Patent ID: 9110259
Filing Date: 2015-08-18
Classification: G01D,G01J,G02B,H04J

Abstract:
1. A wavelength discriminator having: a plurality of broadband optical sources coupled to an optical broadband source input port of a circulator, the circulator having a bidirectional sensor port coupling optical energy from the broadband optical sources to a plurality of fiber Bragg gratings (FBG) formed on an optical fiber; optical energy from said plurality of FBGs directed from said circulator sensor port to a measurement port coupled to a plurality of AWG filters; each said AWG filter accepting narrowband optical energy reflected from at least one said FBG and coupling said narrowband input optical energy to at least one AWG filter channel output, each said AWG filter operative in a fundamental range of wavelengths and also at least one alias of said fundamental range of wavelengths, each said respective channel output of each said AWG coupled to a detector; said plurality of FBGs including at least one FBG in said fundamental range and at least one said FBG in said alias range of said fundamental range; said wavelength discriminator converting said narrowband input optical energy into a wavelength estimate by examination of at least one said detector in combination with the wavelength range of a particular said broadband optical source which generated said narrowband input optical energy.