View updates or contact us today! Send us your laser model . For further information on LDT, please refer to our Laser Damage Threshold technical note. Note: This calculator is valid for wavelengths between 248-1100nm, pulse durations between 1-100ns, and beam diameters between 1-25mm. The LDT calculator should not be substituted for direct LIDT testing of optics utilized in a given application where laser damage is a crucial parameter. Need Help? Tax Certificates. For a laser beam, the fluence is often highest on the beam axis and lower at positions somewhat away from that axis. Note: Results greater than 1,000,000 are rounded to infinity. “Bulk And Surface Damage Thresholds Of Crystals And Glasses At 248 nm.”, Rastogi, Vinay, et al. Semrock's Laser Damage Threshold Calculator is provided for reference / guidance purposes only. A Gaussian pulse shape is assumed. Circular Rectangular. \left( 515 \text{nm}, 30 \text{ns}, 2 \text{mm} \right) &  \approx 10 \tfrac{\text{J}}{\text{cm}^2} \times \left( \frac{515 \text{nm}}{532 \text{nm}} \right) \times \sqrt{\frac{30 \text{ns}}{20 \text{ns}}} \times \left( \frac{3 \text{mm}}{2 \text{mm}} \right)^2  \\& = 26.7 \tfrac{\text{J}}{\text{cm}^2} \end{align}. Answer: The approximate LIDT at the new use conditions can be determined by: \begin{align}\text{LIDT} \! The laser induced damage threshold (LIDT) of an optical component is dependent on wavelength, pulse duration, and beam diameter. Semrock manufactures hundreds of standard optical filters for immediate shipping: bandpass filters, The laser induced damage threshold (LIDT) of an optical component is dependent on wavelength, pulse duration, and beam diameter. Address Book, Laser Fluence. The approximate LIDT at the new use conditions will be more than 2X higher than the LIDT at the test conditions. \left( z \right) = z \left[ 1 + \left( \frac{z_R}{z} \right)^2 \right] $$, $$ \theta = \frac{\lambda}{\pi \, \omega_0} $$. Laser. The LDT calculator should not be substituted for direct LIDT testing of optics utilized in a given application where laser damage is a crucial parameter. Average power Pulse width FWHM: Repetition rate: Wavelength: Peak power: Duty cycle: p-t-p time: Pulse energy: Photons per pulse: Add . Tax Certificates. Mathematically model beam propagation of Gaussian beam using simple geometric parameters. For Custom optical filters, engineering design or system design support, please contact Measurement. If an optic’s specified LIDT is at a different wavelength, pulse duration, or diameter than that of the application, the LIDT must be re-evaluated at the application specifications. i. Flat-Top. Ophir's sensor finder allows you to easily find the sensor that best suits your application. For optical pulses, wavelength is considered and photon flux is given. Address Book, We have set your country/region to United States. Sensor Finder and Laser Fluence Calculator. Understanding and Specifying LIDT of Laser Components, Importance of Beam Diameter on Laser Damage Threshold, Why Laser Damage Testing is Critical for UV Laser Applications, The Complexities of High-Power Optical Coatings, The Art and Science of Designing Optics for Laser-Induced Damage Threshold, Niemz, M. H. “Threshold Dependence of Laser‐Induced Optical Breakdown on Pulse Duration.”, Rainer, F., et al. Edmund Optics® remains operational, including our 24-hour product & application support. Payment & Shipping Due to environmental variables such as molecular contamination, physical contamination, mounting stress, temperature, etc. We have set your country/region to United States. View updates or contact us today! Step 2. Fluence (Joules/cm^2) = laser pulse energy (J) / focal spot area (cm^2) while the peak power is. Pulsed. Calculator uses first order approximations and assumes TEM 00 mode to determine beam spot size in free space applications. Step 1. Energy and Power. You can change this selection at any time, but products in your cart, saved lists, or quote may be removed if they are unavailable in the new shipping country/region. For small changes in these specifications, the resulting scaling of LIDT can be approximated. Sensor finder instructions and notes . How to calculate handheld laser power from mW to J/cm^2 ... W/cm2) was varied to achieve various energy densities (fluence, J/cm2) for treating samples. The larger the difference between the test conditions and the use conditions, the less accurate the scaling. filters sets. LDT Laser-Damage Threshold Calculator LIDT Performance Damage Calculating-laser-damage Damage-threshold. Measurement Type . In some cases, one is interested in the peak fluence, which is the highest fluence value occurring within the laser beam profile. You can change this selection at any time, but products in your cart, saved lists, or quote may be removed if they are unavailable in the new shipping country/region. us to discuss your specific needs. \left( \lambda_1, \tau_1, ∅_1 \right) \times \left( \frac{\lambda_2}{\lambda_1} \right) \times \sqrt{\frac{\tau_2}{\tau_1}} \times \left( \frac{∅_1}{∅_2} \right)^2  $$. most optics don't ever achieve their perfect calculated LDT. If an optic’s specified LIDT is at a different wavelength, pulse duration, or diameter than that of the application, the LIDT must be re-evaluated at the application specifications. Mathematically model beam propagation of Gaussian beam using simple geometric parameters. The LDT calculator scales by laser wavelength and pulse duration based on the nominal specification, it should be noted that while the equations scale fairly linearly in the nanosecond range, the damage mechanism changes from primarily thermal to electron field breakdown when switching to the picosecond scale for pulse duration. Add a stock number to begin our two-step quote process. CW. Enter Laser Parameters . In radiometry, radiant exposure or fluence is the radiant energy received by a surface per unit area, or equivalently the irradiance of a surface, integrated over time of irradiation, and spectral exposure is the radiant exposure per unit frequency or wavelength, depending on whether the spectrum is taken as a function of frequency or of wavelength. i. Beam. “Nanosecond-to-Femtosecond Laser-Induced Breakdown in Dielectrics.”. “Bulk and Surface Laser Damage of Silica by Picosecond and Nanosecond Pulses at 1064 Nm.”, Stuart, B. C., et al. Due to environmental variables such as molecular contamination, physical contamination, mounting stress, temperature, etc. Calculates peak power, pulse energy, period, etc, from laser or electrical pulse characteristics (repetition rate, average power, pulse width). Power Only. Finally, most optics will have specific regions with low laser damage thresholds due to material absorption, these include OH lines and lower UV wavelength ranges. Gaussian. “Laser Induced Damage Studies in Borosilicate Glass Using Nanosecond and Sub Nanosecond Pulses.”, Smith, Arlee V., and Binh T. Do. How can that help me to get a smaller spot? Description. This will help ensure a high energy deposition in a small volume for rapid and complete ablation. Contact : Catalogs : Company : Discount Programs, Copyright year, Edmund Optics Inc., 101 East Gloucester Pike, Barrington, NJ 08007-1380 USA, California Consumer Privacy Act (CCPA): Do Not Sell My Information. Laser fluences examined during the experimental process are relatively high, between 9 and 14J/cm2 for Mo and 12 and 20J/cm2 for Al. Payment & Shipping Contact : Catalogs : Company : Discount Programs, Copyright year, Edmund Optics Inc., 101 East Gloucester Pike, Barrington, NJ 08007-1380 USA, California Consumer Privacy Act (CCPA): Do Not Sell My Information, $$ \text{LIDT} \! Calculator uses first order approximations and assumes TEM00 mode to determine beam spot size in free space applications. \left( z \right) = \omega_0 \sqrt{1 + \left( \frac{z}{z_R} \right) ^2} $$, $$ R \! Since the equation used is only valid for small shifts in use parameters, this calculator is only intended to be used for shifts in use conditions within these limits: Note: Temporal scaling of pulse duration following (τ2/τ1)0.5 is a commonly accepted convention and experimental observations of this relationship range from (τ2/τ1)0.3 to (τ2/τ1)0.6, depending on what exactly was measured.1. \left( \lambda_2, \tau_2, ∅_2 \right) \approx \text{LIDT} \! Please note that results will vary based on beam quality and application conditions. For continuous-wave beams, the term fluence is meaningful only in combination with some irradiation time. Question: What is the approximate LIDT of an optic at a wavelength of 515nm, pulse duration of 30ns, and beam diameter of 2mm if the optic has a specified LIDT of 10 J/cm2 at a wavelength of 532nm, pulse duration of 20ns, and beam diameter of 3mm? Edmund Optics® remains operational, including our 24-hour product & application support. most optics don't ever achieve their perfect calculated LDT. LDT specifications can be found on each product webpage under the Optical Damage Rating header of the Specifications tab. Peak power (W) = pulse energy (J) / pulse duration (sec) There are several key parameters to consider for laser ablation. $$ z_R = \frac{\pi \omega_0 ^2}{\lambda} $$, $$ \omega \! The first is selection of a wavelength with a minimum absorption depth. Please note that results will vary based on beam quality and application conditions. Add a stock number to begin our two-step quote process. dichroic beamsplitters, edge and notch filters, Raman spectroscopy filters, mirrors and fluorescence I thought beam expanders increased a laser beam's size. This calculator takes a given LIDT value for a pulsed laser at a known wavelength (λ1), pulse duration (τ1), and beam diameter (∅1), and scales it to a new LIDT at a different wavelength (λ2), pulse duration (τ2), and beam diameter (∅2).

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