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ILF:Compact Fixed Wavelength Optical Filter Module with 8mm Square in Cross Section - Koshin Kogaku Co. Ltd.
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Optical filters: Essential components of high-speed, high-volume optical communications systems - Orbray MAGAZINE - Orbray Co., Ltd.
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Filtered 1625nm Live Fiber Filter Device / Fwdm Filtered Patchcord 1600-1670 Nm - Fiber Optic Equipment - AliExpress
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