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035 _a.b10379137
099 9 _aAIT Thesis no. TC-94-8
100 1 _aRahman, Md. Mahmudur
245 1 3 _aAn investigation into multiple stage filters for high definition wavelength multiplexed networks
260 _aBangkok :
_bAsian Institute of Technology,
_c1994
300 _a78 leaves
490 1 _aThesis ;
_vno. TC-94-8
500 _aA thesis submitted in partial fulfillment of the requirement for the degree of Master of Engineering, School of Engineering and Technology
502 _aThesis (M.Eng.) - Asian Institute of Technology, 1994
520 _aFiber Fabry-Perot (FFP) filter is the most widely used optical demultiplexer in wavelength division multiplexing (WDM) networks for moderately dense channels because of its low insertion loss and wide free spectral range (FSR). FSR of the Fabry Perot filter depends inversely on the cavity length of the filter. Alignment and tuning fixture of the small cavity FFP makes its design complex and expensive. Also a large FSR FFP introduces adjacent channel crosstalk due to its large passband. The fiber Mach Zehnder (MZ) and ring filter is very simple in design. In this thesis an approach has been made not only to improve the performance of the FFP by cascading it with Mach-Zehnder or ring type filter but also to investigate the applicability of the other cascaded filter combinations in WDM networks. It has been found that a cascaded FFP- MZ and FFP Ring filter show better performances over the single stage FFP filter in terms of FSR and finesse.
650 0 _aTelecommunication
650 0 _aOptical fibers
700 1 _aSharma, A.B.,
_eChairperson
700 1 _aAhmed, Kazi Mohiuddin,
_eExamination Committee
700 1 _aMakelainen, Kimmo,
_eExamination Committee
710 2 _aFinnish International Development Agency (FINNIDA),
_eScholarship Donor
810 2 _aAsian Institute of Technology.
_tThesis ;
_vno. TC-94-8
856 _3Full-Text
_uhttp://203.159.5.9/ait-thesis/detail.php?q=B15831
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