Cascade Connection of Two Long-Period Fiber Gratings with a <I>π</I>-Phase Shift to Expand the Rejection Bandwidths

Fatemeh ABRISHAMIAN; Katsumi MORISHITA

doi:10.1587/transele.E98.C.512

Cascade Connection of Two Long-Period Fiber Gratings with a π-Phase Shift to Expand the Rejection Bandwidths

Fatemeh ABRISHAMIAN, Katsumi MORISHITA

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Errata[Uploaded on June 8, 2015]

Summary :

A novel method was developed to expand and adjust the bandwidth of long-period fiber gratings (LPFGs) as band-rejection filters. The band-rejection filters were constructed by concatenating two LPFGs with an appropriate space, that causes a π-phase shift. The component LPFGs with the same period and the different numbers of periods are designed to have -3-dB transmission at wavelengths on both sides of a resonance wavelength symmetrically, and the transmission loss of the concatenated LPFGs peaks at the -3-dB transmission wavelengths. The rejection bandwidth was widened by changing the interval between the -3-dB transmission wavelengths. The concatenated LPFGs were simulated by using a transfer-matrix method based on a discrete coupling model, and were fabricated by a point-by-point arc discharge technique on the basis of the simulation results. It was demonstrated that the rejection bandwidth at 20-dB attenuation reached 26.6 nm and was 2.7 times broader than that of a single uniform LPFG.

Publication: IEICE TRANSACTIONS on Electronics Vol.E98-C No.6 pp.512-517

Publication Date: 2015/06/01

Publicized

Online ISSN: 1745-1353

DOI: 10.1587/transele.E98.C.512

Type of Manuscript: PAPER

Category: Optoelectronics

Authors

Fatemeh ABRISHAMIAN
Osaka Electro-Communication University
Katsumi MORISHITA
Osaka Electro-Communication University

Keyword

long-period fiber grating, band-rejection filter, widening rejection bandwidth, cascade connection, arc-discharge

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Fatemeh ABRISHAMIAN, Katsumi MORISHITA, "Cascade Connection of Two Long-Period Fiber Gratings with a $pi$-Phase Shift to Expand the Rejection Bandwidths" in IEICE TRANSACTIONS on Electronics, vol. E98-C, no. 6, pp. 512-517, June 2015, doi: 10.1587/transele.E98.C.512.
Abstract: A novel method was developed to expand and adjust the bandwidth of long-period fiber gratings (LPFGs) as band-rejection filters. The band-rejection filters were constructed by concatenating two LPFGs with an appropriate space, that causes a π-phase shift. The component LPFGs with the same period and the different numbers of periods are designed to have -3-dB transmission at wavelengths on both sides of a resonance wavelength symmetrically, and the transmission loss of the concatenated LPFGs peaks at the -3-dB transmission wavelengths. The rejection bandwidth was widened by changing the interval between the -3-dB transmission wavelengths. The concatenated LPFGs were simulated by using a transfer-matrix method based on a discrete coupling model, and were fabricated by a point-by-point arc discharge technique on the basis of the simulation results. It was demonstrated that the rejection bandwidth at 20-dB attenuation reached 26.6 nm and was 2.7 times broader than that of a single uniform LPFG.
URL: https://globals.ieice.org/en_transactions/electronics/10.1587/transele.E98.C.512/_p

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@ARTICLE{e98-c_6_512,
author={Fatemeh ABRISHAMIAN, Katsumi MORISHITA, },
journal={IEICE TRANSACTIONS on Electronics},
title={Cascade Connection of Two Long-Period Fiber Gratings with a $pi$-Phase Shift to Expand the Rejection Bandwidths},
year={2015},
volume={E98-C},
number={6},
pages={512-517},
abstract={A novel method was developed to expand and adjust the bandwidth of long-period fiber gratings (LPFGs) as band-rejection filters. The band-rejection filters were constructed by concatenating two LPFGs with an appropriate space, that causes a π-phase shift. The component LPFGs with the same period and the different numbers of periods are designed to have -3-dB transmission at wavelengths on both sides of a resonance wavelength symmetrically, and the transmission loss of the concatenated LPFGs peaks at the -3-dB transmission wavelengths. The rejection bandwidth was widened by changing the interval between the -3-dB transmission wavelengths. The concatenated LPFGs were simulated by using a transfer-matrix method based on a discrete coupling model, and were fabricated by a point-by-point arc discharge technique on the basis of the simulation results. It was demonstrated that the rejection bandwidth at 20-dB attenuation reached 26.6 nm and was 2.7 times broader than that of a single uniform LPFG.},
keywords={},
doi={10.1587/transele.E98.C.512},
ISSN={1745-1353},
month={June},}

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TY - JOUR
TI - Cascade Connection of Two Long-Period Fiber Gratings with a $pi$-Phase Shift to Expand the Rejection Bandwidths
T2 - IEICE TRANSACTIONS on Electronics
SP - 512
EP - 517
AU - Fatemeh ABRISHAMIAN
AU - Katsumi MORISHITA
PY - 2015
DO - 10.1587/transele.E98.C.512
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E98-C
IS - 6
JA - IEICE TRANSACTIONS on Electronics
Y1 - June 2015
AB - A novel method was developed to expand and adjust the bandwidth of long-period fiber gratings (LPFGs) as band-rejection filters. The band-rejection filters were constructed by concatenating two LPFGs with an appropriate space, that causes a π-phase shift. The component LPFGs with the same period and the different numbers of periods are designed to have -3-dB transmission at wavelengths on both sides of a resonance wavelength symmetrically, and the transmission loss of the concatenated LPFGs peaks at the -3-dB transmission wavelengths. The rejection bandwidth was widened by changing the interval between the -3-dB transmission wavelengths. The concatenated LPFGs were simulated by using a transfer-matrix method based on a discrete coupling model, and were fabricated by a point-by-point arc discharge technique on the basis of the simulation results. It was demonstrated that the rejection bandwidth at 20-dB attenuation reached 26.6 nm and was 2.7 times broader than that of a single uniform LPFG.
ER -