Please visit the landing page for more details. 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. EFL is specified at 1064 nm rather than at the design wavelength. I have reached out to you directly to discuss the possibility of getting a custom laser. 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. 3. Low Power Violet Laser Diode - 8mm diameter 405nm 1mW Blue Laser Module has the following features: Wavelength is 405 nm, Output Power is 1 mW, Submodules, and more. Contact Tech Support for more information. 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. 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. Aspheric lenses are designed to focus or collimate light without introducing spherical aberration into the transmitted wavefront. 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. Diodes are arranged by wavelength and then power. These 1/2 (12.7 mm) and 1 (25.4 mm) cubes have a dielectric V-coating on four faces that minimizes re 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. This web page contains Thorlabs' UV laser diode with a center wavelength at 375 nm. For our selection of IR molded aspheres, click here. The LP405-SF30 from Thorlabs Inc is a Laser Diode with Wavelength 405 nm, Output Power 0.3 W, Operating Voltage 5 to 6.5 V, Operating Current 0.1 to 0.15 A, Output Power (CW) 0.3 W. More details for LP405-SF30 can be seen below. 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. 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. The Item # listed is that of the unmounted, uncoated lens. Testing may result in additional costs or lead times. Aspheric Lens in a Fiber Launch Application. Average linear power density can be calculated using the equation below. The clear aperture of the unmounted lens is different on either side. Since the output of a laser diode is highly divergent, collimating optics are necessary. Specific material properties for each lens can be found by clicking on the Info Icon  in the tables below and selecting the Glass tab. This process is repeated until damage is observed. Operating current at 10 mW for this 405nm laser … Click on the red Document icon next to the item numbers below to access the Zemax file download. 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]. The maximum ratings mean the limitation over which the laser should not be operated even instant time. Opt. 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. Continuous wave (CW) lasers typically cause damage from thermal effects (absorption either in the coating or in the substrate). When choosing optics, it is important to understand the Laser Induced Damage Threshold (LIDT) of the optics being used. The collimated output has a Ø3 mm round beam profile at 50 mm from the housing. If the optic was tested at a wavelength other than your operating wavelength, the damage threshold must be scaled appropriately. [3] C. W. Carr et al., Phys. The table below lists basic specifications. 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. 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. 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. For beams with a high PRF both the average and peak powers must be compared to the equivalent CW power. This graph was obtained from [1]. 405nm Blue Laser Diode Definition : The most common blue laser is a 405nm semiconductor diode laser. 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. www.thorlabs.com Specifications subject to change without notice. Important Notes: 1. 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). 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). Solving for the desired focal length of the collimating lens yields. 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. 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. 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. The graph to the right shows why expressing the LIDT as an energy density provides the best metric for short pulse sources. Lett. Safe Practices and Light Safety Accessories. The mounted aspheres are readily adapted to our SM1 series of lens tubes by using our Aspheric Lens Adapters. 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). 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°). The specifications for the L780P010 laser diode indicate that the typical parallel and perpendicular FWHM beam divergences are 10° and 30°, respectively. If your power density is less than the adjusted LIDT of the optic, then the optic should work for your application. Pigtailed Laser Diode, SMF from Thorlabs. 29, 517 (1998). For monochromatic sources, spherical aberration is often what prevents a single spherical lens from achieving diffraction limited performance when focusing or collimating light. These lenses each have a focal length of 4.6 mm, resulting in an approximate major beam diameter of 2.5 mm. The mounted working distance is measured from the edge of the unthreaded portion of the housing. 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. 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. 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. For data presented here, a <1 mm beam size was used to measure the LIDT. 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. These compact instruments consist of a laser head, an external +15 V power supply with … For a Gaussian beam profile, the 1/e2 diameter is almost equal to 1.7X the FWHM diameter. The laser should be of f when plugging or un -plugging the connector. 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 table below contains all molded visible and near-IR aspheric lenses offered by Thorlabs. Its use in high volume consumer product applications forced economies of scale which make this laser diode wavelength affordable and simple to procure. There are multiple regimes in which a pulsed laser can damage an optic and this is based on the laser's pulse length. Thorlabs Laser Diodes, Unbiased LASER DIODE SELECTION GUIDE, Compare all Manufacturers and Product Data Sheets on One Site, 370nm to 2350nm. 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. The longer the pulse duration, the more energy the optic can handle. Aspheric lenses are commonly chosen to couple incident light with a diameter of 1 - 5 mm into a single mode fiber. 12, 661 (1973). Contact Tech Support for more information. Figure 4 shows an example of an NPL laser head mounted on an optical table. These mounted aspheres have a metric thread that makes them easy to integrate into an optical setup or OEM application. Additionally, for highly transparent materials, there is little to no drop in the LIDT with increasing PRF. Firmly tighten the clamps using the locking screws. 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). Shop 10,000 + Laser Diodes, Modules & Systems. ; Laser goggles designed for specific wavelengths should be clearly available near laser setups to protect the wearer from unintentional laser reflections. 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. 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. These modules offer single-spatial-mode output in com The TC12FC-405 from Thorlabs Inc is a Collimator with Wavelength Range 404 to 406 nm, Focal Length 11.14 mm. Upon request, we can provide individual test information and a testing certificate. Therefore, as the light diverges, an elliptical beam will result. S405-XP - Single Mode Optical Fiber, 400 - 680 nm, Ø125 µm Cladding First, a low-power/energy beam is directed to the optic under test. 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. Pulsed lasers with pulse lengths longer than 1 µs can be treated as CW lasers for LIDT discussions. 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. [1] R. M. Wood, Optics and Laser Tech. 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. Pulsed lasers with high pulse repetition frequencies (PRF) may behave similarly to CW beams. 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. 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. Mark Frederick (posted 2020-09-08 20:42:37.227) What is the window thickness of the L638P200? When choosing a collimation lens, it is essential to know the divergence angle of the source being used and the desired output diameter. Compatible with Thorlabs' Laser Diode and TEC Controllers; ... We offer the DL5146-101S 405 nm laser diode in a 5.6 mm package. For short pulses, energy density becomes a constant with spot size. Molded glass aspheres are manufactured from a variety of optical glasses to yield the indicated performance. Thorlabs specializes in the building blocks for laser and fiber optic systems. 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). Clicking on the X takes you to the landing page where that lens (mounted or unmounted) can be purchased. 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. 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. These lower thresholds are due to absorption or scattering in the cement or metal coating. The maximum ratings mean the limitation over which the laser should not be operated even instant time. 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. 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]. 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.). The LIDT for an optic greatly depends on the type of laser you are using. More details for TC12FC-405 can be seen below. Unfortunately, it can be very difficult to compare the LIDT specification of an optic to your laser. 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. 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). EFL is specified at 405 nm rather than at the design wavelength. Low Power Violet Laser Diode - LP405-SF10 has the following features: Wavelength is 405 nm (395 nm - 415 nm), Output Power is 10 mW, FP Laser Diode, TO-can, and more. Beam diameter is also important to know when comparing damage thresholds. Product Specifications 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. For more information on cleaning optics, please see our Optics Cleaning tutorial. For long pulses to CW, linear power density becomes a constant with spot size. 2. 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. 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. 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. 2. A simple example will illustrate the key specifications to consider when choosing the correct lens for a given application. Click to view item-specific focal length shift data and spot diagrams at various wavelengths. 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. You must now adjust this energy density to account for hotspots or other nonuniform intensity profiles and roughly calculate a maximum energy density. 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. The damage threshold for these lenses is determined by the antireflective (AR) coating. This working distance is measured from the lens to the window of the laser diode being collimated (not the emission point). 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