Optics and Photonics Society of Iran

In this paper design and fabrication of narrow band-pass interference filter based on Fabry-Perot method with wide rejection zone at 1071 nm wavelength has been reported. Deposition was performed in vacuum chamber with pressure order of 10^-6 mbar and using electron gun. Optical monitoring system wass used to monitor the thickness of layers. On the other side of substrate a long-wave pass interference filter was designed and coated in order to making a part of rejection zone. Transmission spectra of coatings were measured using a dual-beam spectrophotometer. Finally a band-pass filter with 95 percent transmission peak and 22 nm in FWHM, was fabricated. Final filter after deposition passed all of required environmental tests according to related standards.