OPTICAL FILTERS FOR COMMUNICATIONS APPLICATIONS
●For telecom applications, thin-film filters may be incorporated into fiber-optic devices in several ways. One common packaging concept is to use "three-port couplers." Using this approach, light from the input port fiber is collimated by the first lens and directed onto the thin-film filter. Light reflected by the filter travels back into the lens and is focused into an output fiber, while light that passes the filter is collected by a second lens and is focused into another output fiber. A multiple-wavelength multiplexer/demultiplexer can be constructed by connecting a series of three-port couplers in cascade. Another packaging approach to yield a smaller package size is to use compact CWDM (CCWDM) modules. CCWDMs use free-space technology rather than a cascading method. Collimators and filters are bonded on a common substrate, using an appropriate epoxy and curing process. Rigorous control of manufacturing processes is demanded to manufacture CCWDM modules.
●Coherent leverages the proprietary thin-film deposition process to produce the industry’s best telecom filter solutions, with state-of-the-art layer thickness control.
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OPTICAL FILTERS 、 CWDM Filter 、 DWDM Filter 、 CWDM4 Filter 、 LAN-WDM Filter 、 Coarse Wavelength Division Multiplexing Filters 、 Dense Wavelength Division Multiplexing Filters 、 FILTER SUBASSEMBLIES 、 datacom filters |
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[ COMMUNICATIONS APPLICATIONS ][ DATACOM ][ Telecom ] |
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Datasheet |
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Please see the document for details |
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CFP4;QSFP28 |
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English Chinese Chinese and English Japanese |
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2022/11/10 |
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928 KB |
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