T-1500-930-28x18-94 Finisar

High Efficiency Transmission Grating T-1500-930 Series T-1500-930 series lithographically patterned diffraction transmission grating is designed to be used in demanding industrial applications. It is characterized by high efficiency, low polarization sensitivity and high power handling. Gratings produced by LightSmyth undergo extensive quality assurance, have proven reliability track record and competitively priced. The polarization independent transmission grating has 1500.38 lines/ mm and designed to operate near 930 nm central wavelength at 44.2 angle of incidence (AOI). Extended wavelength range performance and angular sensitivity information is provided below. 100 100 90 95 80 90 70 S 85 S pol P 60 P pol Average 80 50 0.88 0.93 0.98 35 40 45 50 55 Wavelength (m) AOI (deg) Typical absolute diffraction efficiency at AOI 44.2 * Diffraction efficiency at 930 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 (designed Littrow angle of 44.2), not accounting for AR coating losses. Optimal input angle for each wavelength is shown on the right. 70 100 80 60 60 50 40 40 S 20 P 30 Average S Pol 0 20 0.6 0.8 1 1.2 1.4 600 700 800 900 1000 1100 1200 Wavelength (m) Wavelength (nm) Typical absolute diffraction efficiency at AOI 44.2 * 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-1500-930 Series Optical Description Value Units Line Density 1500.38 Lines/mm Line Density Uniformity 0.001 Lines/mm 1 Angle of Incidence (AOI) 44.2 1 Wavelength Range 93020 nm 2 Optimal polarization Any 3, Diffraction Efficiency 94 (average polarization) % 1 Notes: Optical grating performance will remain similar over larger variation in angle of incidence. See plot below. 2 S-polarization: electric field vector is parallel to the grating lines P polarization is orthogonal to S. 3 Worst case in the operational wavelength range for average 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-1500-930-2818-94 28 18 27 17 T-1500-930-13018-94 130.0 18 125.0 17 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