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Narrow-band optical channel-dropping filter

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2 Author(s)
Haus, H. ; MIT, Cambridge, MA, USA ; Lai, Y.

Waveguide couplers are combined with λ/4 shifted distributed feedback (DFB) resonators to produce narrowband channel dropping filters. The bandwidth of the filter can be made much narrower than the stopband of the grating. It is possible to remove the spurious responses of the grating filter by appropriate dispersion characteristics for the coupled waveguides. However, in some practical applications it may not be necessary to do this, if all channels can be accommodated within half the grating bandwidth of the filters

Published in:

Lightwave Technology, Journal of  (Volume:10 ,  Issue: 1 )

Date of Publication:

Jan 1992

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