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Wavelength Tunable Faraday Isolators

Wavelength Tunable Faraday Isolators
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Wavelength Tunable Faraday Isolators - 1

Newport's 500-1030nm Faraday Isolators rotate the plane of polarized light 45° in the forward direction and an additional 45° of non-reciprocal rotation in the reverse direction while maintaining the light's linear polarization. The Faraday Isolator provides high transmission in the forward direction and strongly attenuates any light traveling in the reverse direction, effectively protecting laser diodes from the deleterious effects of back reflections. Newport's 500-1030nm Faraday Isolators can be ordered with dichroic glass polarizers to minimize the size of the device for low power applications or they can be ordered with polarizing beam splitter cube polarizers for applications where maximum transmission is required and power levels do not permit the use of dichroic glass polarizers. By aligning the output polarizer orthogonal to the backward traveling light, isolation can be maximized within the usable wavelength range of the Faraday Isolator. Benefits: • Eliminate frequency instability in single frequency laser diodes • Eliminate parasitic oscillations due to ASE in amplified laser systems • Wavelength tunability allows optimal isolation at a variety of wavelengths • Isolators centered at 650nm, 780nm, 850nm, and 980nm can be ordered with either dichroic glass polarizers or polarizing beam splitter cube polarizers • Optional A/2 plate available for all isolatorsa • Two isolators can be used in series to attain 60dB isolation which is often required Specifications : for single frequency laser diodes Medium Power Isolatorsc a The addition of a waveplate may restrict wavelength range. b Product specifications are subject to change. c RoHS compliant. d When placed between crossed polarizers having an extinction ratio of >1000:1. e At center wavelength. f When tuned for maximum isolation. g Isolators with PBS cube polarizers have CW damage threshold of 2KW/cm2.

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Wavelength Tunable Faraday Isolators 2Pages

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Wavelength Tunable Faraday Isolators
2Pages