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CO2 Laser Division |
| Item#CO2-25W | 25Watt CO2 Laser Tube (OEM) | $375 each | |
| Item#CO2-40W | 40Watt CO2 Laser Tube (OEM) | $550 each | |
| Item#KDC-20PS | 25Watt CO2 Power Supply | $495 each | |
| Item#KDC-40PS | 40Watt CO2 Power Supply | $550 each | |
| Item#CO2-Pump | 12VDC coolant pump for any tube | $20 each | |
| Item#SHIPPING1 | Add to your cart for each Tube Ordered. This is for shipping within the Cont. USA. | $35 each | |
| Item#SHIPPING2 | Add to your cart for each Power Supply Ordered. Shipping & Handling in USA. | $22 each | |
| Item#SHIPPING3 | Foreign Customer Shipping Charge Per Tube or Power Supply. For UPS or EMS Expedited anywhere UPS or USPS ships. | $150 each | |
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All Shipments are shipped upon payment approval. All laser tubes will be double boxes which exceeds UPS shipping and packing guidelines. All tubes will be insured to full value. Power supply and tube will ship in separate boxes. |
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Scroll down for more pictures.
This brand new, sealed CO2 laser tube operates at 25watts RMS output energy.
Detailed Specs for OEM CO2 laser tubes:
Length= 730mm
Power Output= 25W RMS
Trigger Voltage= 15-19KV
Operating Voltage= 9-11KV
Operating Current= 15-22mA
Outer Diameter= 50 +/-3mm
Power Stability= </=10%
TEM Mode= TEM00
Output Beam Diameter= 5.5mm +/-0.5mm
Operating Lifespan= 10,000-12,000hrs
Scroll down for more pictures.
This brand new, sealed CO2 laser tube operates at 40watts RMS output energy.
Detailed Specs for OEM CO2 laser tubes:
Length= 1000mm
Power Output= 40W RMS
Trigger Voltage= 20-25KV
Operating Voltage= 12-15KV
Operating Current= 25-30mA
Outer Diameter= 50 +/-3mm
Power Stability= </=10%
TEM Mode= TEM00
Output Beam Diameter= 7mm +/-0.5mm
Operating Lifespan= 10,000-12,000hrs
Sealed Gas tube only requires power and water/antifreeze for cooling. It is ready to go out of the box, optics are optional for focusing the beam to a fine point, it will operate and cut materials right out of the box - so nothing more is required. Use a focusing lens to extend beam and focus power.
Used in the industry for cutting, welding, etching, melting, cleaning, woodwork, glasswork, plastic work, art, surgery and many other applications. These tubes are used as OEM replacements in engraving, cutting and medical systems.
Laser tube comes with silicon tube installed to make end use easier. As you can see in the pictures this industrial cutting laser tube has sealed internal water cooled lenses for Long life and improved operation. The anode and cathode are made of inert metals for better conductivity and longer electrode life.
Below you can see a 16watt tube lasing in the pictures below.
We show it in IR view and Regular color view for details... Burning a chunk of rubber.
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KDC-2O, KDC-40, KDC-60 CO2 Power Supply Main Tech Parameters
Item may vary in color from picture.
1. Input: AC 110V±l0%
2. Max Output: DC 20KV l6mA, DC 22KV 22mA, DC 25KV 25mA
3. Instability: ±5%
4. Control TTL (5V)
5. Laser Power Adjustment: Use 10K ohm potentiometer To Adjust output Current
6. Use Temperature (5~3O)°C, Humidity: 30%~70%
7. LxWxH: 280x250x145mm, 300x320x145mm, 320x340x145mm
8. Weight: 3Kg, 5Kg, 6Kg
Operation of Power supply:
The power supply cannot be used with a load, it may cause damage or shock.
1. Power supply should be connected to CO2 laser tube using only high voltage rated wires. Good solid connections should be used. No alligator clips.
2. Input is AC 110Vac, the power supply will go into standby mode.
3. Connect the Red positive wire to the anode or non-emitting end of the tube. Connect the black negative wire to the cathode or beam output end of the tube.
4. Connect an on/off key switch to pins 6 & 7 to turn unit on or off.
5. Connect a 10K ohm potentiometer to pins 1, 2 & 3 to vary the output power.
6. Connect 5V TTL signal from your computer or CNC machine to pins 4 & 5 for pulse operation.
7. Use eye protection, Do not touch wires or contacts during operation. Make sure to discharge power supply before servicing or touching wires to avoid shock.
Laser Information regarding Beams, Focal Length and Modes:
Section 2.7: TEM Mode, Beam Diameter, Focal Spot Size and Depth of Focus
Modes are the standing oscillating electromagnetic waves which are defined by the cavity geometry. In the above section, we already computed the Longitudinal Modes frequencies for some simple cases. If the cavity is of closed form, i.e., both the mirrors and side walls are reflective, there will be large amounts of longitudinal modes oscillating inside the cavity, a typical value can be 109 modes for a He-Ne laser. People had thought closed form could improve the output power, but it turns out that the output beam can not be well focused for closed cavities with so many modes. So open oscillators are used, whose lateral walls are not reflective, light incident on this part will be absorbed. This can reduce the possible longitudinal modes to only a few, for example, as low as 6!
When these modes oscillate, they interfere with each other, forming the transverse standing wave pattern on any transverse intersection plane. This mechanism decides the Transverse Electromagnetic Modes (TEM) of the laser beam, which is the wave pattern on the output aperture plane. We use the sign TEMpql to specify a TEM mode, where p is the number of radial zero fields, q is the number of angular zero fields, q is the number of longitudinal fields, and we usually use TEMpq to specify a TEM mode, without the third index. A table of TEM patterns is shown below. Clearly, the mode pattern affects the distribution of the output beam energy, which will thus affect the machining process.
Then what is the diameter of a laser beam? Usually this diameter is defined as the distance within which 1/e2 of the total power exists.
The higher the order of the mode, the more difficult it is to focus the beam to a fine spot, since the beam of higher order is not from a virtual point, but from patterns as those in the table below.
Table 2.14: Table of modes
Focal Spot Size:
Focal spot size determines the maximum energy density that can be achieved when the laser beam power is set, so the focal spot size is very important for material processing.
When a beam of finite diameter D is focussed by a lens onto a plane, the individual parts of the beam striking the lens can be imagined to be point radiators of new wave front. The light rays passing through the lens will converge on the focal plane and interfere with each other, thus constructive and destructive superposition take place, light energy is distributed as described in figure????? below. The central maximum contains about 86% of the total power.
Figure 2.15: Focus pattern of parallel light
The focusing diameter is measured between the points where the intensity has fallen to 1/e2 of the central peak value. For a rectangular beam with a plane wave front, the diffraction limited beam diameter, which is the smallest focal diameter, is given by:
dmin = fl /D
For a circular beam, the equation is:
dmin = 2.44fl /D, you can try the interactive figure below to see the influnce of l and D on dmin.
For multi-mode beam TEMplq, the focal spot size is larger than the above two values. The smallest possible focal sopt size in this case is:
dmin = 2.44fl (2p+l+1)/D
Where f is the lens focal length, D is the beam diameter, l is wavelength of the light, p, l is the mode number. From this equation, we can clearly see the influence of modes to the focal property.
There are other factors that affect focal spot size, such as spherical aberration and thermal lensing effects. Most lenses are made with a spherical shape, but they cannot be of perfect shape, there exist spherical aberration. Lenses in laser systems transmit or reflect high power laser radiation, laser power variations can cause shape changes of the lenses, so the focal point will change when the radiation power changes, thus affect the focal spot size.
We prefer small focal spot size. We find the focal diameter is related to beam mode, wavelength, beam diameter and focus. How do they affect the focal spot size? You can try!
G2.8: Relations between wavelength, input beamsize and Minimum Focal Spot Size
Depth of Focus (DOF):
The laser light is first converged at the lens focal plane, then diverges to wider beam diameter again. The depth of focus is the distance over which the focussed beam has about the same intensity, it is defined as the distance over which the focal spot size changes –5%~5%. The equation for DOF is:
DOF=(8l /p )(f/D)2=2.44l (f/D)2
Where l is the wavelength, f is the lens focal length, D is the unfocussed beam diameter.
Figure 2.16: The DOF (Depth of Focus) of laser light
Usually longer depth of focus is preferred, because equal energy density along the beam is preferred when using the laser to process materials.
Receiving electromagnetic radiation by interaction with the material, and transforming it to different form, which is usually heat. The absorption process is dependent on the wavelength of the electromagnetic radiation and on the absorbing material.
Collection of atoms or molecules which can be stimulated to a population inversion, and emit electromagnetic radiation in a stimulated emission. Amplification The process in which the electromagnetic radiation inside the active medium within the laser optical cavity increase by the process of stimulated emission.
The maximum value of a wave, measured from its equilibrium.
A small opening through which the electromagnetic radiation pass.
The decrease in radiation energy (power) as a beam passes through an absorbing or scattering medium.
Defined as the diameter of a circular beam at a certain point where the intensity drop to a fraction of its maximum value. The common definitions are 1/e (0.368) and 1/e2 (0.135) of the maximum value.
Angle of beam spread, measured in (milli)radians. Can be approximated for small angle by the ratio of the beam diameter to the distance from the laser aperture.
Any object surface can radiate heat to and receive heat from outside, if an object can absorb all the incident radiation, regardless of the frequencies and directions, this object is called Black Body. A ball cavity with a small hole can be regarded as a black body, since any radiation entering the ball cavity can only reflect inside it, thus totally absorbed.
The brightness of a light source is defined as the power emitted per unit surface area per unit solid angle.
Coherence can be devided into spatial and temporal coherence. For any em wave, if at time t=0 and t0 the phase diference between two points in space remains the same, we say the em wave has spatial coherence; If at a point P, the em wave at t and t+dt has same phase difference if dt is the same, temporal coherence exists.
Composite
A "matrix" and an additional phase or additional phases consisting of particles, whiskers, fibres or any combination thereof, present for a specific purpose or purposes.
The depth of focus is the distance over which the focussed beam has about the same intensity, it is defined as the distance over which the focal spot size changes -5%~5%.
Electronic assembly
A number of electronic components (i.e., "circuit elements", "discrete components", integrated circuits, etc.) connected together to perform (a) specific function(s), replaceable as an entity and normally capable of being disassembled.
Evaporative Laser Cutting
Evaporative laser cutting is the laser cutting process that target material is ablated through direct vaporization, typical applications are laser cutting of low vaporization temperature and low thermal conduction materials.
Lasers which use the noble gas compounds for lasing. Excimer lasers generate laser light in ultraviolet to near-ultraviolet spectra, from 0.193 to 0.351 microns. Gas Laser A laser in which the active medium is gas. The gas can be composed of molecules (like CO2), Atoms (like He-Ne), or ions (like Ar+).
Laser Fusion cutting
Laser fusion cutting is laser cutting through melting and gas jet blowing.
Lowest energy level of an atom or molecule.
Heat affected zone is the region close to the laser irradiated area that obvious temperature change from original area happens, or obvious strain state change happens.
An interference phenomena captured on a plate (or film). It can contain enormous amount of information and a 3 dimensional image can be constructed from it.
In laser processeing, strong evaporation occurs. The gas near the phase interface is not in translational equilibrium and the translational equilibrium is achieved within a few mean free paths by collisions between particles in a thin region. This region is called Knudsen layer
Laser is the acronym of Light Amplification by Stimulated Emission of Radiation. Laser is light of special properties, light is electromagnetic (EM) wave in visible range. Lasers, broadly speaking, are devices that generate or amplify light, just as transistors generate and amplify electronic signals at audio, radio or microwave frequencies. Here light must be understand broadly, since lasers have covered radiation at wavelengths ranging from infrared range to ultraviolet and even soft x-ray range.
Laser machining is material removal accomplished by laser material interaction, generally speaking, these processes include laser drilling, laser cutting and laser grooving, marking or scribing.
Laser mode is the possible standing em waves in laser cavity.
Axial standing em waves within the laser cavity.
Laser Resonator or Laser Cavity
The optical mirrors, active medium and pumping system form the laser resonator, which is also called Laser Cavity. Laser cavities can be divided into Stable Cavities and Unstable Cavities according to whether they make the oscillating beam converge into the cavity or spread out from the cavity.
The linewidth of laser is the width of laser beam frequency. Laser linewidth is much narrower than normal light.
Lasers which use large organic dye molecules as the active lasing medium.
M2 is a beam quality index that measures the difference between an actual beam and the Gaussian beam.
Matrix
A substantially continuous phase that fills the space between particles, whiskers or fibres.
Liquid surface force due to temperature gradient (thermal) or composition gradient (chemical)
Microcircuit
A "monolithic integrated circuit" or "multichip integrated circuit" containing an arithmetic logic unit (ALU) capable of executing a series of general purpose instructions from an external storage. N.B.1: The "microprocessor microcircuit" normally does not contain integral user-accessible storage, although storage present on-the-chip may be used in performing its logic function. N.B.2: This definition includes chip sets which are designed to operate together to provide the function of a "microprocessor microcircuit".
Multichip
A "integrated circuit" where two or more "monolithic integrated circuits" bonded to a common "substrate".
A method to create very short laser pulses. It makes the phase difference of many modes (frequencies) in the laser cavity fixed, or locked, thus very narrow pulses (in time) are created.
Phase changes happen over a temperature region in general, thus solid and liquid state coexist during phase changes. The region of this mixture of solid and liquid is called Mushy region.
The minimum quantity of light energy that can be exchanged is called a light quantum or photon.
If the light has a dominant direction of the E vector, we say the light is polarized. Natural light is not polarized, while laser beam is polarized. Polarization can be created and adjusted by polarizer.
Normally the number of atoms at high energy level(E1) is less than those in low energy level(E1), N2(E2) < N1(E1). If N2>N1, we say population inversion exists, which is a necessary condition for lasing.
The process to raise atoms from lower level to upper level is called pumping.
A method to create laser pulses. It modualates the Q (Quality) of laser cavity to build population inversion first, then release the accumulated energy suddenly, in this way high energy pulses can be created.
In semiconductors, when the electrons combine with the holes, photons are emitted, this is called Recombination Radiation.Semiconductor Lasers are based on this mechanism.
The least increment of a measuring device; on digital instruments, the least significant bit. (Reference: ANSI B-89.1.12)
A laser in which the active medium is in solid state (usually not including semiconductor lasers).
Lasers which use semiconductor as active medium. The majority of semiconductor materials are based on a combination of elements in the third group of the Periodic Table (such as Al, Ga, In) and the fifth group (such as N, P, As, Sb) hence referred to as the III-V compounds.
According to quantum mechanics, the electrons of atoms can take different energy states, say E1, E2, E3, etc., E1<E2<E3<…. Lower energy level is more stable than higher energy levels, so electrons at high energy levels tend to decay to low energy levels, the energy difference between the two levels can be given out as electromagnetic radiation. This process is called Spontaneous Radiation.
Stable Cavity and Unstable Cavity
Cavities can be identified as stable or unstable according to whether they make the oscillating beam converge into the cavity or spread out of the cavity, if converge it is stable, if spread out, it is unstable.
When the atoms at lower energy levels absorb the incident energy with corresponding frequency, they jump to upper level states, this is called Stimulated Absorption.
Under the action of the incident electromagnetic field with the corresponding frequency, the atoms at upper level have a certain possibility to jump to the corresponding lower levels, emitting electromagnetic waves or photons with the same frequency, direction and phase with the incident waves. This process is called Stimulated Emission.
Substrate
A sheet of base material with or without an interconnection pattern and on which or within which "discrete components" or integrated circuits or both can be located.
Superalloy
Nickel-, cobalt- or iron-base alloys having strengths superior to any alloys in the AISI 300 series at temperatures over 922 K (649º C) under severe environmental and operating conditions.
Transverse Electromagnetic Mode (TEM) of laser beam is called TEM mode. Three index are used to indicate the TEM modes. TEMplq, p is the number of radial zero fields, l is the number of angular zero fields, q is the number of longitudinal fields.
YAG
yttrium/aluminum garnet
Laser whose pulse duration time is very short, below 1 ns, usually in the fs scale.
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