Request InfoEvanescent Optics Inc.Evanescent Optics Inc. offers a variable-ratio polarization-maintaining coupler at wavelengths from 0.7 to 2.04 µm. It is tunable over a 0 to 99% coupling range at pre-selected wavelengths. Its extinction ratio is <224 dB with loss of <0.1 dB. Single-mode non-polarization-maintaining versions are also available, and a computer-controlled version is in development. Standard pigtail length is 1 m, with longer lengths available.See full productRelated content from Photonics MediaPRODUCTSPhotonics Showcase January 2024 IssueCustom Fiber Optic SolutionsArmadillo SIA offers a comprehensive line of optical fibers, cables, bifurcated assemblies, patch cords, bundles, and more — all custom designed to your specifications. Assemblies can be made...Photonics Spectra February 2024 IssueFiber-Coupled LEDThe Model X3312 from LumeDEL LLC is a fiber-coupled LED that can be used for applications in spectroscopy as a replacement for halogen lamps. 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From his start in...PHOTONICS BUYERS' GUIDE CATEGORIESFourier Transform SpectrometersA fourier transform spectrometer is an instrument using a Michelson interferometer, a beamsplitter, two plane mirrors and a detector to give Fourier analysis of the detector signal to provide the...Erbium-Doped Fiber Optic FibersFiber Optic Design and Engineering ServicesLaser GlassCOMPANIESPhotonics Buyers' GuideEvanescent Optics Inc.Polarization Maintaining Couplers Evanescent Optics Inc. offers low loss (<0.1dB), high isolation (<-25dB) PM fiber-optic couplers in both fixed ratio and variable models. 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