Abstract
We developed a narrow band-pass transmission filter by connecting in series two fiber Bragg gratings (FBGs) with slightly different periods. The filter was fabricated by writing two FBGs directly onto the core of a single optical fiber. The center wavelengths of the element FBGs are 1549.71 nm and 1550.05 nm, their bandwidths are 0.36 nm and 0.42 nm, and their reflectances are 99.8% and 99.9%, respectively. The measured bandwidth (full width at half maximum, FWHM) of the fabricated band-pass filter is 0.052nm, and the maximum transmittance is -12.5 dB. In order to reduce the transmission loss, we adjusted the period difference between the two element FBGs by temperature control, and achieved a maximum transmittance of -0.3 dB although the bandwidth slightly increased up to 0.092 nm. To obtain the narrower bandwidth of the transmission peak, we fabricated a series-type FBG filter using FBGs with higher reflectance, whose measured band-pass bandwidth was as narrow as 0.033 nm.
| Original language | English |
|---|---|
| Pages (from-to) | 5776-5779 |
| Number of pages | 4 |
| Journal | Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers |
| Volume | 43 |
| Issue number | 8 B |
| DOIs | |
| Publication status | Published - 2004 Aug |
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Keywords
- Band-pass filters
- Fiber bragg grating
- Narrow bandwidth
- Temperature characteristics
- Wavelength shift
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
Cite this
Narrow band-pass transmission filter consisting of two fiber bragg gratings with different periods. / Yabe, Yusuke; Yamada, Yuto; Komatsu, Shinichi.
In: Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, Vol. 43, No. 8 B, 08.2004, p. 5776-5779.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Narrow band-pass transmission filter consisting of two fiber bragg gratings with different periods
AU - Yabe, Yusuke
AU - Yamada, Yuto
AU - Komatsu, Shinichi
PY - 2004/8
Y1 - 2004/8
N2 - We developed a narrow band-pass transmission filter by connecting in series two fiber Bragg gratings (FBGs) with slightly different periods. The filter was fabricated by writing two FBGs directly onto the core of a single optical fiber. The center wavelengths of the element FBGs are 1549.71 nm and 1550.05 nm, their bandwidths are 0.36 nm and 0.42 nm, and their reflectances are 99.8% and 99.9%, respectively. The measured bandwidth (full width at half maximum, FWHM) of the fabricated band-pass filter is 0.052nm, and the maximum transmittance is -12.5 dB. In order to reduce the transmission loss, we adjusted the period difference between the two element FBGs by temperature control, and achieved a maximum transmittance of -0.3 dB although the bandwidth slightly increased up to 0.092 nm. To obtain the narrower bandwidth of the transmission peak, we fabricated a series-type FBG filter using FBGs with higher reflectance, whose measured band-pass bandwidth was as narrow as 0.033 nm.
AB - We developed a narrow band-pass transmission filter by connecting in series two fiber Bragg gratings (FBGs) with slightly different periods. The filter was fabricated by writing two FBGs directly onto the core of a single optical fiber. The center wavelengths of the element FBGs are 1549.71 nm and 1550.05 nm, their bandwidths are 0.36 nm and 0.42 nm, and their reflectances are 99.8% and 99.9%, respectively. The measured bandwidth (full width at half maximum, FWHM) of the fabricated band-pass filter is 0.052nm, and the maximum transmittance is -12.5 dB. In order to reduce the transmission loss, we adjusted the period difference between the two element FBGs by temperature control, and achieved a maximum transmittance of -0.3 dB although the bandwidth slightly increased up to 0.092 nm. To obtain the narrower bandwidth of the transmission peak, we fabricated a series-type FBG filter using FBGs with higher reflectance, whose measured band-pass bandwidth was as narrow as 0.033 nm.
KW - Band-pass filters
KW - Fiber bragg grating
KW - Narrow bandwidth
KW - Temperature characteristics
KW - Wavelength shift
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UR - http://www.scopus.com/inward/citedby.url?scp=7544240258&partnerID=8YFLogxK
U2 - 10.1143/JJAP.43.5776
DO - 10.1143/JJAP.43.5776
M3 - Article
VL - 43
SP - 5776
EP - 5779
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
SN - 0021-4922
IS - 8 B
ER -