Optics and Photonics Society of Iran

High-Reflection (HR) optical filter ‎‏‌‏S|(LH)4|Air contain four pair of Al2O3 and Si thin film, as layers with low (L) and high (H) ‎reflection index respectively, was design and simulate in Macleod Software. Designed filter coated with Ion Beam Assisted ‎ِDeposition (IBAD) on glass substrate and facet of 650 nm diode laser as high-Reflective back mirrors. Spectroscopic result ‎show the ‎‏‌‏S|(LH)4|Air‏ ‏coated filter have broad and uniform stop band in 750-550 nm with 89% highest reflection. Reflection of ‎Simulated and coated filter was adapted. Qualified coated and made filter repeatability conclude from filters reflection ‎consistently. SPM analysis show the Roughness root mean square (Rrms) of surface filters are in order of 1.17nm and growth ‎model was cylindrical. Therefore made filter have appropriate surface and optical properties for diode laser rear mirrors.‎