DocumentCode :
1433185
Title :
Successive Asymmetric Abrupt Tapers for Tunable Narrowband Fiber Comb Filters
Author :
Feng, Zhi-Zheng ; Hsieh, Yu-Hsin ; Chen, Nan-Kuang
Author_Institution :
Dept. of Electro-Opt. Eng., Nat. United Univ., Miaoli, Taiwan
Volume :
23
Issue :
7
fYear :
2011
fDate :
4/1/2011 12:00:00 AM
Firstpage :
438
Lastpage :
440
Abstract :
We experimentally demonstrate wavelength tunable narrowband comb filters with the extinction ratio of 31.8 dB by cascading several abrupt fiber tapers in series in a standard single-mode fiber (SMF) and a highly Er/Yb-codoped fiber (EYDF), respectively. The fiber is slightly inclined and immersed in a micro-flame where the bilateral edges of flame can provide a higher heating temperature than the center of the flame to achieve two asymmetric abrupt tapers. Adjacent to the last two abrupt tapers, this procedure is repeated several times to make successive abrupt tapers. The individual abrupt taper in the grouped asymmetric abrupt tapers has different waist diameters from each other. The grouped abrupt tapers are then immersed in optical liquids for tunable narrowband comb filters.
Keywords :
comb filters; erbium; optical fibre fabrication; optical fibre filters; ytterbium; EYDF; JkJk:Er,Yb; micro flame; optical liquid; standard single mode fiber; successive asymmetric abrupt taper; tunable narrowband fiber comb filters; wavelength tunable narrowband comb filters; Abrupt taper; comb filter; core-cladding mode interference; wavelength tuning;
fLanguage :
English
Journal_Title :
Photonics Technology Letters, IEEE
Publisher :
ieee
ISSN :
1041-1135
Type :
jour
DOI :
10.1109/LPT.2011.2107573
Filename :
5699344
Link To Document :
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