashort pulse laser cutting services, ensuring ultra-high quality and precision on diverse materials – hard, fragile, soft, transparent, non-transparent, tempered, non-tempered, etc. The femtosecond laser together with our know-how ensures straight and circular cuts, smooth edges, no cracks.

We have extensive knowledge of processing for a variety of materials, like:

• glass cutting and dicing
• sapphire cutting and dicing
• polymer cutting
• thin film / foil cutting.

WOP offers diffractive optical elements for THz frequencies – various types of custom elements suitable for your specific THz wave manipulation applications.

The terahertz frequency range ranges from 0.1 THz to 10 THz in an emerging wide research field with multiple applications – from communication to optical imaging or spectroscopy. Various materials such as semiconductors, metals, polymers, or plastics can be used as functional materials. One of the key applications is THz optical imaging which enables seeing through transparent and opaque materials. Ultrashort pulse laser processing is used as a precise tool to manufacture diffractive and custom optical elements.

See also our white paper on Terahertz structured light: nonparaxial Airy imaging!

WOP offers fabrication services for optical fiber alignment arrays (1D, 2D micro-hole arrays). Laser micromachining, together with SLE which we use for fiber alignment structures production, offers definite advantages in terms of precision, consistency, speed, material versatility, and cost-effectiveness.

Using our laser micromachining method, critical features such as tight tolerances, tight positional accuracies, and hole diameter – within the tolerance of ±0.25 μm – can be achieved. This tight control of metrics ensures well-controlled alignment that might reduce insertion loss and provide good repeatability.

Moreover, this method enables forming the hole entrance as a funnel, step profile, or with a conical taper for easy fiber insertion. The channels can be straight or angled (like 8̊ ).

WOP can offer a wide range of laser applications based on our femtosecond laser systems:

• Laser micro drilling.
• Laser micro cutting.
• Selective laser induced etching | SLE.
• Laser welding.
• Volume modifications – waveguide writing and FBG writing.
• Surface structuring.
• Laser micro marking.
• MPP = multiphoton polymerization.

The FemtoGLASS is a new glass and sapphire laser cutting and dicing workstation ideal for research and development, and for volume manufacturing. It is based on patented WOP glass and sapphire cutting technology, which is unique for ultra-high quality and precision results. Our technology outperforms other glass-cutting methods and thus is very well applicable in semiconductors, microfluidics, and micro-optics industries.

Features:

• ultra-fast thin (30 µm to 3 mm) glass and sapphire cutting
• high process speed – up to 1000 mm/s
• various shapes cutting – circular, square, irregular
• inner and outer contours
• easy breaking for non-tempered glass and self-breaking for tempered glass

FemtoFAB is a turnkey laser workstation designed for a specific industrial process – highly reliable, offers significant advantages in high speed, ultra-high precision, melt-less micromachining.

Main features:

• high fabrication speed – up to 300 mm/s (more on request)
• fabrication of complex objects with submicron resolution
• high-performance galvanometer scanners
• pulse density control
• precise object positioning with submicron accuracy
• object movement and laser pulse synchronization in time and space
• unique software interface controlling all hardware units

WOP offers ultra-high precision femtosecond laser micromachining workstations for industry and science needs. We design and manufacture tailor-made laser systems for your custom laser micromachining applications:

• FemtoLAB – all-in-one R & D platform for laser micromachining. Perfect choice -for universities and R & D centers
• FemtoGLASS – glass and sapphire laser cutting and dicing workstation ideal for research and development, and volume manufacturing.
• FemtoFBG – laser micromachining workstation optimized for Fiber Bragg Grating (FBG) writing
• FemtoMPP – laser micromachining workstation optimized for multiphoton polymerization (MPP) technology
• FemtoFAB – highly reliable, ultra-high precision industrial laser micromachining workstation

WOP offers ultra-high precision femtosecond laser micromachining workstations for industry and science needs. We design and manufacture tailor-made laser systems for your custom laser micromachining applications:

• FemtoLAB – all-in-one R & D platform for laser micromachining. Perfect choice -for universities and R & D centers
• FemtoGLASS – glass and sapphire laser cutting and dicing workstation ideal for research and development, and volume manufacturing.
• FemtoFBG – laser micromachining workstation optimized for Fiber Bragg Grating (FBG) writing
• FemtoMPP – laser micromachining workstation optimized for multiphoton polymerization (MPP) technology
• FemtoFAB – highly reliable, ultra-high precision industrial laser micromachining workstation

See also our white paper on Focal zone engineering with hollow spatially variable waveplates applicable in laser micromachining!

WOP offers polarization converters which are exceptional for their ultra-high damage threshold, suitable even for high-power lasers.

S-Waveplate converts linear polarization to radial or azimuthal polarization and circular polarization to an optical vortex.

Main features:

• converts linear polarization to radial or azimuthal polarization
• converts circular polarization to an optical vortex
• high 94% transmission at 1030 nm (no AR coating)
• stand-alone – no additional optical elements needed
• high damage threshold: 63,4 J/cm² at 1064 nm, 10 ns and 2,2 J/cm² at 1030 nm, 212 fs
• suitable for high LIDT applications and high-power lasers
• reliable and resistant surface – the structure is inside the bulk

Additional waveplate assortment:

• higher order S-Waveplate: converts linear polarization to higher-order polarization patterns
• custom waveplate: enable patterned polarization control at the specific point of the laser beam