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11 November 2008 How to design an easily deposited multi-band-pass filter
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Proceedings Volume 7134, Passive Components and Fiber-based Devices V; 713432 (2008) https://doi.org/10.1117/12.803710
Event: Asia-Pacific Optical Communications, 2008, Hangzhou, China
Abstract
A systemic design on multi-bandpass filters is developed based on a plurality of Fabry-Perot(FP) interferometers, which are composed of a cavity between mirrors. Certain number of passbands can be built by selecting the number of cavities, while the band-width and the band- interval can be adjusted by the total layers contained in mirrors. By changing the configuration of mirrors and cavities a huge group of multi-band-pass filter will be developed. Among many multi-bandpass filters given here several of them are tested. A double-passband filter is deposited on a super-thin substrate of thickness about 5 μm. One of its passbands situates 1550nm, three rejection bands situate 1310nm, 1490nm and 1640nm make this filter very useful for B-PON and GE-PON in the fiber communications. A triple-bandpass filter with four rejected bands is deposited on glass, its high transmittance in passbands and high isolation in rejection band make it a valuable filter for Add/Drop device. In another deposition its three passbands can transmit blue, green and red (B, G and R) lights but reject other lights which otherwise become noise to the B, G and R light signals. The good performances of the filters deposited above prove that multi-bandpass filter designed by this way is easy to do.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Sho Kamikawa "How to design an easily deposited multi-band-pass filter", Proc. SPIE 7134, Passive Components and Fiber-based Devices V, 713432 (11 November 2008); https://doi.org/10.1117/12.803710
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