Pigtailed Laser Diode, SMF from Thorlabs. A simple example will illustrate the key specifications to consider when choosing the correct lens for a given application. The damage threshold for these lenses is determined by the antireflective (AR) coating. 3. 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. Diodes are arranged by wavelength and then power. Threshold Current referenced on the attached data sheet is 30 mA with slope efficiency of 0.25. Thorlabs specializes in the building blocks for laser and fiber optic systems. 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. These lower thresholds are due to absorption or scattering in the cement or metal coating. The specifications for the L780P010 laser diode indicate that the typical parallel and perpendicular FWHM beam divergences are 10° and 30°, respectively. ... Popular λ: View Only 405 nm Laser Diodes; Popular λ: View Only 488 nm Laser Diodes; 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.). 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). When choosing a collimation lens, it is essential to know the divergence angle of the source being used and the desired output diameter. Safe Practices and Light Safety Accessories. This process is repeated until damage is observed. This wavelength and laser type is used more than any other in the blue range. Beam diameter is also important to know when comparing damage thresholds. The maximum ratings mean the limitation over which the laser should not be operated even instant time. Example:Fiber: P1-630A-FC-2Collimated Beam Diameter Prior to Lens: Ø3 mm. Continuous wave (CW) lasers typically cause damage from thermal effects (absorption either in the coating or in the substrate). 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. 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°). 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. 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 with pulse lengths longer than 1 µs can be treated as CW lasers for LIDT discussions. Please visit the landing page for more details. Each unit is tested before shipment; ... Wavelength 395 nm 405 nm 415 nm Threshold Current* - 20 mA 30 mA Slope Efficiency* 0.2 0.25 - 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. For data presented here, a <1 mm beam size was used to measure the LIDT. If the optic was tested at a wavelength other than your operating wavelength, the damage threshold must be scaled appropriately [3]. 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. The table to the right defines each letter and lists the specified AR coating range. The Item # listed is that of the unmounted, uncoated lens. Pulses shorter than 10-9 s cannot be compared to our specified LIDT values with much reliability. 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. 91, 127402 (2003). The longer the pulse duration, the more energy the optic can handle. Rev. As previously stated, pulsed lasers typically induce a different type of damage to the optic than CW lasers. 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. 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. You must now consider hotspots in the beam or other non-uniform intensity profiles and roughly calculate a maximum power density. This graph was obtained from [1]. 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. Average linear power density can be calculated using the equation below. Shop 10,000 + Laser Diodes, Modules & Systems. Thorlabs offers compact laser modules equipped with a USB connector, phono jack, or bare wire leads. Contact Tech Support for more information. Opt. 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). Do not clean the fiber connector when the diode is in operation. LIDT in linear power density vs. pulse length and spot size. Remember, for optimum coupling the spot size of the focused beam must be less than the MFD of the single mode fiber. [3] C. W. Carr et al., Phys. 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. 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. The damage analysis will be carried out on a similar optic (customer's optic will not be damaged). Next, the power/energy is either increased or decreased and the optic is exposed at 10 new locations. The mounted working distance is measured from the edge of the unthreaded portion of the housing. 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. Click on the red Document icon next to the item numbers below to access the Zemax file download. 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. The graph to the right shows why expressing the LIDT as an energy density provides the best metric for short pulse sources. While the test results are only representative of one coating run, Thorlabs specifies damage threshold values that account for coating variances. The LIDT for an optic greatly depends on the type of laser you are using. The molding process will cause the properties of the glass (e.g., Abbe number) to deviate slightly from those given by glass manufacturers. You must now adjust this energy density to account for hotspots or other nonuniform intensity profiles and roughly calculate a maximum energy density. 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. 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. If the optic was tested at a wavelength other than your operating wavelength, the damage threshold must be scaled appropriately. 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. 2. Firmly tighten the clamps using the locking screws. Molded glass aspheres are manufactured from a variety of optical glasses to yield the indicated performance. 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. www.thorlabs.com Specifications subject to change without notice. These modules offer single-spatial-mode output in com Keep in mind that this calculation is only used for pulses between 10-9 s and 10-7 s. For pulses between 10-7 s and 10-4 s, the CW LIDT must also be checked before deeming the optic appropriate for your application. 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). 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. Clicking on the X takes you to the landing page where that lens (mounted or unmounted) can be purchased. When choosing optics, it is important to understand the Laser Induced Damage Threshold (LIDT) of the optics being used. These compact instruments consist of a laser head, an external +15 V power supply with … 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. A good rule of thumb is to pick a lens with an NA twice that of the laser diode NA. These lenses each have a focal length of 4.6 mm, resulting in an approximate major beam diameter of 2.5 mm. 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. There are multiple regimes in which a pulsed laser can damage an optic and this is based on the laser's pulse length. A histogram such as that below represents the testing of one BB1-E02 mirror. Pulsed lasers with high pulse repetition frequencies (PRF) may behave similarly to CW beams. 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. I have reached out to you directly to discuss the possibility of getting a custom laser. Unfortunately, it can be very difficult to compare the LIDT specification of an optic to your laser. 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. The table below lists basic specifications. This calculation assumes a uniform beam intensity profile. 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. 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. Specific material properties for each lens can be found by clicking on the Info Icon  in the tables below and selecting the Glass tab. www.thorlabs.com Specifications subject to change without notice. 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. [4] N. Bloembergen, Appl. The pulse length must now be compensated for. [1] R. M. Wood, Optics and Laser Tech. 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. 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. More details for TC12FC-405 can be seen below. Links to the files can be found by clicking on the item number in the price tables below. 29, 517 (1998). Aspheric lenses are commonly chosen to couple incident light with a diameter of 1 - 5 mm into a single mode fiber. 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. Up to this point, we have been using the full-width at half maximum (FWHM) beam diameter to characterize the beam. 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 laser should be of f when plugging or un -plugging the connector. Product Specifications Thorlabs specializes in the building blocks for laser and fiber optic systems. 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). If your maximum energy density is less than this adjusted LIDT maximum energy density, then the optic should be suitable for your application. 405 nm ± 5 nm Thorlabs' Polarizing Bandpass Filters are designed to isolate key laser lines while also separating out the s- and p-polarization states. For reference a Gaussian beam typically has a maximum energy density that is twice that of the 1/e2 beam. 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). 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. 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. The specifications to the right are measured data for Thorlabs' AR-coated molded glass aspheric lenses. The damage threshold is then assigned to be the highest power/energy that the optic can withstand without causing damage. 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 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). With this information known, it is now time to choose the appropriate collimating lens. For our selection of IR molded aspheres, click here. Therefore, as the light diverges, an elliptical beam will result. [2] Roger M. Wood, Laser-Induced Damage of Optical Materials (Institute of Physics Publishing, Philadelphia, PA, 2003). EFL is specified at 405 nm rather than at the design 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. This working distance is measured from the lens to the window of the laser diode being collimated (not the emission point). ; Laser goggles designed for specific wavelengths should be clearly available near laser setups to protect the wearer from unintentional laser reflections. Pulsed lasers, on the other hand, often strip electrons from the lattice structure of an optic before causing thermal damage. If your power density is less than the adjusted LIDT of the optic, then the optic should work for your application. For monochromatic sources, spherical aberration is often what prevents a single spherical lens from achieving diffraction limited performance when focusing or collimating light. A simple example will illustrate the key specifications to consider when trying to choose the correct lens. 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). 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. Thorlabs' Laser Diode Modules are available in either collimated or adjustable-focus varieties ... CPS405 Collimated Laser Diode Module, 405 nm, 4.5 mW, Elliptical Beam, Ø11 mm Housing $185.00 Today CPS450 Collimated Laser Diode Module, 450 nm, 4.5 mW, … 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. For this application, the ideal lens is a molded glass aspheric lens with focal length near 5.6 mm and our -B antireflection coating, which covers 780 nm. 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. The collimated output has a Ø3 mm round beam profile at 50 mm from the housing. 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. Important Notes: 1. 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. 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. Operating current at 10 mW for this 405nm laser … 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. The clear aperture of the unmounted lens is different on either side. Thorlabs' LIDT testing is done in compliance with ISO/DIS 11254 and ISO 21254 specifications. For reference, a Gaussian beam typically has a maximum power density that is twice that of the uniform beam (see lower right). 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. The calculation above assumes a uniform beam intensity profile. The number of locations that are damaged at a particular power/energy level is recorded. 12, 661 (1973). Important Notes: 1. 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. 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. 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). Upon request, we can provide individual test information and a testing certificate. We … 2. Mark Frederick (posted 2020-09-08 20:42:37.227) What is the window thickness of the L638P200? 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). Thorlabs offers a large selection of mounted and unmounted aspheric lenses to choose from. Click to view item-specific focal length shift data and spot diagrams at various wavelengths. 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' Enclosure Systems can be used to contain optical setups to isolate or minimize laser hazards. Thorlabs specializes in the building blocks for laser and fiber optic systems. 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. 405nm Blue Laser Diode Definition : The most common blue laser is a 405nm semiconductor diode laser. This graph was obtained from [1]. Solving for the desired focal length of the collimating lens yields. 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. 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. Thorlabs offers a large selection of aspheric lenses. 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. EFL is specified at 1064 nm rather than at the design wavelength. 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. Contact Tech Support for more information. Do not clean the fiber connector when the diode is in operation. Lens also thorlabs 405 laser a clear aperture of the housing choose from more information on optics. Point, we can provide individual test information and a testing certificate the Zemax download... To this point, we can provide individual test information and a testing certificate when to... 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