Horizontal Stacked Laser Diode
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Founded in 2011, Professional Laser diode supplier, manufactures high-power diode lasers and systems in a wide range of output powers and wavelengths including laser chip, fiber coupled laser diode, single bar and high power diode laser array.
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What is Horizontal Stacked Laser Diode?
Horizontal stacked laser diodes consist of numerous diode laser bars arranged side-by-side. This arrangement allows for higher output power and greater beam uniformity, as the individual diodes can be individually controlled and adjusted. For certain applications.
To achieve the highest beam quality, the diode bars should be as close to each other as possible. On the other hand, effective cooling requires a certain minimum thickness of the heat sink mounted between the bars, and the beam quality (and subsequent brightness) of the combined output of the diode stack in the vertical direction is much lower than that of a single diode bar. However, there are several techniques that can significantly alleviate this problem, such as by spatially interleaving the outputs of different diode stacks, polarization coupling or wavelength multiplexing. BrandNew can all be achieved by customization.
Water Cooled
Conduction Cooled
FAC Available
The Feature Of Horizontal Stacked Laser Diode
Ease of Integration
Horizontal stacked laser diodes may be easier to integrate into certain systems or devices, depending on the orientation requirements. The horizontal layout can be more compatible with the design of specific equipment.
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Enhanced Beam Combining
Horizontal stacked laser diodes can facilitate certain beam combining techniques more effectively than vertical arrays. This is particularly relevant in applications where multiple laser beams need to be combined into a single, more powerful beam.
02
Optical Design Flexibility
The horizontal arrangement provides greater flexibility in optical design, allowing for adjustments to optimize performance, such as controlling beam divergence or shaping the beam profile.
03
Application-Specific Optimization
BrandNew can optimize Horizontal stacked laser diodes for specific applications, tailoring the design to meet the requirements of industries such as medical devices, industrial processing, laser displays, and scientific research.
04
What's Horizontal Stacked Laser Diode function?
If Horizontal Stacked Laser radiation with much higher brightness is required, the laser radiation may be used for pumping a high-power fiber laser based on a double-clad fiber. Such a device can serve as a brightness converter, delivering a somewhat reduced output power but with much higher beam quality. In horizontal stacking, the diode bars are arranged side by side to form a long linear array of emitters. This Horizontal Stacked Laser arrangement is easier to cool, so the output power per emitter is higher. The horizontal stacking emission mode is suitable for pumping rod lasers, for example, but may not be convenient if a nearly circular output beam is required. The number of diode bars (and thus the total output power) of horizontally stacked lasers is more limited than that of vertically stacked lasers.
The price of horizontal stacked laser diode stacks has not changed significantly over the years, while the output power has increased significantly with technological advances. As a result, the price per watt of output power has dropped significantly. At the same time, the lifetime of the horizontal stacked devices has generally increased, so the cost per watt-hour has dropped even more. This also depends on various factors, such as the emission wavelength, the cooling method, etc.
What is the main difference between Horizontal Stacked Laser Diode and Vertical Stacked Laser Diode
A laser diode stack, also called laser diode array, comprises a number of laser diode bars, wherein each laser bar has a number of emitters generating laser beams. Laser diode stacks can produce higher output power than single diode bars. Furthermore, stacking multiple bars allows for a highly modular approach for power scaling well into the multi-kW range. This modularity gives flexibility to scale-up a laser stack to the requested power level at a given center wavelength, offering significant advantages and flexibility over conventional solid state lasers.
Laser diode stacks have a greatly improved size, weight and power efficiency ratio, enabling significantly higher peak power and brightness compared to traditional fiber and solid state laser systems. This makes them suitable for portable and high power applications. Furthermore, beam shaping optics can be attached to the diode stack for beam shaping and collimation lenses to focus the individual output beams into a single high power output beam (as in direct diode lasers). Optics can be selected to collimate the output in both fast and slow axes, shape the light beam into areas, lines or spots, depending on the application needs. One drawback is that stacks with arrays of individual emitters usually require many micro lenses to combine the outputs into a single beam. This can add to the complexity of the system, reducing the portability and robustness of the system. The laser light emitted from diode bars can also be called into optical fibers to deliver the output power into single- or multimode optical fibers. The main advantage is that, apart from competing with solid state lasers, stacked laser diodes offer an easy, compact way to scale-up the power. Thus diode stacks are useful for optical pumping of solid state lasers, highly directed energy, medical applications, and materials processing. The high peak power of diode stacks is also useful for long range illuminators which can require propagation distances in the order of kilometers. In order to achieve sufficient target irradiance, multiple laser diode bars can be stacked with hundreds, even thousands, of individual emitters.
Laser diode stacks are available in vertical or horizontal configuration and operate in CW and pulsed mode. Horizontal diode stacks consist of numerous diode laser bars arranged side-by-side. This arrangement allows for higher output power and greater beam uniformity, as the individual diodes can be individually controlled and adjusted. For certain applications, such as side pumping of a solid state laser, when higher optical power is required, an array of laser bars are packaged horizontally.
Vertical diode stacks consist of numerous diode laser bars arranged vertically, each operating in series. This arrangement allows for a smaller footprint and a more compact design, but it also limits the maximum output power and can result in less beam uniformity.
The different between water cooled and conduction cooled Horizontal Stacked Laser Diode
About Water cooled Horizontal Stacked Laser Diode:
The Water Blocks are an effective solution for cooling laser diodes, laboratory instruments, medical products, and recirculating chillers. By providing a source of cooling liquid such as tap water, the liquid circulates within the cavity of the water block, effectively absorbing heat from the TEC or electronic components. The water inlet and outlet of the block are conveniently located on the same side and are equipped with two brass hose barb fittings.
These water cooled horizontal stacked laser diode are compact and Flexible combination and high reliability. Single peak power is available in 100W, 200W, 300W, and 500W. The water cooled horizontal stacked laser diode peak power of a single laser can reach 30000W, single wavelength and multi-wavelength combinations are optional.
About conduction cooled Horizontal Stacked Laser Diode:
Conduction-cooled diode lasers are widely used in solid-state pump lasers. In response to the trend of lightweight and miniaturized conduction-cooled modules, we at BrandNewTech have designed structures such as arc laser arrays, area laser arrays, and ring laser arrays to meet customer needs. These conductions cooled horizontal stacked laser diode have the characteristics of compact structure, flexible configuration, and high reliability. The conduction cooled horizontal laser peak power of a single bar is 100W, 200W, 300W, and 500W. The conduction cooled horizontal stacked laser diode peak power of a single laser can reach 30,000W, and single-wavelength and multi-wavelength combinations are available. Our laser bars are packaged in gold-tin for high reliability.
What does adding the FAC do for Horizontal stacks?
Fast Axis Collimators (FAC) are compact, high-performance aspheric cylindrical lenses designed for beam shaping or laser diode collimation applications. The Fast Axis Collimators (FAC)aspheric cylindrical design and high numerical aperture allow uniform collimation of the entire output of the laser diode while maintaining high beam quality. Fast Axis Collimators have a transmission greater than 99% over the specified spectral range and are available in a variety of focal lengths. Fast Axis Collimators (FAC) Compared to conventional lasers, light guidance performance is improved by 25% and light uniformity is improved by 20%.
Our new diode laser hair removal machine uses state-of-the-art Fast Axis Compression (FAC) technology. This ensures that the machine's energy output is greater than conventional lasers.
So-called fast axis collimation (FAC) lenses compensate for the astigmatism produced by edge-emitting PLDs, thus ensuring that as many photons as possible reach the target. Optics and laser diodes are precisely mounted in the package
Products with integrated FAC lenses are mainly used in laser range finders (LRFs). The accuracy of these systems depends on as many photons as possible reaching the target and reflecting back to the detector – the avalanche photodiode (APD). To achieve this, the beam focused by the FAC lens requires a lower output power. This makes it possible to develop smaller and more energy-efficient LRFs without compromising the reliability of the measurement.
What is the proper way to use a horizontally stacked laser array?
The present invention relates to horizontally stacked laser array assemblies for combining laser beams; in particular, horizontally stacked laser array assemblies that provide high brightness laser beams for use in systems and applications in the fields of production, manufacturing, entertainment, graphics, imaging, analyzing, monitoring, assembly, dentistry and medicine.
Many horizontally stacked laser array, particularly semiconductor lasers, such as laser diodes, provide laser beams with highly desired wavelengths and beam qualities, including brightness. These horizontally stacked laser array can have wavelengths in the visible range, the UV range, the IR range, and combinations thereof, as well as higher and lower wavelengths. The technology of semiconductor lasers, as well as other laser sources (e.g., fiber lasers), is rapidly evolving, and new laser sources continue to be developed and offered at existing and new laser wavelengths. Despite having desirable beam quality, many of these horizontally stacked laser array have lower laser power than desired or required for a particular application. As a result, these lower powers have prevented greater utility and commercial application of these laser sources.
In addition, prior efforts to combine these types of horizontally stacked laser array have often been inappropriate, some of the reasons for this being difficulties with beam alignment, difficulties in maintaining beam alignment during application, loss of beam quality, difficulties with special placement of the laser source, size considerations, and power management, to name a few. The horizontally stacked laser array can be extended along the horizontal direction and is a linear array, which mainly serves to pump a solid laser medium with high absorption in the form of a long bar, so it does not produce high power and high power density.
In the horizontal isometric steering arrangement the stack extends along the horizontal direction, and each laser bar deflects the beam through the corresponding steering mirrors to realize the iteration of the beam along the direction of the fast axis. The semiconductor laser array device using the horizontal contour steering arrangement contains at least 2 semiconductor laser strips, and an optical system for laser steering corresponding to each semiconductor laser strip. In this technical solution, the vertical distance between the final light output surface and each laser bar is different, and due to structural limitations, in order to obtain a uniformly output laser beam, the optical range difference between the horizontally stacked laser bars is made to realize self-compensation, so that each horizontally stacked laser bar must be staggered with a large pitch, and the overall structure is bulky.
In the horizontal step steering arrangement, each laser bar realizes beam deflection through the corresponding steering mirrors to realize beam iteration along the fast axis direction. However, in this technical solution, the optical range of each laser bar is unequal, and through the reflection of the optical system, the light-emitting beam of each laser bar is finally output perpendicular to the original light-emitting direction of the semiconductor laser bar after different optical ranges. Since the length of the horizontally laser bar is at least 10 mm, to ensure that the laser bars do not interfere with each other, the optical range difference between neighboring laser bars is at least 10 mm, and the laser bars all have a certain fast-axis divergence angle and a slow-axis divergence angle, so after a longer optical range, the final spot size will be very large, and the beam power density is small. In order to obtain a better combination of beams, it is necessary to add additional optical range compensation optics.
What are the application areas for horizontal stackes?
The horizontal laser beam from the LD stacking module is focused into spots, rectangles, or lines through prisms and lenses, resulting in high energy density that can be optimized for applications in dermatology/aesthetics, sensing, defense, and material processing, such as metalworking, welding, heat treatment, and marking.
Medical and Aesthetic Applications: horizontal stack Laser diode arrays are key components used in laser hair removal, laser skin resurfacing, wrinkle reduction, ophthalmology, and photodynamic therapy.
Lighting: horizontal stack Laser diode arrays can produce high-intensity, directional light with low divergence over long distances. This makes them ideal for long-range imaging applications, such as imaging, machine vision, and lidar applications.
Material Processing: Applications include marking, engraving, plastic welding, and ablation.
Optical Pumping: horizontal stack Laser diode stacks can be used as pump sources to provide energy to gain media for amplification in solid-state laser (DPSSL), hybrid laser, or fiber laser systems. The advantages of laser diodes include the ability to operate at higher repetition rates, higher efficiency (>60%), and a significantly smaller size and weight compared to other pumping solutions like flashlamps. We offer a wide range of horizontal diode laser modules with from 2 to 13 wavelengths in horizontal lines, with CW or QCW operation.
We offer a wide range of horizontal diode laser modules with from 2 to 13 horizontal lines, with CW or QCW wavelengths. These extremely powerful arrays can be arranged side by side or in any other custom pattern to provide the maximum power density required for side pumping of solid-state laser applications.
In addition, these modules are water-cooled and can be used in star-folded side-pumped diode solid-state laser configurations. Ability to build horizontal stacks in the wavelength range from 630nm to 2200nm. For wide temperature applications. It is characterized by high peak power and a wide application temperature range.
How to maintain horizontal stack laser a long life?
It is no surprise that horizontal laser diodes are becoming more powerful every year. While this increase in power has brought new applications and new markets, it has also created a big problem - waste heat.
Today, the main challenge facing horizontal laser diode manufacturers is not how to make more powerful lasers, but how to cool the lasers so that they can be used for a long time.
Today, in many horizontal laser diode applications, the packaging life of the horizontal laser diode bars and the cooling device is the limiting factor. The most common way to remove the large amounts of waste heat from laser diode arrays is to use copper-based microchannel coolers. This requires pumping a coolant through microchannels to carry away the heat. In most commercially available coolers, the coolant is in electrical contact with the diode bars. This requires the use of deionized water, which not only increases the requirements on the cooling system, but also causes erosion and corrosion, which can eventually lead to failure of the microchannel cooler.
In practice, this is surprisingly difficult - cooling both sides of a horizontal laser diode bar. Most horizontal laser diode cooling technologies only allow cooling from one side of the laser chip, the p-side, which is directly above the microchannel. The n-side is usually not cooled, using wire bonds or thin copper sheets as n-contacts. It is possible to passively cool the laser from both sides without using microchannels and their associated problems. The idea seems simple, but the mechanical stresses on both sides of the horizontal laser are not the same. We have to find the right solder, the right pressure, adjust the geometry of the structure and change the surface quality of the heat sink.
What is Micro channel horizontal stack array principle？
Micro channel horizontal stack array lasers feature closely spaced laser emitters, allowing for precise targeting of hair follicles with minimal impact on surrounding skin tissue. Benefits: Precision: Ideal for small treatment areas. Cooling Efficiency: Advanced systems reduce skin burns and discomfort.
1. According to customer needs, indium soldering or gold soldering packaging technology can be used. The micro channel horizontal stack array has the advantages of high reliability, long life, high photoelectric conversion efficiency, high stability, high beam quality, less smile, narrow line width, etc.
2. The micro channel horizontal stack array has the characteristics of wide wavelength and power coverage, with wavelengths from 630nm to 1940nm, and power coverage from watt level to continuous 250W, quasi-continuous 500W.
3. A variety of product packaging forms can meet the needs of different customers, such as single strip, vertical stacking array, horizontal stacking array, two-dimensional area array and strip fiber coupling products.
4. Customers can choose fast and slow axis collimation, VBG locked wavelength, BTS beam conversion, beam combination, spot homogenization, laser head overall design, etc. The micro channel horizontal stack array has the advantages of low divergence angle and high directivity. Microchannel horizontal stack array is a heat dissipation method for diode laser bars. Microchannel horizontal stack array has a very good heat dissipation effect without any burning problem. We usually import this heat sink from Germany with very good quality.
The different between QCW and CW horizontal stack laser
1: The QCW horizontal bar laser series features high power semiconductor lasers in a compact form factor and in a variety of array configurations. The QCW horizontal stack array lasers use gold-tin brazing technology for reliable and long-lasting performance. They feature controllable spectral width, high power density, high peak power, and high electro-optical conversion efficiency. The QCW laser wide operating temperature range makes them suitable for applications such as lighting, research, testing, and pump sources. The series includes horizontal, vertical, polygonal, annular, and micro-stacked arrays. Horizontal stack laser is a quasi-continuous wave (QCW) laser diode G stack, which is an array packaging form involving multiple stack arrays. It is used as a pump source and has the advantages of compact structure, small size, light weight, high power density, high electro-optical efficiency, stable performance and long service life.
2: Horizontal stacking to increase the output power in CW mode, Our horizontal stacks form actively cooled stacks for CW mode. Horizontal stacks can be used to increase the optical output power of diode lasers. For this purpose, up to 12 mounted laser bars can be stacked to form a diode laser stack or assembly. Each laser bar can individually deliver up to 120 W in CW mode. Due to the small gaps between the laser bars, maximum brightness can be obtained from the laser stack, enabling efficient operation. You can choose between horizontal stack array laser diode stacks with fast axis (FA) or combined fast/slow axis (SA) collimation.
Quasi-CW lasers (QCW) can operate in either continuous wave mode or high peak power pulse mode. Unlike conventional continuous wave lasers, whose peak and average powers are always the same in continuous wave and continuous wave/modulation modes, the peak power of QCW horizontal stack array in pulse mode is several or even dozens of times the average power. QCW horizontal stack array can generate high-energy microsecond and millisecond pulses with repetition rates ranging from tens of hertz to several kilowatts, achieving average and peak powers of several kilowatts. Therefore, it is increasingly used in precision welding.
Can Horizontal stack laser be customized?
Horizontal stack laser diode system product customization options include wavelength selection, electronic driver design, firmware and software modifications, mechanical design, fiber pigtailing for laser diodes and laser modules, and more.
Brandnew Lasers is uniquely positioned for rapid development with extensive laser characterization and in-house prototyping capabilities and experience. Brandnew Lasers headquarters features electronics and laser R&D facilities, a full-service machine shop, and a large inventory of components.
Our team has the flexibility to design electronic and optical systems to provide the best solution for your laser system specifications to maximize performance and minimize costs. With extensive engineering experience, Brandnew can provide a wide range of custom modules, making it a reliable partner for industrial and laboratory facilities.
BrandNew's Horizontal Stacked Array can be customized with or without FAC, such as 808nm 200W Conduction Cooled Horizontal Array Diode Laser, 808nm 600W Conduction Cooled Horizontal Array Diode Laser FAC, FAC to make the beam more shaped, we can also customize the horizontal stacked array for micro-channel, such as 792nm 400W micro channel horizontal array diode laser. water cooling or conduction cooling can be customized, such as 808nm 480W Water Cooled Horizontal Stack Diode Laser, 808nm 1500W Conduction Cooled Horizontal Array Diode Laser, 808nm 1600W Conduction Cooled Horizontal Array Diode Laser, 808nm 2000W Conduction Cooled Horizontal Array Diode Laser, 808nm 2400W Conduction Cooled Horizontal Array Diode Laser, 808nm 3000W Conduction Cooled Horizontal Array Diode Laser, 808nm 4800W Conduction Cooled Diode Laser, 808nm 100W Conduction Cooled Horizontal Stack Diode Laser, . If you want CW or QCW effect, we can also customize it for you, such as 808nm 200W CW Water Cooled Horizontal Stack Diode Laser, 808nm 400W QCW Conduction Cooled Horizontal Stack Laser. Let each item reflect the unique style of the product! Our customizable products give you the freedom to choose the function, material and design. Whether it's for a project need or for your own use, it's a one-of-a-kind choice.
Precautions For The Use Of Laser Diodes
The laser light emitted from this Device is invisible and will harmful to the human eye. Avoid looking directly into the fiber output or into the collimated beam along its optical axis when the device is in operation. Proper laser safety eyewear must be worn during operation.
Absolute Maximum Ratings may be applied to the Device for short period of time only. Exposure to maximum ratings for extended period of time or exposure above one or more max ratings may cause damage or affect the reliability of the Device.
Operating the product outside of its maximum ratings may cause device failure or a safety hazard. Power supplies used with the device must be employed such that the maximum peak optical power cannot be exceeded. A proper heat sink for the Device on thermal radiator is required, sufficient heat dissipation and thermal conductance to the heat sink must be ensured.
The Device is an Open-Heat sink Diode Laser; it may be operated in clean room atmosphere or dust-protected housing only. Operating temperature and relative humidity must be controlled to avoid water condensation on the laser facets. Any contamination or contact of the laser facet must be avoided.
ESD PROTECTION – Electrostatic discharge is the primary cause of unexpected product failure. Take extreme precaution to prevent ESD. Use wrist straps, grounded work surfaces and rigorous antistatic techniques when handling the product.
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Brandnew Technology, one of the leading diode laser manufacturers and suppliers in China, has a professional factory which manufacturers high quality horizontal stack diode laser, micro-channel diode laser, macro-channel diode laser, water cooled diode laser, horizontal array diode laser, stack bar diode laser and sells at competitive price. Welcome to wholesale our products made in China.
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