Lasers for Interferometry

Interferometry Interferometry refers to a wide range of techniques that rely on the superimposition of two coherent light paths, most often split from a single source, to form an interference pattern. Lasers for Interferometry This interference arises

Lasers for Flow Cytometry

Flow Cytometry Flow cytometry is a method for the quantitative determination of cellular properties, analysing light incident on a focussed stream of fluid containing a heterogenous population of biological samples. Lasers for Flow Cytometry Cells, or other particles, are individually passed through a light path at high speed while suspended in a tightly focussed stream of fluid, causing an energy

Two-photon Quantum Interference and Entanglement at 2.1 μm

Shashi Prabhakar, Taylor Shields, Adetunmise C. Dada, Mehdi Ebrahim1, Gregor G. Taylor, Dmitry Morozov1, Kleanthis Erotokritou, Shigehito Miki2, Masahiro Yabuno, Hirotaka Terai, Corin Gawith, Michael Kues, Lucia Caspani, Robert H. Hadfield and Matteo

The Future of Energy

ITER, the International Thermonuclear Experimental Reactor, is a collaborativeglobal engineering megaproject focused on fusion research and the development of the worlds largest experimental tokamak by 2025. A tokamak reactorconfines and controls the

Lasers for Quantum Technology

Already many organisations rely on atomic clocks for their most accurate measurements of time and there is a large scale movement to take quantum gravimeters out of the lab and into the field in order to monitor ice sheets and magma flow in volcanoes. The possible applications are widespread. The industrial cost for oil exploration companies to find one leak within thousands of miles of pipe runni

Lasers for Semiconductor Inspection, Metrology, Optical Manipulation

1. Lasers for Semiconductor Inspectionand Metrology As the complexity on the wafer surfaces grows, it is essential that these fabricated devices are monitored for optimisation and quality control, both during and after processing. Critical parameters

Lasers for Holography and Imaging

Rather than an image as recorded by standard photography, a holographic image is a record of the difference in phase and amplitude intensities of the two light paths as they arrive at the recording media. The resulting interference image is meaningles

Lasers for Raman Spectroscopy and Microscopy

When a laser is incident on a sample, most of the photons will be scattered elastically and will not be subject to any energy change, known as Rayleigh Scattering. Raman scattering events are significantly more infrequent, only around 1 in a million

Optical Isolator

An optical isolator, or optical diode, is an optical component which allows the transmission of light in only one direction. It is typically used to prevent unwanted feedback into an optical oscillator, such as a laser cavity. The operation of the dev

Fiber Laser Basics

A fiber laser (or fibre lase) is a laser in which the active gain medium is an optical fiber doped with rare-earth elements such as erbium, ytterbium, neodymium, dysprosium, praseodymium, thulium and holmium. They are related to doped fiber amplifiers, which provide light amplification without lasing. A fiber laser with MOPA configuration is shown as follows: Pump laser diode: Fiber-coupled diodes

Choosing the Right Galvanometer and Servo for the Job

Galvanometer-based optical scanners are the preferred positioning solution for an increasingly broad range of industrial, scientific, imaging, and medical laser applications. While a number of scanning approaches are available, galvanometer-based scanners commonly called galvos offer flexibility, speed and accuracy at an attractive cost. While many imaging applications take advantage of the galvos

Optimizing Laser Glass Cutting with Diffractive Beam Shaping

Laser glass cutting with ultra-short IR pulses is lately growing to become a key technique for the high throughput glass processing. Cutting thick glasses (500um) using this technique possess unique challenges, as the laser energy needs to be both foc

Spectral Fiber Sensors for Cancer Diagnostics

Cancer is one of the main causes of morbidity and mortality across the globe. Hence, attempts are focused on the early-stage detection of cancer, and optical spectroscopy has been largely used for early diagnosis of cancer. Fluorescence or molecular

Applications of Ultrafast Lasers & OPOs

Applications: Lasers for life sciences There is a need to conduct advanced laser imaging as part of the private and publically funded research into diseases such as cancer, Alzheimers and Parkinsons which are prevalent due to the aging population

Electro-optic Effect

An electro-optic effect is a change in the optical properties of a material in response to an electric field that varies slowly compared with the frequency of light. The term encompasses a number of distinct phenomena

Laser Engraving

Laser engraving, which is a subset of laser marking is the practice of using lasers to engrave an object. Laser marking, on the other hand, is a broader category of methods to leave marks on an object, which also includes color change due to chemical/

How to Select An Electro-optic Q-switch (Pockels Cell)

1. How to Select an EO Q-switch to Meet Your Switching Frequency Requirement The simple answer is that the IMPACT Pockels cells are recommended for operation at a maximum of 1-2kHz. This is not to say they will completely fail to operate at 5kHz. The

Laser-induced Damage in Fibers

Micropositioning, of the input beam must be started from low level of laser beam energy and be carried out very carefully. Sometimes the damage occurs in the place of a hidden defect (alien particle, excessive bending, or some other defect of structur

Basics of Beam Expander

The laser beam enter a beam expander after the laser beam is generated in the laser resonator. The most common type of beam expander is derived from the Galilean telescope which usually has one negative input lens and one positive output lens. The inp

First Pulsing Control of AO Q-switch Drivers

When Q-Switching lasers at high repetition rates, it is normal to observe a giant first pulse after a pause in operation. For many applications this excess energy must be dissipated before or during the next modulation cycle. For example, in lasermarkers, when the time taken for the scan

Basics of F-theta Lenses

General information Lenses used in combination with XY galvanometer scanners are called -theta lenses, plane field objectives or simply scan lenses. -theta lenses are used in various applications from industrial material processing, drilling, welding

Principle of Acousto-Optical Q-switch

The acousto-optical Q-switch often used in the laser marking makes use of mutual interaction between an ultrasonic wave and a light beam in a scattering medium. The light beam that enters in a direction forming a Bragg angle to the wave surface of the

[Application] High Power 780nm for laser cooling and manipulation of Rb atoms

The manipulation of Rb atoms is commonly performed using diode-based laser systems typically producing several hundred mW of usable 780nm power. Many atom optics applications however favour higher laser power whilst maintaining a narrow linewidth and

[Application] Medical Device Manufacturing with FCPA

Lasers are often integral to the production of components for a range of application areas, including medical device manufacturing. These parts are then integrated in numerous products that vary from complex surgical instrumentation to simple single-use products that are used at the time of need by caregivers in hospital settings or out in communities. Designers and manufacturers of medical device

[Application] DOEs for Beam Shaping

A diffractive optical element (DOE) uses thin micro-structure patterns to alter the phase of the light that is propagated through it. Those micro-structures, once properly designed, can manipulate the light to almost any desired intensity profile or s

[Application] Ultrafast Laser on Metal and Glass Welding

Breakthrough process welds metal and glass together using ultrafast lasers Traditionally, welding has been limited to materials that share similar properties, so its tough to make even aluminum and steel join forces. But now, scientists from Heriot-Wa

Laser Mold Cleaning

The new Vulcan laser cleaning systems delivers up to 5x the processing speed of conventional tire mold cleaning systems with an unprecedented 500 – 1600 Watts of cleaning power, with its industry leading laser pulse energy, the Vulcan is the new definition of portability and convenience for tire mold cleaning and preparation.

Ultrafast Laser in Life Science

Empowering biological scientists to see deeper and at higher resolution and frame rates. Biologists, neurobiologists and physicists are using bioimaging techniques to better understand the biological structures and processes of the brain. Over the pas

Optical Measurement of Narrow Holes

By: Roei Yiftah, Moshe Danziger and Shmulik Barzilay General Measuring deep and narrow holes with an aspect ratio of 1:5 (Diameter : Height) has always been a difficult and largely an unsolved problem. This is even more problematic if not only the bot

Scanning Probe Microscope for nanotechnologies

Hollow-core Crystal Fiber in Medical and Research section

Through its unique solutions for laser beam delivery and laser frequency conversion, our technology can address most of the bio-photonic applications such as cytometry, imaging, DNA sequencing or forensics.

Laser De-Painting

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Autofocus for Laser Marking, Welding, Drilling and Cutting Systems Using Non-Contact Distance Sensor

Conventional laser marking, welding, drilling and cuttingsystems often struggle with focusing the laser precisely onthe objects surface. Optimet sensors offer a unique solutionfor autofocusing laser systems. Integrating Optimets noncontactdistance mea

Laser Clean

New Green Cleaning Technology Laser Cleaning Laser cleaning is basically blast off the contaminants or impurities on the surface of the target by applying laser pulse directly to them. The great control over power and pulse parameters offer by laser a

Ultrafast Laser 3D Manufacturing System

Our proprietary technology on advanced ultrafast lasers based 3D manufacturing (Additive Manufacturing and Subtractive Manufacturing) opens a variety of opportunities in many fast-growing industries like aerospace, defense, bio-medicals, sensors, and

Diffractive Optical Elements (DOE) for Laser Perforation

A perforation is a small hole in a thin material or web. Laser perforation is typically used for sheet materials such as cigarette-tip paper or packaging foil for the food industry (prolongs the freshness and quality of perishable goods). Such applica

Diffractive Optical Elements (DOE) for Laser Brazing

In laser brazing applications, two metal sheets are joined by a laser melted solder wire. The join quality has been proven to improve when the metal surfaces are cleaned and pre-heated before the brazing wire is melted. Typical applications are found

Air-cooled Laser VS Water-cooled Laser

Air-cooled laser/ laser machine: laser is cooled by the environment air (fan, fin, TEC etc.) Water-cooled laser/ laser machine: laser is cooled by chiller, two tubes connect laser and chiller (there are two types of chiller: air-cooled chiller and wat

Air-cooled Chiller VS Water-cooled Chiller

Difference: Air-cooled chiller: condenser is cooled by the environment air (fan, fin, TEC etc.) Water-cooled chiller: c ondenser is cooled by water (connected to cooling tower). Application: Air-cooled chillers: Small or medium installations. Frequent

How to Calculate Magnification of Cutting Head?

The laser cutting head magnification M can be calculated from: M = f(focal unit) / f(collimaton unit) = d(focal diameter) / d(core diameter of fiber) Focal diameter can be estimated based on above formula: d(focal diameter) = M * d(core diameter of fi

Laser Projection

Electroactive polymers (so-called artificial muscles) are used to oscillate a diffuser at a high frequency to average out the speckle patterns. This principle is extremely compact, completely free of mechanics and low in power consumption.

CO2 vs Ceramic Lasers

There are several types of materials used to construct laser sources. The main body of a laser, containingthe critical laser gas mixture, is referred to as a core. They can be made of metal, ceramic or glass. History of Laser Development Ceramic core lasers were developed in the 1970s for commercial applications as water-cooled, ion gaslasers. All metal laser technology has its genesis in military

Optics in CO2 Lasers

Reflective Optics Reflective optics are designed to reflect the laser beam, usually for beam positioning purposes. At the wavelengths produced by CO2 lasers, common substrate materials include silicon (Si), copper (Cu), aluminum (Al) and molybdenum (M

Material Applications of CO2 Lasers

Metal vs. Organic CO2 lasers with power levels below 500 W produce energy that is easily absorbed by most organic materials, but is mostly reflected by metals at room temperature. While CO2 lasers can mark, cut and engrave organic materials,

CO2 Laser Material Processing

CO2 lasers provide an efficient non-contact method for cutting and marking a wide variety of materials including plastics, fabrics, leather, wood and laminates. The wavelength of the energy emitted from the CO2 laser is absorbed very efficiently by

CO2 Laser Material Processing

CO2 lasers provide an efficient non-contact method for cutting and marking a wide variety of materials including plastics, fabrics, leather, wood and laminates. The wavelength of the energy emitted from the CO2 laser is absorbed very efficiently by these materials.

Lamp Lifetime

Lamp lifetime, also known as ageing, is a complex subject. It is closely related both to the lamp’s application and the environment in which it is used.

Basics of 2-axis Laser Scanners

A laser beam is reflected from two scan mirrors in turn, and directed through a focusing lens. The mirrors are capable of high speed deflection about a rotation axis, being driven by a galvo-scanner motor. In most cases the maximum deflection angle of