Santec USA Corp.Santec Corp. has developed a miniature in-line optical filter module, the OFM-10, that is suited for erbium-doped fiber amplifiers' ASE noise reduction and other WDM transmission system applications. Users can select a fixed wavelength in the 1310- to 1550-nm range with a wavelength accuracy of ±0.1 nm. A double cascading filter also is available for narrower bandwidths. 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