The maximum ratings mean the limitation over which the laser should not be operated even instant time. These 1/2 (12.7 mm) and 1 (25.4 mm) cubes have a dielectric V-coating on four faces that minimizes re www.thorlabs.com Specifications subject to change without notice. If the optic was tested at a wavelength other than your operating wavelength, the damage threshold must be scaled appropriately. The table to the right defines each letter and lists the specified AR coating range. This lens also has a clear aperture that is larger than the collimated beam diameter. The damage threshold for these lenses is determined by the antireflective (AR) coating. The pulse length must now be compensated for. 91, 127402 (2003). 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 - 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]. 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. Important Notes: 1. Aspheric Lens in a Fiber Launch Application. The mounted aspheres are readily adapted to our SM1 series of lens tubes by using our Aspheric Lens Adapters. The LDM Series modules come in six wavelength versions: 405, 635, 670, 785, 850, and 1550 nm. 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. 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. These lower thresholds are due to absorption or scattering in the cement or metal coating. 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). [4] N. Bloembergen, Appl. The number of locations that are damaged at a particular power/energy level is recorded. The LIDT for an optic greatly depends on the type of laser you are using. 12, 661 (1973). 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°). ¾|Rö×ØZOµÝÿóÕßë]ûýrÖ¹cA¬.Jû1er³Tÿ?ÞûöÝ¿§sV/§L~¶)K:e_p¤ãó#~ïïõËþ
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òðÇæïÀ½BÖ_¿ËÔÊÄärÜ_Éß~GYtB. 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 calculation above assumes a uniform beam intensity profile. For reference a Gaussian beam typically has a maximum energy density that is twice that of the 1/e2 beam. 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. The table below lists basic specifications. 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. If your maximum energy density is less than this adjusted LIDT maximum energy density, then the optic should be suitable for your application. Thorlabs specializes in the building blocks for laser and fiber optic systems. This wavelength and laser type is used more than any other in the blue range. 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). 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. 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. www.thorlabs.com Specifications subject to change without notice. First, a low-power/energy beam is directed to the optic under test. These modules offer single-spatial-mode output in com Since the output of a laser diode is highly divergent, collimating optics are necessary. These compact instruments consist of a laser head, an external +15 V power supply with … 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. [3] C. W. Carr et al., Phys. Its use in high volume consumer product applications forced economies of scale which make this laser diode wavelength affordable and simple to procure. The graph to the right shows why expressing the LIDT as an energy density provides the best metric for short pulse sources. For more information on cleaning optics, please see our Optics Cleaning tutorial. 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. 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. 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. The specifications to the right are measured data for Thorlabs' AR-coated molded glass aspheric lenses. The specifications for the L780P010 laser diode indicate that the typical parallel and perpendicular FWHM beam divergences are 10° and 30°, respectively. 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. Diodes are arranged by wavelength and then power. 2. This process is repeated until damage is observed. 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. 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 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. Thorlabs specializes in the building blocks for laser and fiber optic systems. When choosing a collimation lens, it is essential to know the divergence angle of the source being used and the desired output diameter. Thorlabs offers a large selection of mounted and unmounted aspheric lenses to choose from. While the test results are only representative of one coating run, Thorlabs specifies damage threshold values that account for coating variances. Thorlabs' LIDT testing is done in compliance with ISO/DIS 11254 and ISO 21254 specifications. Remember, for optimum coupling the spot size of the focused beam must be less than the MFD of the single mode fiber. 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. 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. Clicking on the X takes you to the landing page where that lens (mounted or unmounted) can be purchased. After exposure, the optic is examined by a microscope (~100X magnification) for any visible damage. 2. 405nm Blue Laser Diode Definition : The most common blue laser is a 405nm semiconductor diode laser. 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 damage analysis will be carried out on a similar optic (customer's optic will not be damaged). When choosing optics, it is important to understand the Laser Induced Damage Threshold (LIDT) of the optics being used. This graph was obtained from [1]. With this information known, it is now time to choose the appropriate collimating lens. A simple example will illustrate the key specifications to consider when trying to choose the correct lens. Next, the power/energy is either increased or decreased and the optic is exposed at 10 new locations. Thorlabs specializes in the building blocks for laser and fiber optic systems. There are multiple regimes in which a pulsed laser can damage an optic and this is based on the laser's pulse length. 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. 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. 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). This working distance is measured from the lens to the window of the laser diode being collimated (not the emission point). Contact Tech Support for more information. A histogram such as that below represents the testing of one BB1-E02 mirror. The energy density of your beam should be calculated in terms of J/cm2. Used to contain optical setups to protect the wearer from unintentional laser reflections effects ( absorption either in cement... 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