03332nam a2200469 4500 20260818144301.0 080598 th eng .b10379137 AIT Thesis no. TC-94-8 Rahman, Md. Mahmudur An investigation into multiple stage filters for high definition wavelength multiplexed networks Bangkok : Asian Institute of Technology, 1994 78 leaves Thesis ; no. TC-94-8 A thesis submitted in partial fulfillment of the requirement for the degree of Master of Engineering, School of Engineering and Technology Thesis (M.Eng.) - Asian Institute of Technology, 1994 Fiber 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. Telecommunication Optical fibers Sharma, A.B., Chairperson Ahmed, Kazi Mohiuddin, Examination Committee Makelainen, Kimmo, Examination Committee Finnish International Development Agency (FINNIDA), Scholarship Donor Asian Institute of Technology. Thesis ; no. TC-94-8 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B15831 .b10379137 mnait s 240716 2 951012 m a s 3 mnait mnait mnarc mnarc mnarc 20 40 Barcode : 30050003068078 CREATED : 1994-05-17 RECORD # : i10473439 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050120813711 CREATED : 1994-05-17 RECORD # : i10473440 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050160046164 CREATED : 2016-01-03 RECORD # : i12887419 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050211018881 CREATED : 2022-03-16 RECORD # : i13373602 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050211018873 CREATED : 2022-03-16 RECORD # : i13373614 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 64582 64582 0 0 0 0 MAIN MAIN mnait 2026-08-18 0 AIT Thesis no. TC-94-8 30050003068078 2026-08-18 14:43:01 1 2026-08-18 20 0 0 0 0 MAIN MAIN mnait 2026-08-18 0 AIT Thesis no. TC-94-8 30050120813711 2026-08-18 14:43:01 2 2026-08-18 20 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no. TC-94-8 30050160046164 2026-08-18 14:43:01 2026-08-18 40 0 0 0 0 MAIN MAIN mnarc 2026-08-18 50.00 0 AIT Thesis no. TC-94-8 30050211018881 2026-08-18 14:43:01 3 2026-08-18 20 0 0 0 0 MAIN MAIN mnarc 2026-08-18 50.00 0 AIT Thesis no. TC-94-8 30050211018873 2026-08-18 14:43:01 4 2026-08-18 20