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Narrow linewidth lasers with good beam quality attracted much attention in recent years due to their laser diverse applications in remote sensing, gravitational wave detection, nonlinear frequency conversion. Recently, reported a widely tunable in the middle infrared radiation (2.7 to 17 μm). Additionally, 1064 nm has especially application in sum frequency generation (SFG) with 1319 nm to produce 589 nm sodium laser guide star (LGS). Nowadays, there are several kinds of LGS format, such as continuous wave (CW), quasi-CW (QCW) microsecond (μs) pulse, and mode-locked short pulse.
Optromix Erbius-SF-1550-X series is a low-noise single frequency 1550 nm fiber laser based on a longitudinal single mode has a wide range thermal wavelength tuning and optional active wavelength control.
Optromix Company designed Erbius-SF-1550-X as a 19-inch benchtop module for an effortless industrial turn-key integration. Erbius-SF-1550-X comes with a piezoelectric tuning with internal and external wavelength modulation at kHz bandwidth for locking purposes. This is a perfect tool for research labs due to excellent performance, high reliability, and lower cost.
Single Frequency CW laser have unique key features, such as Ultra Narrow linewidth (<1 kHz). The typical linewidth is <1 nm for standard multiline models and is either in the kHz or MHz range for single-frequency options.
CW lasers in the ≤100 W power range are single-mode with theoretically limited beam quality, typical M2 ≤1.05. However, when the application requires it, multimode lasers are also offered.  Due to an absence of thermal lensing in the laser cavity, fiber lasers maintain beam mode quality and divergence over the full range of output power adjustment. This is not the case with DPSS bulk lasers which are typically optimized to run at the nominal power level.
The CW fiber lasers in the ≤100 W power range typically have fixed wavelength. Most models allow the user to select the wavelength over a certain range prior to the purchase of the laser. For Ytterbium lasers, the typical wavelength range is 1030-1090 nm (Yb CW fiber lasers in the range 978-1020 are also available); for Erbium lasers, the range is 1535-1565 nm; for Thulium lasers the range is 1.9-2.05 µm.
There is a great variety of Single frequency fiber laser applications, f.e. atomic trapping and cooling, optical tweezers, spectroscopy, efficient second-harmonic generation, LIDAR and optical sensing. If you would like to buy Optromix single frequency CW 1550 (1535 – 1580 nm) high power fiber laser Erbius-SF-1550-X series, please Contacts at:info@optromix.com or +1 617 558 98 58

Four types of lasers can be used for micro welding: pulsed neodymium-doped yttrium aluminum garnet (Nd: YAG), continuous wave fiber, quasi-continuous wave (QCW) fiber, and nanosecond fiber. Each type offers unique features that work best for specific applications. In some cases, several options may work: that’s when a cost of ownership and service -ability can tip the scales.
With the Nd: YAG laser, the active gain medium is neodymium, which is doped into a host crystal of yttrium aluminum garnet. This solid rod of material is typically 0.1 to 0.2 inch in diameter and about 45 in long. Micro welding Nd: YAG  lasers are optically pumped using flash lamps, they emit light which a wavelength of 1,064 nm, but can be frequency doubled (532 nm) to appear green. With the excellent pulse control, the Nd: YAG laser also offers high peak powers in small laser sizes, which enables welding with large optical spot size. The pulsed Nd: YAG laser is suitable for spot welding applications with less than 0.02-in. penetration and seam welding of heat sensitive packages.
A fiber laser is generated within a flexible doped glass fiber that typically is 10 to 30 feet long and 10 to 50 microns in diameter. Ytterbium is used as the doping element because it provides good conversion efficiency and a near 1-micron output wavelength, which matches well with existing laser delivery components.
The efficient lasing process allows the fiber laser to be small, air-cooled and offer high wall plug efficiencies. The fiber laser unique characteristics are its focusability and it’s beam qualities that can be fine-tuned for each welding application. The two ends of the beam quality spectrum are single mode and multimode. Single mode is defined by a beam quality of M2  less than 1,2, while multimode generally is above M2 of 2.
For high-speed seam welding applications, the fiber laser is operated in CW mode. In other words, the laser output remains on until it is turned off. For spot welding either a single weld or seam, the laser output can be pulsed or modulated, which means the laser is turned on and off rapidly. Cw fiber lasers are suitable for general seam welding up to 0.06 in. deep for a 500-W laser, high-speed seam welding of same and dissimilar materials, and producing spot welds less than 100 microns in diameters.
 
Quasi-continuous wave fiber lasers peak power and pulse width characteristics are similar to those of the Nd: YAG laser through the parameter range is not quite as broad. Similar to CW fiber lasers, the QCW lasers offer single mode to multimode options with spot sizes from 0.001 to 0.04 in. These lasers also shine in small spot size and small penetration applications, although they do offer fairly comprehensive coverage of many micro welding applications.
Nanosecond fiber laser typically used for laser marking applications can be repurposed for certain welding applications. It provides multi-kilowatt peak power, but with the pulse width of 60 to 250 nanoseconds that can be delivered between 20 and 500 kilohertz. This high peak power enables welding of almost any metal, including steel, copper, and aluminum. The very short pulse widths enable very fine control for welding small parts, as well as the ability to weld dissimilar materials.
 

Numerous photonics applications in research and industry require ultraviolet (UV) laser light. Only a few types of conventional laser systems provide UV light, and those emit at fixed wavelengths. Gas lasers, laser diodes, and solid-state lasers can be manufactured to emit ultraviolet light, and lasers are available which cover the entire UV range. The nitrogen gas laser uses electronic excitation of nitrogen molecules to emit a beam that is mostly UV. The strongest ultraviolet lines are at 337.1 nm and 357.6 nm,wavelength. Another type of high power gas laser is the excimer laser. They are widely used lasers emitting in ultraviolet and vacuum ultraviolet wavelength ranges.
Excimer lasers have been widely used for many photonics applications, such as polymer laser micromachining, ranging from microelectronics, medical, life sciences, automotive, printing, and other industrial applications. Excimer lasers produce high-energy UV radiation. They are suited for machining polymers, which exhibit good absorption at these wavelengths. These pulsed lasers produce high average UV power from a few to hundreds of watts at relatively low repetition rates, and from tens of pulses per second up to a few thousands of pulses per second. Each pulse duration can range from a few nanoseconds to hundreds of nanoseconds and their pulse energy range from a few millijoules to a few joules. The UV laser beams generated by these excimer lasers are generally incoherent, wide and multimode.
Excimer lasers are available at much higher average power levels than ultrafast lasers, and their initial cost is lower, especially if normalized to their power output. However, they require more maintenance and have typically higher operating cost. Excimer lasers can achieve much higher throughput for high volume manufacturing, especially for high-density patterns. For low-density patterns such as machining a few holes in each part, the choice is often more complex. High repetition rate, low power excimer lasers are now available with low operating costs and can be used economically for these applications.
Optromix Company offers compact and powerful excimer laser with the wavelength range of 193 nm to 308 nm. CL-5000 is equipped with high voltage switch – a high resource cold cathode thyratron. The laser has an average power stabilization system, which makes it easy and convenient to use. Moreover, CL-5000 provides a longer lasting time for gas mixture. The ultraviolet excimer laser is a perfect source for ophthalmic systems. It is also a great solution for various industrial purposes, namely manufacturing diffractive structures in optic fibers, micro marking, processing of certain materials and laser deposition.

There are many applications of lasers in which the beam profile technology is of critical importance. When the beam profile is important, it is usually necessary to measure it to ensure that the suitable profile exists. For some lasers and applications, this may be necessary only during the design and fabrication phase of the laser. In other cases, it is necessary to monitor the laser profile continuously during the laser operation. For example, scientific applications of lasers often push the laser to its operational limits and continuous or periodic measurement of the beam profile is necessary to ensure that the laser is still operating as expected. Some industrial laser applications require periodic beam profile monitoring to liquidate scrap produced when the laser degrades. In other applications, such as some medical uses of lasers, the practitioner has no capability to tune the laser, and the manufacturers measure the beam profile in the design phase to ensure that the laser provides reliable performance at all times.

The temporal nature of a laser beam enables it to vary from a continuous wave to an extremely short pulse providing very high power densities. The coherence of a laser enables it to travel in a narrow beam with a small and well-defined divergence or spread. This allows a user to define exactly the area illuminated by the laser beam technology. Because of coherence, a laser beam can also be focused to a very small and intense spot in a highly concentrated area. This concentration makes the laser beam useful for many applications in physics, chemistry, the medical industry, and industrial applications. Laser beams technology unique irradiance profile gives it very significant characteristics. The beam profile is the pattern of irradiance that is distributed across the beam or its cross-sectional irradiance profile.
Examples of two different types of ideal laser beams technology for different purposes are a Gaussian and a flat top beam. A Gaussian beam allows the highest concentration of focused light, whereas a flat top beam allows for very uniform distribution of the energy across a given area.
Optromix Company develops and manufactures a broad variety of Fiber lasers, СО 2 lasers, Ti: Sapphire lasers, Dye lasers, and Excimer Lasers. We offer simple Erbium laser and Ytterbium laser products, as well as sophisticated laser systems with unique characteristics, based on the client’s inquiry.

High power laser diodes have been developed for applications including solid-state laser pumping, fiber laser pumping, and material processing. The spectral bandwidth of high power diodes typically spread over the range of 3-5 nm. Narrow emission spectrum in the range of 0.1-0.5 nm and a smaller wavelength tolerance can be extremely beneficial for special applications such as the spin-exchange optical pumping (SEOP), which is of great importance in the field of nuclear physics , atomic physics , laser cooling and neutron scattering. A variety of external cavity techniques has been developed to narrow the spectral line width of high power diode lasers. Two types of gratings are used to form the external cavity. The diffraction grating external cavity provides a large tunable range of the center wavelength ~10 nm. Meanwhile, the volume holographic grating (VHG) external cavity has a smaller footprint with a limited tunable center wavelength range of <0.5 nm. The resonant wavelength of a VHG can be precisely tuned with temperature control. Using a thick VHG (14-18 mm) one can narrow the spectral line width down to a few GHz (7-10 GHz) with output power exceeding tens of watts.
Due to the low beam quality of high power broad-area laser diodes, it is difficult to effectively couple the laser power into a multi-mode fiber without special beam shaping treatment. High power, narrow spectral line width diode lasers are useful for optical pumping of alkali metal vapors. High power, spectral narrowed lasers with good stability are the key to the success of SEOP. However, such laser diode arrays are not the best choice for the high-efficiency optical pumping applications.
Achieving the narrow spectral linewidth that is required for a long coherence length makes for complicated and expensive lasers, although complexity and size can be somewhat reduced by going with a semiconductor laser design. Now, Optromix single frequency high power fiber Laser Irybus-SF-1030-X series offers a wide-range thermal wavelength tuning and optional active wavelength control. Irybus-SF-1030-X is a single frequency high power low noise 1030 nm – 1100 nm Yb-doped fiber laser. Its key advantage is an ultra narrow line width (<100 kHz) based on a longitudinal single mode. Irybus-SF-1030-X comes with a piezoelectric tuning, internal and external wavelength modulations at kHz bandwidth for locking purposes.

Femtosecond solid-state lasers, based on the Ti:sapphire gain medium, have revolutionized the field of ultrafast science in the past decade. Titanium-doped sapphire is a widely used transition-metal-doped gain medium for tunable lasers and femtosecond solid-state lasers. This type of fiber lasers have several advantages such as simplicity, excellent thermal conductivity, and stability. Nevertheless, researchers continue to investigate approaches to improving the performance of mode-locked solid-state lasers.
Titanium-doped sapphire (Ti:sapphire) is the most successful solid-state laser material in the near-infrared wavelength range due to its high saturation energy, large stimulated emission cross-section, and broad absorption gain bandwidths. It has been extensively developed for continuous-wave (CW) operation, ultra-short pulse generation, and high-power amplification. Moreover, Ti:sapphire technology has been successfully implemented in a different range of applications, f.e. high-intensity physics, frequency metrology, spectroscopy, as well as pumping of tunable optical parametric oscillators. Ti:sapphire has broad absorption bandwidth, due to the relatively weak absorption peak in the blue-green wavelength range. Its successful operation requires high-power blue-green pump sources. As such, Ti:sapphire lasers have been pumped with multi-watt argon-ion, copper-vapor, and most notably frequency-doubled all-solid-state green lasers, resulting in fairly bulky, complicated and expensive setups. For further advance in Ti:sapphire laser technology, it would be desirable to devise more simplified pump laser designs to reduce system complexity and cost, while maintaining or enhancing device performance with regard to all important operating parameters. СW Ti:sapphire laser pumped directly by a GaN diode laser in the blue was reported, but the limited pump powers available from diode lasers in good spatial beam quality restrict the effectiveness of this approach only to low-power CW operation. On the other hand, optically-pumped-semiconductor lasers in the green can in principle be used to pump CW Ti:sapphire laser, but limited progress has been achieved in this area so far, leaving open the need for the development of powerful alternative green sources with high spatial quality and in simple, practical all-solid-state design to pump high-power CW or mode-locked Ti:sapphire lasers. Optromix Company offers second-harmonic conversion in Ti:Sapphire laser system, TIS-SF is the most efficient for CW single-frequency emission, and its linewidth in the UV to the blue-green range is ultra narrow. TIS-SF tunable laser system is equipped with an exclusive Auto Relock function, electronic control system and resonant enhancement frequency doubler which allow it to operate steadily even under external perturbations.

Infrared is usually divided into 3 spectral regions: near, mid and far-infrared. The boundaries between the near, mid and far-infrared regions are not agreed upon and can vary. The main factor that determines which wavelengths are included in each of these three infrared regions is the type of detector technology used for gathering infrared light.
Near-infrared light is transmitted and focused to the sensitive retina in the same way as visible light, while not triggering the protective blink reflex.
The short-wavelength infrared is relatively eye-safe since such light is absorbed in the eye before it can reach the retina. Erbium-doped fiber amplifiers for optical fiber communications, for example, operate in that region.
The long-wavelength, infrared followed by the far infrared (FIR), which ranges to 1 mm and is sometimes understood to start at 8 μm already. This spectral region is used for thermal imaging.
The mid-infrared spectral range is understood to include wavelengths from 3 μm to 8 μm. There are many absorption lines e.g. of carbon dioxide (CO2) and water vapor (H2O). This spectral region is interesting for highly sensitive trace gas spectroscopy.
The mid-infrared lasers are of particular interest for in-situ and remote sensing of material composition as many chemical species have absorption features in this wavelength range that are associated with molecular rotational-vibrational transitions. These include molecules such as H2O, CO2, N2O, CH4, CO, NH3, NOx, HCl, and many other compounds. Currently, in the mid-IR range, CO2, and solid-state lasers dominate in materials processing and medical treatment applications.
Recent developments in quantum-cascade laser technology, resulting in room temperature, high power, and single-mode laser sources, allow access to much stronger absorption bands of CO and CO2 in the mid-infrared lasers.
Important CO2 laser characteristics are high unsaturated gain, high-power output, and good efficiency.
Optromix InfraLight-100/200/SP are a CO2 laser demonstrates outstanding results in processing different types of materials with varied thickness. Mid-infrared CO2 lasers operate in a quasi-sealed operation mode, a gas mixture ensures the extended lifetime of the laser. We offer the most effective CO2 lasers with minimum maintenance required, which can be used for a wide range of applications, including marking, engraving non-metallic surface, holding in circuit boards, surface cleaning, and laser for LIDAR. Moreover, it produces laser wavelength important for spectroscopy, specifically IR spectroscopy.
In Optromix, we aim to provide the best experience to our customers, and we will configure your laser system exactly according to your requirements.

In the past ten years, the generation of DUV radiation by solid-state lasers, including fiber lasers, has been extensively studied. Deep-UV light sources have a wide range of applications. Because shorter-wavelength light has higher photon energy, the photon energy of deep ultraviolet light sources is high enough to kill bacteria and viruses and decompose harmful stable substances, such as dioxin and polychlorinated biphenyls (PCBs), which have caused serious environmental problems all over the world. Therefore, deep-UV light sources are used in water purification, sterilization, and environmental protection equipment. In addition, since the focal point of light decreases with decreasing wavelength, deep ultraviolet light sources have potential for use in high-density optical data recording and nanofabrication technology. Furthermore, they are also expected to be used in medical procedures and analytical instruments.
Most DUV fiber lasers used are gas light sources, such as mercury lamps or excimer lasers. They contain toxic substances, which cause serious environmental problems, and are large in size and low in efficiency and reliability. Moreover, the emission wavelengths are fixed at 254 nm for mercury lamps and 193 nm for ArF excimer lasers.
New laser sources operating in the deep-ultraviolet (DUV) range (the wavelength region below 300 nm) can help to streamline industrial and scientific applications. For example, state-of-the-art semiconductor lithography and inspection are currently performed using somewhat-expensive pulsed excimer lasers at 193 nm. Actinic inspection of exposed wafers—that is, inspection at the exposure wavelength  can benefit from continuous-wave light sources.On the scientific side, applications include angle-resolved photoemission spectroscopy (ARPES), where researchers need high photon energies for the measurement of large portions of the Brillouin zone of new materials. In addition, new applications are emerging in the field of Raman spectroscopy, such as protein structural analysis and Raman spectroscopy beyond the solar background.
In quantum technology, tunable DUV lasers are used for high-resolution spectroscopy and laser cooling. For instance, atomic clocks can be improved considerably with direct access to optical transitions in aluminum or mercury ions, and one can possibly realize nuclear optical clocks with thorium in the near future
Optromix Company has the unique development DUV Magius fiber laser with central wavelength 257.5 nm. UV CW 257.5 nm single-frequency Magius fiber laser is developed specifically for fiber Bragg gratings (FBG) writing. Optromix fiber Bragg gratings (FBG) writing workstation is based on the fourth Ytterbium laser harmonic. If you would like to buy UV CW 257.5 nm single-frequency Magius fiber laser or fiber Bragg gratings (FBG) writing workstation, please Contacts at: info@optromix.com or +1 617 558 98 58
 

There are literally more than 10,000 types of lasers developed by today. Most of them are developed only in a laboratory, but some found very broad applications.
Fiber lasers are an interesting class of solid state lasers. Active media are the core of rare-earth (Er, Yb etc.) doped fiber. Pump light can be in the core or the cladding. Fiber lasers can be very compact and rugged. They are becoming very popular with the advent of suitable diode pumps. Since the fiber core is very small, threshold pump power is a few orders of magnitude less as compared to the bulk case. Since core-pumping requires high spatial quality lasers, diode bars and arrays cannot be used. This limits the pump power. To resolve this problem, high power fiber lasers use pumping from the cladding of the fiber. Cladding pumped Nd and Yb doped fiber can yield ~10 W output power.
Single-frequency sources are also attractive because they can be used for driving resonant enhancement cavities, e.g. for nonlinear frequency conversion, and for coherent beam combining. Typical applications of single-frequency lasers occur in the areas of optical metrology and interferometry, optical data storage, high-resolution spectroscopy (e.g. LIDAR), and optical fiber communications. In some cases such as spectroscopy, the narrow spectral width of the output is directly important. In other cases, such as optical data storage, a low-intensity noise is required, thus the absence of any mode beating noise.
The unique characteristics of ultrafast lasers, such as picosecond and femtosecond lasers, have opened up new avenues in materials processing that employ ultrashort pulse widths and extremely high peak intensities. Thus, ultrafast lasers are currently used widely for both fundamental research and practical applications. Surface processing includes micromachining, micro- and nanostructuring, and nano-ablation, while volume processing includes two-photon polymerization and three-dimensional (3D) processing within transparent materials.
Tunable wavelength laser arrays find wide applications in fiber-optic networks, broadband sensors, biotechnology and medicine diagnostics due to their wide tuning range and stable lasing operation.
 
CO2 laser is one of the most powerful. It is used very commonly for «hardcore» materials processing like cutting and welding. Lasing action results from transitions between vibrational levels of CO2 .CO2 lasers are typically RF discharge pumped. They can operate pulsed or CW. They are mostly used in industry and medicine, where high powers are needed.
Gas lasers, laser diodes, and solid-state lasers can be manufactured to emit ultraviolet rays, and lasers are available which cover the entire UV range. The strongest ultraviolet lines are at 337.1 nm and 357.6 nm,wavelength. Ultraviolet lasers have applications in industry (laser engraving), medicine (dermatology, and keratectomy), chemistry (MALDI), free air secure communications, computing (optical storage) and manufacture of integrated circuits.
Ti:Sapphire is the most widely used tunable and mode-locked solid-state laser. It has a bandwidth of about 400 nm, centered at 800 nm. Emissions result from 3d transitions. No diodes are available at this wavelength. This is the main drawback of Ti:Sapphire. Dye lasers use solutions of organic dyes as active media. Solvents can be alcohol, glycerol or water. Due to the large wavelength range, dye lasers are used in many scientific spectroscopic applications. They are also used in medicine for retinopathy and curing dermatological diseases.
Optromix Company provides all types of mentioned lasers and can produce lasers to an individual order for each customer.
 

Quasi-continuous-wave (quasi-CW) operation of a laser means that its pump source is switched on only for certain time intervals, which are short enough to reduce thermal effects significantly, but still long enough that the laser process is close to its steady state, i.e. the laser is optically in the state of continuous-wave operation. The duty cycle may be, e.g., a few percent, thus strongly reducing the heating and all the related thermal effects, such as thermal lensing and damage through overheating. Therefore, quasi-CW operation allows the operation with higher output peak powers at the expense of a lower average power.
A quasi-continuous-wave operation is most often used with diode bars and diode stacks. Such devices are sometimes even designed specifically for quasi-CW operation: their cooling arrangement is designed for a smaller heat load, and the emitters can be more closely packed in order to obtain a higher brightness and beam quality. Compared with an ordinary continuous-wave operation, additional lifetime issues can result from the quasi-CW operation, related e.g. to higher optical peak intensities or to frequent temperature changes. Some doped-insulator solid-state lasers are also operated in quasi-cow operation. Such lasers are sometimes called heat capacity lasers.
Vacuum-ultraviolet (VUV) coherent light has been proposed for different applications, as optical data storage, metrology, biomedical application, fundamental spectroscopic research, and laser lithography. Conventional coherent VUV laser sources at this wavelength are excimer lasers. These lasers generate a high output power of more than 100 W, however, their structures are huge and complex. Moreover, high manufacturing and maintenance costs are required. The low repetition rate (usually several kHz) of such excimer laser systems also restricts the applicability of many shot statistics during data acquisition in spectroscopic measurements. The development of coherent radiation with high-repetition-rate (quasi-continuous wave) or continuous wave (CW) in VUV has to be based on the frequency conversion or exploitation of new laser materials. At present, the later is a more challenging topic and the former is the unique way to generate VUV laser light with the high-repetition-rate or continuous wave. Generally, techniques for optical frequency conversion for generating short wavelength light are the second harmonic generation (SHG) and sum frequency generation (SFG) process.