T-1850-800s-15.8x10-94

High Efficiency Transmission Grating T-1850-800s Series T-1850-800s series lithographically patterned diffraction transmission grating is designed to be used in demanding industrial applications. It is characterized by high efficiency, excellent long-term stability, and high power handling. Gratings produced by LightSmyth undergo extensive quality assurance, have proven reliability track record and are competitively priced. 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. 100 100 90 95 80 90 70 85 60 S Pol S Pol 80 50 0.75 0.8 0.85 35 45 55 65 Wavelength (m) AOI (deg) Typical absolute diffraction efficiency at AOI 47.8 * Diffraction efficiency at 800 nm as a function of AOI * Extended operational range: The grating may operate over broader wavelength range provided that suitable anti- reflective 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. 100 80 70 80 60 60 50 40 40 20 S 30 P S Pol 0 20 0.65 0.85 1.05 600 700 800 900 1000 Wavelength (m) Wavelength (nm) Typical absolute diffraction efficiency at AOI 47.8 * Optimal input angle for each wavelength (Littrow condition) * simulated performance shown (for guidance only) Di raction E ciency (%) Di raction E ciency (%) Littrow Angle (degrees) Di raction E ciency (%)Input Beam High Efficiency Transmission Grating T-1850-800s Series Optical Description Value Units Line Density 1851.85 Lines/mm Line Density Uniformity 0.001 Lines/mm 1 Angle of Incidence (AOI) 47.8 1 Wavelength Range 80020 nm 2 Optimal polarization S 3, Diffraction Efficiency >94 % 1 Notes: 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. Mechanical Dimension tolerances 0.2 for grating size and width Substrate Thickness 0.95 0.050 mm Material Fused silica, dielectric layers, no polymers 4 Scratch/Dig 60/40 standard, 40/20 and 20/10 custom 4 Note: As per MIL-PRF-1380B in the clear aperture no requirements outside of the clear aperture. Substrate dimension options 5 5 6 Part Number Substrate width, mm Substrate height, mm Clear aperture width, mm Clear aperture height, 6 mm T-1850-800s-3210-94 31.8 10.0 30.8 9.0 T-1850-800s-3220-94 31.8 20.2 30.8 19.2 T-850-800s-13020-94 130.0 20.2 125.0 20.2 Custom dimensions Any rectangle fitting within 135 mm diameter circle (e.g. 130 x 20 mm) 5 Notes: Width is perpendicular to grating grooves, height is along the grating grooves. 6 Clear aperture is centered on the substrate. Transmission Typical Optical Layout Grating The transmission grating is designed to operate in Littrow configuration, where the angle of incidence and diffraction are the same for the central operational wavelength. Light is dispersed in the plane perpendicular to the grooves. Incidence Angle Diraction Angle LightSmyth Technologies www.LightSmyth.com Tel + 1-541-431-0026 2017 LightSmyth Technologies. All rights reserved. LightSmyth is a pending trademark of Finisar Corporation. Features and specifications are subject to change without notice. 01/17 Diracted Beam