Apart from real ultraviolet lasers, there are ultraviolet laser sources based on a laser with a longer wavelength (in the visible or near-infrared spectral region) and one or several nonlinear crystals for nonlinear frequency conversion. Some examples:

Catadioptrictelescope

GWU-Lasertechnik has more than 30 years of experience in lasers and non-linear optics. We are the pioneer of commercial BBO OPO technology. Our widely tunable laser sources cover especially the UV and deep-UV range down to a wavelength of <190 nm. We offer pulsed solutions for nano-, pico- and femtosecond pulses with best performance and highest reliability. Our rugged and thoroughly tested all-solid-state Laser technology does not require any consumable supplies and is thus providing most convenient usability, longest lifetime and excellent total costs of ownership. With a vast flexibility and a huge versatility, GWU’s laser products can serve the needs even for the most demanding scientific and industrial applications.

The CARBIDE 50 W UV laser is based on the market-proven industrial-grade CARBIDE laser platform. It emits 500 fs pulses at a 343 nm wavelength and fits into a footprint of 84 × 35 cm, making it the most compact 50 W UV femtosecond laser currently available on the market. The CARBIDE ensures long-term performance without the need for user intervention. Its high power allows for beam splitting into multiple parts, enabling parallel micromachining processes and subsequently increasing throughput. The CARBIDE platform ensures simple integration into industrial 24/7 workstations.

Their innovative optical design, based on a catadioptric system, makes it possible to image objects of different diameters, ranging from 7.5 mm to 110 mm.

Catadioptricpronunciation

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TOPTICA provides lasers in the UV range from 190 nm – 390 nm. Proprietary technology and high-end clean room manufacturing capabilities enable stable long-term operation at all wavelengths.

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Many applications benefit from central wavelengths in the VIS or UV range. AFS offers fully integrated frequency conversion modules from 1030 nm to 515 nm, 343 nm or even 258 nm. The conversion efficiency depends on the pulse duration of the driving laser. We offer fourth-harmonic generation upon request.

Catadioptrictelescope advantages and disadvantages

Compared to infrared and visible laser sources, ultraviolet laser sources tentatively have more problems with limited device lifetimes. This is essentially because various optical materials (e.g. laser crystals, nonlinear crystals and optical elements) exhibit degradation effects initiated by absorption of ultraviolet light. Another sometimes encountered problem is that hydrocarbons, resulting e.g. from out-gasing of lubricants of mirror mounts, are decomposed by ultraviolet light, which can lead to the deposition of black soot on optical elements. Such issues need to be carefully treated in the product development in order to realize the basic potential for long lifetimes of a particular laser type.

Catadioptrictelescope disadvantages

The IPEX-700 series is designed for medium duty cycle operation in industrial and R & D environments. These lasers deliver high power ultraviolet laser machining combined with state-of-the-art performance. They are ideal for applications such as pulsed laser deposition.

Ultraviolet laser sources involve some special safety hazards, mostly related to the risks of eye damage and causing skin cancer. The article on laser safety gives some details.

CatadioptricTelescope Price

Ask RP Photonics for advice e.g. on nonlinear frequency conversion for UV generation. RP Photonics has powerful software for example for calculating all phase-matching options with various nonlinear crystal materials.

Catadioptrictelescope diagram

with pulse durations from picoseconds (PICOPOWER series) to sub-nanoseconds and nanosecond (PULSELAS-A/P series). While the passively Q-switched sub-nanosecond microchip UV lasers are the best alternative for low-cost and maintenance-free operation, the harmonically tripled and quadrupled regeneratively amplified picosecond lasers offer very high peak powers for material processing and nonlinear optical applications.

The IPEX-800 series is designed for high duty cycle operation in a manufacturing environment. These lasers deliver high power ultraviolet laser machining combined with state-of-the-art performance. They offer long gas lifetimes, superior optical stability and precise control of laser operating parameters. Easy to use, simple to service and economical to operate, they combine the benefits of high precision excimer processing with the lowest total cost of ownership and highest uptime in the market today.

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LightMachinery excimer lasers are powerful and reliable sources for ultraviolet light. They now feature exciPure™ technology, introduced in 2016; exciPure represents the greatest improvement in excimer gas lifetime and reduction in operating costs in a generation.

Sacher Lasertechnik also offers the Jaguar UV laser, a MOPA system with fourth harmonic generation for output wavelengths from 205 nm to 270 nm.

The compactness and high resolution of these lenses make them ideal to inspect components like pharmaceutical containers, plastic caps, pre-forms, bottlenecks, screws and other threaded objects.

HÜBNER Photonics offer UV lasers in the Cobolt 05-01 and 06-01 Series, emitting at 355 nm (single-frequency or Q-switched)) or 375 nm (a continuous-wave diode laser).

The image of the external walls of the object, captured through the catadioptric system, is inscribed into the short side of the camera detector within a circular crown. On the other hand, the top of the object is directly imaged onto the central part of the detector area: both the lateral and top view of the object are in perfect focus at the same time.

Serving North America, RPMC Lasers offers a wide range of ultraviolet laser diodes and DPSS lasers between 200 nm and 389 nm. We offer pulsed and CW lasers and modules, available with output powers from 1 mW up to 20 W, pulse energy from 200 nJ up to 35 mJ, and free-space & fiber-coupled output options, as well as packaging options at all levels of integration from TO can through turnkey systems. Standard and custom options available. Let RPMC help you find the right laser today!

For higher peak powers, we offer the 266 nm PNU-M01210-1x0 lasers, part of the Powerchip series, also available with various wavelengths including 355 nm, 266 nm and 213 nm. Peak powers of tens of kilowatts (or even 160 kW at 1064 nm) are generated, while the pulse durations are always well below a nanosecond. These lasers use a specific long life process to extend lifetime between refurbishments.

By replacing the pre-assembled protective window on PCCD0xx, PCCD2M and PCCDL lenses with the PCCDLFAT interchangeable attachment, the TOP view of the inspected object is increased.

In addition, the sides of the object being inspected are observed at a wide viewing angle of 35°: this allows to clearly image the features of interest even when inspecting complex geometries.

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Catadioptriclens

CNI offers various ultraviolet lasers (diode lasers and diode-pumped solid-state lasers) with many wavelengths between 213 nm and 349 nm. The output power is up to 3 W, and the pulse energy is up to 10 mJ. The laser products include 5 series: high energy, high power, high stability, low noise and single longitudinal mode laser.

For the extreme ultraviolet region, there are sources based on high harmonic generation. Such sources can reach wavelengths down to a few nanometers while still having a table-top format. The average output powers, however, are fairly low.

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Catadioptriccamera

Applications are in chemical and biological detection, water purification, disinfection, skin treatment and fluorescence imaging.

The sides of the object are imaged through the catadioptric system, while the top surface is imaged directly onto the center of the sensor area, allowing for a complete and perfectly focused view of the inspected object.

Sacher Lasertechnik has developed a frequency-doubled laser system where a resonant cavity including a frequency doubler crystal is pumped via a tunable diode laser. Depending on the required SHG power, the tunable diode laser is either a high power external cavity laser, or a two stage Master Oscillator Power Amplifier System. The covered wavelength regime ranges from 365 nm up to 540 nm.

Product range expansion - discover PCCDL, our catadioptric lens now available for larger fields of view and with a more versatile design: one model for various sensor sizes!

The delivery of ultraviolet light in optical fibers is possible even at rather short wavelengths, but involves more serious limitations, comparing with sources for the visible or infrared spectral region. For example, silica fibers may exhibit substantial degradation (called solarization) when exposed to short-wavelength light, but that tendency depends strongly on the chemical composition of the fused silica. There are also attempts to use hollow-core fibers for UV transmission; the basic idea is to have most of the UV light in the air core, with only little overlap with the silica material which provides the guiding. That principle can be utilized even in wavelength regions where the absorption of fused silica is substantial.

PCCD series features catadioptric lenses exclusively developed and manufactured by Opto Engineering® to enable the 360° top and side view of objects with a single camera.

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Ultraviolet lasers need to be made with special ultraviolet optics, having a high optical quality and (particularly for pulsed lasers) a high resistance to UV light. In some cases, the lifetime of a UV laser is limited by the lifetime of the used optical elements such as laser mirrors.