1850-800S COHERENT | Alldatasheet
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HIGH-EFFICIENCY TRANSMISSION DIFFRACTION GRATING Optics PRODUCT KEY T-1850-800s Series T-1850-800s series lithographically patterned transmission diffraction grating is designed to be used in emanding industrial applications (Raman and other types of spectroscopy, OCT, pulse compression and high power beam combining). It is char- acterized by high efficiency, excellent long-term stability, and high power handling. Gratings produced by Coherent undergo extensive quality assurance, have proven reliability track record and are competitively priced. T - 1850 - 800s - 31.8x10 - 94 Transmission Grooves/mm Width x Height, mm Groove || to Height Min efficiency, % Central wavelength, nm
HIGH-EFFICIENCY TRANSMISSION DIFFRACTION GRATING © 2022 Coherent Corp. Legal notices : coherent.com/legal sales@coherent.com www.coherent.com The S-polarization optimized transmission grating has 1851.85 lines/ mm and designed to operate near 800 nm central wavelength at 47.8° angle of incidence (AOI). Extended wavelength range performance and angular sensitivity information is provided below. Extended operational range: The grating may operate over broader wavelength range provided that suitable antireflective coating and angle of incidence is used. The plot below shows simulated performance* over extended range assuming fixed input angle (design Littrow angle of 47.8°), not accounting for AR coating losses. Optimal input angle for each wavelength is shown on the right. * Simulated performance shown (for guidance only) Typical absolute diffraction efficiency at AOI 47.8°* Typical absolute diffraction efficiency at AOI 47.8° * Optimal input angle for each wavelength (Littrow condition) Diffraction efficiency at 800 nm as a function of AOI * Wavelength ( m) AOI (deg) 100 100 0.75 0.80 .853 54 55 56 5 S Pol S Pol Wavelength ( m) Wavelength (nm) Littrow Angle (degrees) 100 0.65 1.050.85 600 700 800 900 1000 S P S Pol Specifications
Description
Line Density 1851.85 Lines/mm Line Density Uniformity 0.001 Lines/mm Angle of Incidence (AOI) 1 47.8 ±1 ° Wavelength Range 800 ±20 nm Optimal polarization 2 S Diffraction Efficiency 3 >94 % Dimension tolerances ±0.2 for grating size and width Substrate Thickness 0.675 ± 0.050 mm Material Fused silica, dielectric layers, no polymers Scratch/Dig 4 60/40 standard, 40/20 and 20/10 custom Notes: 1 Optical grating performance will remain similar over larger variation in angle of incidence. 2 S-polarization: electric field vector is parallel to the grating lines. 3 Worst case in the operational wavelength range for optimal polarization. 4 As per MIL-PRF-1380B in the clear aperture; no requirements outside of the clear aperture.