Optical Module Wavelength Reference Table

Optical modules operate at specific wavelengths, typically ranging from 850 nm to 1610 nm, with standardized color codes and types for easy identification.Common Optical Module WavelengthsModule TypeW...

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Optical Module Wavelength Reference Table

Optical modules operate at specific wavelengths, typically ranging from 850 nm to 1610 nm, with standardized color codes and types for easy identification.Common Optical Module WavelengthsModule TypeWavelength (nm)Typical UsePull Tab Color (if applicable)SFP (1G)850Short-range multimode fiberOften gray or blueSFP (1G)1310Medium-range single-mode fiberGreenSFP (1G)1490GPON downstreamYellowSFP (1G)1550Long-range single-mode fiberOrangeSFP+ (10G)850Short-range multimode fiberGraySFP+ (10G)1310Medium-range single-mode fiberGreenCWDM1270–1610 (18 channels)Coarse WDM networksUnique color per wavelengthBiDi1310/1490Bidirectional single fiberColor-coded per Tx/Rx wavelengthNotes:CWDM modules use 18 distinct wavelengths between 1270 nm and 1610 nm, each with a unique pull-tab color for easy identification and troubleshooting in dense networks .BiDi modules transmit and receive on a single fiber using different wavelengths for each direction, simplifying fiber deployment .Pull-tab colors are standardized by manufacturers like LINK-PP to ensure consistent identification across optical networks .Standard Spectral Lines for Optical ReferenceFor calibration and precise optical measurements, certain spectral lines are used as wavelength references:ElementLineWavelength (nm)UseHydrogenC656.3Refractive index specificationHydrogenF486.1Optical glass characterizationHeliumd587.6Standard reference for opticsHelium-Neon LaserRed632.8Laser calibrationHelium-Neon LaserGreen543.5Laser calibrationThese lines are commonly used in optical metrology, refractive index measurements, and laser calibration .Practical ApplicationsNetwork deployment: Matching module wavelength to fiber type ensures optimal transmission distance and minimal signal loss.Troubleshooting: Color-coded pull tabs allow quick identification of module type and wavelength.Calibration: Standard spectral lines provide precise references for optical instruments and material characterization. This table and reference guide provide a comprehensive overview of optical module wavelengths, types, and standard references, useful for network engineers, optical technicians, and photonics researchers.
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