Bandpass filter and method for increasing the sensitivity on...

Details Bandpass filter and method for increasing the sensitivity on... Bandpass filter and method for increasing the sensitivity on...

2008-03-25

2008-03-25

Font, Frank G. (Department: 2883)

Optical waveguides

With optical coupler

Particular coupling function

C385S015000, C385S031000, C385S147000

Reexamination Certificate

active

07349595

ABSTRACT:
A bandpass filter, and associated method, are provided for an optical data signal, wherein the transmission curve of the bandpass filter has a passband at a mid-frequency for a particular bandwidth. The transmission curve has an attenuation range which covers the mid-frequency. This makes it possible to effectively increase the sensitivity of optical reception, particularly at a high data rate. When use is made of a number of bandpass filters having passbands which are arranged next to one another spectrally, such arrangement is highly suitable for a WDM signal.

REFERENCES:
patent: 6904214 (2005-06-01), Farroni et al.
patent: 696 05 116 (1999-11-01), None
patent: 0 909 403 (1999-04-01), None
Tietze, Halbleiter-Schaltungstechnik, 6 Auflage, 1983, Springer-Verlag, Berlin pp. 412-417.
Rienecker, Elektrische Filtertechnik Oldenburg Verlag, Muenchen, Wien 1981, p. 87-89.
Vahldiek, active RC-filter, R. Oldenburg, Muenchen, Wien 1972, p. 45-53.

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