Crosstalk analysis and filter optimization of single- and double-cavity Fabry-Perot filters

Abstract

Fabry-Perot Filters are major candidates for use as demultiplexers in wavelength division multiple access networks. In this paper we investigate the crosstalk limitations of such filters, compare their performances, and optimize the filter design to minimize the crosstalk degradation.1 Bol.h witli the al)()rt;l.orlo for informltaiou a.icl I)ecision Ssleties. ilT. C(amlridge. hi\ 02139. This

Crosstalk in Direct-Detection Optical Fiber FDMA Networks

“…The above formulas agree precisely with our previous results in [2], where we assumed a = 0 (i.e., zero-bandwidth or tone-like channels). In that case the signal energy and the crosstalk are given by 1 and 12 (M)2 respectively.…”

“…In effect then, an input impulse "sees" exactly 2 In contrast to our analysis of the FP filter model, we shall find it more convenient to express our results in terms of , instead of c. However, these two quantities are dependent variables here since, by using (37),…”

“…Note that all M channels are assumed to be bit-aligned. This results in a worst case linear crosstalk as shown in [2]. Laser phase noise and frequency chirp are ignored.…”

Optical components for WDM lightwave networks

“…An example of a mechanically tuned etalon is the Fabry-Perot filter. In [23], it was found that the maximum number of channels for a single-cavity Fabry-Perot filter is 0.65 , where is the finesse. A twopass filter was found to have a maximum of 1.4 channels, and two-cavity filters up to 0.44 channels.…”

Crosstalk in direct-detection optical fiber FDMA networks

“…where y1'i = e2i + e2 and 72i = (Eli -e2i) 2 . The filtering plus crosstalk penalty, on the other hand, depends only on the yli and equals 10 log 10…”