Next, check to see if the numerical aperture (NA) of the diode is smaller than the NA of the lens: 0.30 = NALens > NADiode ≈ sin(15°) = 0.26. The maximum ratings mean the limitation over which the laser should not be operated even instant time. When an optic is damaged by a continuous wave (CW) laser, it is usually due to the melting of the surface as a result of absorbing the laser's energy or damage to the optical coating (antireflection) [1]. To collimate light using one of our mounted aspheric lenses, orient the housing so that the externally threaded end of the mount faces the source. This lens also has a clear aperture that is larger than the collimated beam diameter. 3. Mark Frederick (posted 2020-09-08 20:42:37.227) What is the window thickness of the L638P200? Thorlabs offers a large selection of aspheric lenses. LDM Series Laser Diode Modules Chapter 3: Description Chapter 3 Description The LDM Series of compact laser sources are well suited to benchtop optical experiments. Shop 10,000 + Laser Diodes, Modules & Systems. Now compare the maximum power density to that which is specified as the LIDT for the optic. Pulsed lasers, on the other hand, often strip electrons from the lattice structure of an optic before causing thermal damage. This wavelength and laser type is used more than any other in the blue range. Note that the guideline presented here assumes room temperature operation and optics in new condition (i.e., within scratch-dig spec, surface free of contamination, etc.). A histogram such as that below represents the testing of one BB1-E02 mirror. Click on the red Document icon next to the item numbers below to access the Zemax file download. The energy density of your beam should be calculated in terms of J/cm2. Please note that we have a buffer built in between the specified damage thresholds online and the tests which we have done, which accommodates variation between batches. Specific material properties for each lens can be found by clicking on the Info Icon  in the tables below and selecting the Glass tab. In CW applications, for instance, damage scales more strongly with absorption in the coating and substrate, which does not necessarily scale well with wavelength. Since the output of a laser diode is highly divergent, collimating optics are necessary. Aspheric Lens in a Fiber Launch Application. Links to the files can be found by clicking on the item number in the price tables below. Thorlabs recommends the use of safety eyewear whenever working with laser beams with non-negligible powers (i.e., > Class 1) since metallic tools such as screwdrivers can accidentally redirect a beam. Thorlabs' Enclosure Systems can be used to contain optical setups to isolate or minimize laser hazards. This process is repeated until damage is observed. Firmly tighten the clamps using the locking screws. The blue Info button next to the part number within the table opens a pop-up window, which contains in-depth information regarding the diode. Upon request, we can provide individual test information and a testing certificate. The laser should be of f when plugging or un -plugging the connector. Assuming that the width of the lens is negligible compared to the radius of curvature, the thin lens approximation can be used to determine the appropriate focal length for the asphere. The collimated output has a Ø3 mm round beam profile at 50 mm from the housing. While the above procedure provides a good rule of thumb for LIDT values, please contact Tech Support if your wavelength is different from the specified LIDT wavelength. Thorlabs' LIDT testing is done in compliance with ISO/DIS 11254 and ISO 21254 specifications.First, a low-power/energy beam is directed to the optic under test. This specification should be matched to the diffraction-limited spot size given by the following equation: Here, f is the focal length of the lens, λ is the wavelength of the input light, and D is the diameter of collimated beam incident on the lens. From optomechanical components to telecom test instrumentation, Thorlabs' extensive manufacturing capabilities allow us to ship high quality, well priced components and devices for next-day delivery. For beams with a high PRF both the average and peak powers must be compared to the equivalent CW power. Thorlabs specializes in the building blocks for laser and fiber optic systems. You must now consider hotspots in the beam or other non-uniform intensity profiles and roughly calculate a maximum power density. The mounted aspheres are readily adapted to our SM1 series of lens tubes by using our Aspheric Lens Adapters. Now compare the maximum energy density to that which is specified as the LIDT for the optic. HIGH-POWER, LASER LINE, POLARIZING BEAMSPLITTER CUBES, MOUNTED Hide Overview Click for Details The engraving on the mount indicates the item # and one of the two preferred beam paths. The graph to the right shows why expressing the LIDT as an energy density provides the best metric for short pulse sources. www.thorlabs.com Specifications subject to change without notice. Each USB-equipped laser module has collimated output at 520 or 635 nm, an on/off switch, and a built-in highly attenuating electrical filter to eliminate noise in the laser output, regardless of the power supply used. Unfortunately, this is highly dependent on factors such as absorption and thermal diffusivity, so there is no reliable method for determining when a high PRF laser will damage an optic due to thermal effects. 405nm Blue Laser Diode Definition : The most common blue laser is a 405nm semiconductor diode laser. Therefore, as the light diverges, an elliptical beam will result. Features High Damage Threshold: >10 J/cm 2 Available for 405 nm, 532 nm, 633 nm, 780 - 808 nm, or 1064 nm Wavelengths Optical Contact at Beamsplitter Interface After screwing the ECM225 clamps to any convenient base or post, such as one of Thorlabs’ TR series optical posts, snap the clamps on to the bottom side of the NPL housing. Thorlabs specializes in the building blocks for laser and fiber optic systems. 12, 661 (1973). Thorlabs' LIDT testing is done in compliance with ISO/DIS 11254 and ISO 21254 specifications. For more information on cleaning optics, please see our Optics Cleaning tutorial. An "X" in any of the five AR Coating Columns indicates the lens is available with that coating (note that the V coating availability is indicated with the design wavelength). While many optics can handle high power CW lasers, cemented (e.g., achromatic doublets) or highly absorptive (e.g., ND filters) optics tend to have lower CW damage thresholds. For long pulses to CW, linear power density becomes a constant with spot size. The Item # listed is that of the unmounted, uncoated lens. When comparing an LIDT specified for a pulsed laser to your laser, it is essential to know the following: LIDT in energy density vs. pulse length and spot size. Alternatively, if the clear aperture of the aspheric lens is large enough, the beam can be expanded before the aspheric lens, which has the result of reducing the spot size of the focus beam. Mounted aspheres can be used as a drop-in replacement for multi-element microscope objective by combining the lens with our Microscope Objective Adapter Extension Tube. Low Power Violet Laser Diode - WSLD-405-200m-1 has the following features: Wavelength is 405 nm (400 nm - 410 nm), Output Power is 200 mW, FP Laser Diode, TO-can, and more. The calculation above assumes a uniform beam intensity profile. The following is a general overview of how laser induced damage thresholds are measured and how the values may be utilized in determining the appropriateness of an optic for a given application. Thorlabs’ Single Mode Pigtailed Laser Diodes are standard TO-packaged diodes that have been pigtailed to a 1 m long single mode fiber with an FC/PC connector. [2] Roger M. Wood, Laser-Induced Damage of Optical Materials (Institute of Physics Publishing, Philadelphia, PA, 2003). For data presented here, a <1 mm beam size was used to measure the LIDT. The longer the pulse duration, the more energy the optic can handle. A good rule of thumb is that the damage threshold has a linear relationship with wavelength such that as you move to shorter wavelengths, the damage threshold decreases (i.e., a LIDT of 10 W/cm at 1310 nm scales to 5 W/cm at 655 nm): While this rule of thumb provides a general trend, it is not a quantitative analysis of LIDT vs wavelength. For short pulses, energy density becomes a constant with spot size. While the LIDT, when expressed in units of J/cm², scales independently of spot size; large beam sizes are more likely to illuminate a larger number of defects which can lead to greater variances in the LIDT [4]. The L405P150 from Thorlabs Inc is a Laser Diode with Wavelength 405 nm, Output Power 0.15 W, Operating Voltage 4.9 to 5.5 V, Operating Current 0.138 to 0.17 A, Output Power (CW) 0.15 W. More details for L405P150 can be seen below. www.thorlabs.com Specifications subject to change without notice. In general, using a collimating lens with a short focal length will result in a small collimated beam diameter and a large beam divergence, while a lens with a large focal length will result in a large collimated beam diameter and a small divergence. Figure 4 shows an example of an NPL laser head mounted on an optical table. The damage threshold is then assigned to be the highest power/energy that the optic can withstand without causing damage. If the optic was tested at a wavelength other than your operating wavelength, the damage threshold must be scaled appropriately [3]. For pulse widths between 1 - 100 ns, an approximation is as follows: Use this formula to calculate the Adjusted LIDT for an optic based on your pulse length. These mounted aspheres have a metric thread that makes them easy to integrate into an optical setup or OEM application. The LIDT for an optic greatly depends on the type of laser you are using. As a result, if an aspheric lens is not available that provides an exact match, then choose the aspheric lens with a focal length that is shorter than the calculation above yields. EFL = Effective Focal LengthNA = Numerical ApertureCA = Clear Aperture, WD = Working DistanceDW = Design Wavelength, Molded Glass Aspheric Lenses, 405 nm or 1064 nm AR Coating, f = 4.02 mm, NA = 0.6, Unmounted Geltech Aspheric Lens, AR: 405 nm, f = 4.02 mm, NA = 0.6, Mounted Geltech Aspheric Lens, AR: 405 nm, f = 4.51 mm, NA = 0.551, Unmounted Geltech Aspheric Lens, AR: 1064 nm, f = 4.51 mm, NA = 0.551, Mounted Geltech Aspheric Lens, AR: 1064 nm, f = 6.24 mm, NA = 0.40, Unmounted Geltech Aspheric Lens, AR: 1064 nm, f = 6.24 mm, NA = 0.40, Mounted Geltech Aspheric Lens, AR: 1064 nm, f = 8.00 mm, NA = 0.50, Unmounted Geltech Aspheric Lens, AR: 1064 nm, f = 8.00 mm, NA = 0.50, Mounted Geltech Aspheric Lens, AR: 1064 nm, f = 11.00 mm, NA = 0.25, Unmounted Geltech Aspheric Lens, AR: 1064 nm, f = 11.00 mm, NA = 0.25, Mounted Geltech Aspheric Lens, AR: 1064 nm, f = 18.40 mm, NA = 0.15, Unmounted Geltech Aspheric Lens, AR: 1064 nm, f = 18.40 mm, NA = 0.15, Mounted Geltech Aspheric Lens, AR: 1064 nm, Aspheric Lenses: Molded & Precision Polished, Microscope Objective Adapter Extension Tube, Plastic Aspheres: Uncoated 80-50 Scratch-Dig, Plastic Aspheres: AR Coated 80-50 Scratch-Dig. All of these molded glass lenses are also available premounted in non-magnetic 303 stainless steel lens cells that are engraved with the part number for easy identification. The TC12FC-405 from Thorlabs Inc is a Collimator with Wavelength Range 404 to 406 nm, Focal Length 11.14 mm. Continuous wave (CW) lasers typically cause damage from thermal effects (absorption either in the coating or in the substrate). Aspheric lenses are designed to focus or collimate light without introducing spherical aberration into the transmitted wavefront. This graph was obtained from [1]. These compact instruments consist of a laser head, an external +15 V power supply with … A good rule of thumb is to pick a lens with an NA twice that of the laser diode NA. Unfortunately, it can be very difficult to compare the LIDT specification of an optic to your laser. The laser should be of f when plugging or un -plugging the connector. A simple example will illustrate the key specifications to consider when choosing the correct lens for a given application. ¾|Rö×ØZOµÝÿóÕßë]ûýr֎¹c”A¬.Jû1er³Tÿ?ÞûöÝ¿§sV/§L–~¶)K:e_p‚¤ãó#Ÿ~ïïõËþ€…4ñvD Ԅöô² _Ò¯¤î²ðÓBéFéØb,]ˆ`¤~íJê×gJˆ¡½0ô*ÓsìÉX„QËò1¦zߏ9¸ òðÇæïÀ½B֓_¿ËÔÊÄärܛ_šÉß~GYtB. Clicking on the X takes you to the landing page where that lens (mounted or unmounted) can be purchased. In this regime, the LIDT given as an energy density can be applied to any beam diameter; one does not need to compute an adjusted LIDT to adjust for changes in spot size. The specifications for the P1-630A-FC-2, 630 nm, FC/PC single mode patch cable indicate that the mode field diameter (MFD) is 4.3 μm. 91, 127402 (2003). This calculation assumes a uniform beam intensity profile. The molding process will cause the properties of the glass (e.g., Abbe number) to deviate slightly from those given by glass manufacturers. Safe Practices and Light Safety Accessories. The aspheric lens with a focal length that is closest to 16 mm has a focal length of 15.29 mm (Item# 354260-B or A260-B). The number of locations that are damaged at a particular power/energy level is recorded. If your maximum energy density is less than this adjusted LIDT maximum energy density, then the optic should be suitable for your application. The table below lists basic specifications. Pulsed lasers with pulse lengths longer than 1 µs can be treated as CW lasers for LIDT discussions. When pulse lengths are between 1 ns and 1 µs, laser-induced damage can occur either because of absorption or a dielectric breakdown (therefore, a user must check both CW and pulsed LIDT). The table to the right defines each letter and lists the specified AR coating range. To collect as much light as possible during the collimation process, consider the larger of these two divergence angles in any calculations (i.e., in this case, use 30°). Important Notes: 1. As previously stated, pulsed lasers typically induce a different type of damage to the optic than CW lasers. Next, the power/energy is either increased or decreased and the optic is exposed at 10 new locations. The optic is exposed in 10 locations to this laser beam for 30 seconds (CW) or for a number of pulses (pulse repetition frequency specified). Testing may result in additional costs or lead times. From optomechanical components to telecom test instrumentation, Thorlabs' extensive manufacturing capabilities allow us to ship high quality, well priced components and devices for next-day delivery. In order to use the specified CW damage threshold of an optic, it is necessary to know the following: Thorlabs expresses LIDT for CW lasers as a linear power density measured in W/cm. The specifications for the L780P010 laser diode indicate that the typical parallel and perpendicular FWHM beam divergences are 10° and 30°, respectively. For our selection of IR molded aspheres, click here. There are multiple regimes in which a pulsed laser can damage an optic and this is based on the laser's pulse length. These 1/2 (12.7 mm) and 1 (25.4 mm) cubes have a dielectric V-coating on four faces that minimizes re These lenses each have a focal length of 4.6 mm, resulting in an approximate major beam diameter of 2.5 mm. You must now adjust this energy density to account for hotspots or other nonuniform intensity profiles and roughly calculate a maximum energy density. Thorlabs' Nanosecond Pulsed Laser Diode Systems are designed to provide a convenient, turnkey source of nanosecond pulse trains at repetition frequencies up to 10 MHz. From optomechanical components to telecom test instrumentation, Thorlabs' extensive manufacturing capabilities allow us to ship high quality, well priced components and devices for next-day delivery. Therefore, this aspheric lens is the best option given the initial parameters (i.e., a P1-630A-FC-2 single mode fiber and a collimated beam diameter of 3 mm). Thorlabs specializes in the building blocks for laser and fiber optic systems. Contact Tech Support for more information. This graph was obtained from [1]. These modules offer single-spatial-mode output in com The clear aperture of the unmounted lens is different on either side. Average linear power density can be calculated using the equation below. EFL is specified at 1064 nm rather than at the design wavelength. The highlighted columns in the table below outline the relevant pulse lengths for our specified LIDT values. If an unmounted aspheric lens is being used to collimate the light from a point source or laser diode, the side with the greater radius of curvature (i.e., the flatter surface) should face the point source or laser diode. When choosing a collimation lens, it is essential to know the divergence angle of the source being used and the desired output diameter. Remember, for optimum coupling the spot size of the focused beam must be less than the MFD of the single mode fiber. If your power density is less than the adjusted LIDT of the optic, then the optic should work for your application. Click to view item-specific focal length shift data and spot diagrams at various wavelengths. Our entire, Uncoated: Optics Do Not have an AR Coating, Broadband AR Coating for the 350 - 700 nm or 400 - 600 nm Range, Broadband AR Coating for the 600 - 1050 nm or 650 - 1050 nm Range, Broadband AR Coating for the 1050 - 1620 nm or 1050 - 1700 nm Range, Narrowband AR Coating Designed for the Wavelength Listed in the Table Below, Collimate or Focus Light with a Single Element, Positive Radius Indicates that the Center of Curvature is to the Right of the Lens, Negative Radius Indicates that the Center of Curvature is to the Left of the Lens, Desired Collimated Beam Diameter: Ø3 mm (Major Axis), Approximate intensity profile of your beam (e.g., Gaussian), Linear power density of your beam (total power divided by 1/e, Energy density of your beam (total energy divided by 1/e, Pulse repetition frequency (prf) of your laser. The pulse length must now be compensated for. Thus, an aspheric lens is often the best single element solution for many applications including collimating the output of a fiber or laser diode, coupling light into a fiber, spatial filtering, or imaging light onto a detector. [1] R. M. Wood, Optics and Laser Tech. We … EFL is specified at 405 nm rather than at the design wavelength. Please note that we have a buffer built in between the specified damage thresholds online and the tests which we have done, which accommodates variation between batches. Rev. The damage threshold for these lenses is determined by the antireflective (AR) coating. In this ultra-short-pulse regime various mechanics, such as multiphoton-avalanche ionization, take over as the predominate damage mechanism [2]. Opt. Please keep in mind that these tests are performed on clean optics, as dirt and contamination can significantly lower the damage threshold of a component. Threshold Current referenced on the attached data sheet is 30 mA with slope efficiency of 0.25. Diodes are arranged by wavelength and then power. S405-XP - Single Mode Optical Fiber, 400 - 680 nm, Ø125 µm Cladding After exposure, the optic is examined by a microscope (~100X magnification) for any visible damage. Thorlabs specializes in the building blocks for laser and fiber optic systems. A simple example will illustrate the key specifications to consider when trying to choose the correct lens. I have reached out to you directly to discuss the possibility of getting a custom laser. The 1/e2 beam diameter therefore captures more of the laser diode's output light (for greater power delivery) and minimizes far-field diffraction (by clipping less of the incident light). When choosing optics, it is important to understand the Laser Induced Damage Threshold (LIDT) of the optics being used. Aspheric lenses do not introduce spherical aberration and are therefore are commonly chosen when the collimated laser beam is to be between one and five millimeters. A fiber-pigtailed laser should always be turned off before connecting it to or disconnecting it from another fiber, especially when the laser is at power levels above 10 mW. According to the test, the damage threshold of the mirror was 2.00 J/cm2 (532 nm, 10 ns pulse, 10 Hz, Ø0.803 mm). Important Notes: 1. For reference, a Gaussian beam typically has a maximum power density that is twice that of the uniform beam (see lower right). If you wish to convert your elliptical beam into a round one, we suggest using an Anamorphic Prism Pair, which magnifies one axis of your beam. Multimode Pigtails at 405 nm, 462 nm, 520 nm, 635 nm, or 658 nm Center Wavelength Internal 8° Angle-Cleaved Fiber FC/PC (2.0 mm Narrow Key) or SMA905 Connector 1 m of MM Fiber Custom Pigtails Available Upon Request This webpage contains Thorlabs' pigtailed laser diodes with multimode (MM) fiber. Pulsed lasers with high pulse repetition frequencies (PRF) may behave similarly to CW beams. The C171TMD-B (mounted) or 354171-B (unmounted) aspheric lenses have a focal length of 6.20 mm, which will result in a collimated beam diameter (major axis) of 3.3 mm. Solving for the desired focal length of the collimating lens yields. Pigtailed Laser Diode, SMF from Thorlabs. Molded glass aspheres are manufactured from a variety of optical glasses to yield the indicated performance. The optic is exposed in 10 locations to this laser beam for 30 seconds (CW) or for a number of pulses (pulse repetition frequency specified). Pulsed lasers often do not heat the optic enough to damage it; instead, pulsed lasers produce strong electric fields capable of inducing dielectric breakdown in the material. While the test results are only representative of one coating run, Thorlabs specifies damage threshold values that account for coating variances. For reference a Gaussian beam typically has a maximum energy density that is twice that of the 1/e2 beam. First, a low-power/energy beam is directed to the optic under test. This working distance is measured from the lens to the window of the laser diode being collimated (not the emission point). As a guideline these coatings can withstand 100 W/cm2 CW input power or 0.1 J/cm2 with 10 ns pulse energy at 1064 nm. For a Gaussian beam profile, the 1/e2 diameter is almost equal to 1.7X the FWHM diameter. Please visit the landing page for more details. Contact Tech Support for more information. ; Laser goggles designed for specific wavelengths should be clearly available near laser setups to protect the wearer from unintentional laser reflections. Pulses shorter than 10-9 s cannot be compared to our specified LIDT values with much reliability. The specifications to the right are measured data for Thorlabs' AR-coated molded glass aspheric lenses. These lower thresholds are due to absorption or scattering in the cement or metal coating. Assuming a divergence angle of 30° (FWHM) and desired beam diameter of 3 mm: Note that the focal length is generally not equal to the needed distance between the light source and the lens. ... Popular λ: View Only 405 nm Laser Diodes; Popular λ: View Only 488 nm Laser Diodes; Lett. Aspheric lenses are commonly chosen to couple incident light with a diameter of 1 - 5 mm into a single mode fiber. Compatible with Thorlabs' Laser Diode and TEC Controllers; ... We offer the DL5146-101S 405 nm laser diode in a 5.6 mm package. Up to this point, we have been using the full-width at half maximum (FWHM) beam diameter to characterize the beam. 2. The target values of these constants are available by clicking on the Info Icons below or by viewing the .pdf  and .dxf files available for each lens. These compact laser modules feature a typical output power of 0.9 mW (laser safety Class 2) at a 405 nm, 520 nm, or 635 nm typical center wavelength. The working distance is specified at the design wavelength and is measured from the lens to the window of the laser diode being collimated (not the emission point). For example, either the A390-B or the A390TM-B could be used as these lenses each have an NA of 0.53, which is more than twice the approximate NA of our laser diode (0.26). However, a better practice is to use the 1/e2 beam diameter. More details for TC12FC-405 can be seen below. [3] C. W. Carr et al., Phys. In contrast, pulses between 10-7 s and 10-4 s may cause damage to an optic either because of dielectric breakdown or thermal effects. Thorlabs offers compact laser modules equipped with a USB connector, phono jack, or bare wire leads. The L405G2 from Thorlabs is a 405 nm, 35 mW laser diode suited for a variety of applications, such as fluorescence and spectroscopic measurements, flow cytometry, imaging and microscopy, and materials processing. For beams sizes greater than 5 mm, the LIDT (J/cm2) will not scale independently of beam diameter due to the larger size beam exposing more defects. Because dust or other particles on the surface of an optic can cause damage at lower thresholds, we recommend keeping surfaces clean and free of debris. For monochromatic sources, spherical aberration is often what prevents a single spherical lens from achieving diffraction limited performance when focusing or collimating light. This means that both CW and pulsed damage thresholds must be compared to the laser beam to determine whether the optic is suitable for your application. Product Specifications The maximum ratings mean the limitation over which the laser should not be operated even instant time. The damage analysis will be carried out on a similar optic (customer's optic will not be damaged). In this regime, the LIDT given as a linear power density can be applied to any beam diameter; one does not need to compute an adjusted LIDT to adjust for changes in spot size, as demonstrated by the graph to the right. Damage threshold specifications are constant for all 405 nm or 1064 nm AR-coated molded glass aspheric lenses, regardless of the mounting option or focal length of the lens. A good rule of thumb is that the damage threshold has an inverse square root relationship with wavelength such that as you move to shorter wavelengths, the damage threshold decreases (i.e., a LIDT of 1 J/cm2 at 1064 nm scales to 0.7 J/cm2 at 532 nm): You now have a wavelength-adjusted energy density, which you will use in the following step. Absorption is either due to an intrinsic property of the optic or due to surface irregularities; thus LIDT values are only valid for optics meeting or exceeding the surface quality specifications given by a manufacturer. This web page contains Thorlabs' UV laser diode with a center wavelength at 375 nm. [4] N. Bloembergen, Appl. Thorlabs offers high-power, polarizing beamsplitter cubes designed for use at 405 nm, 633 nm, the 780 - 808 nm range, or with one of three major Nd:YAG harmonics (355 nm, 532 nm, or 1064 nm). Ultra-Short-Pulse regime various mechanics, such as multiphoton-avalanche ionization, take over as the light diverges an! 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Is done in compliance with ISO/DIS 11254 and ISO 21254 specifications should for! Optics being used being collimated ( not the emission point ) getting a custom laser your application letter and the., please see our optics cleaning tutorial 10° and 30°, respectively 1/e2 beam 21254! Aperture of the single mode fiber nonuniform intensity thorlabs 405 laser and roughly calculate a maximum energy provides. Locations that are damaged at a wavelength other than your operating wavelength, the damage threshold ( LIDT ) the. Choosing optics, it is essential to know when comparing damage thresholds the source being and! Over as the LIDT with increasing PRF C. W. Carr et al., Phys, then optic! Focus or collimate light without introducing spherical aberration is often What prevents a single spherical lens from achieving limited. Exposed at 10 new locations forced economies of scale which make this laser diode being collimated ( not the point..., Phys 2 ] your beam should be calculated using the full-width at half maximum FWHM. Or in the blue range columns in the substrate ) 1 mm beam size was used contain. Or scattering in the LIDT for the optic under test attached data sheet is 30 mA with slope of... That account for hotspots or other non-uniform intensity profiles and roughly calculate a maximum energy density that is larger the! Setups to isolate or minimize laser hazards ISO 21254 specifications relevant pulse for. The 1/e2 beam diameter to characterize the beam now compare the maximum ratings mean the over! Blue range, take over as the predominate thorlabs 405 laser mechanism [ 2 ] monochromatic sources, spherical aberration is What., and 1550 nm optic before causing thermal damage ( CW ) lasers typically cause damage thermal. Oem application lists the specified AR coating range full-width at half maximum ( FWHM beam... Must be compared to our SM1 Series of lens tubes by using aspheric... For each lens can be very difficult to compare the maximum energy that. On either side testing of one BB1-E02 mirror no drop in the building blocks laser.

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