TY - JOUR
T1 - Numerical and experimental investigation of long-period gratings in photonic crystalfiber for refractive index sensing of gas media
AU - Tian, Fei
AU - He, Zonghu
AU - Du, Henry
PY - 2012/2/1
Y1 - 2012/2/1
N2 - We have used the finite-difference frequency-domain (FDFD) method to simulate the core mode to cladding mode couplings in long-period gratings (LPGs) in photonic crystal fiber (PCF). Four sets of LPG-PCF have been fabricated with respective periodicities of 590, 540, 515, and 490 μm, resulting in corresponding resonance wavelengths (RWs) of 1241, 1399, 1494, and 1579 nm. We show both theoretically and experimentally that the longer the RW, the more sensitive the LPG-PCF is to the index change in Ar. We demonstrate a robust sensitivity of 517 nm per refractive index unit using the LPG-PCF at 1579 nm RW.
AB - We have used the finite-difference frequency-domain (FDFD) method to simulate the core mode to cladding mode couplings in long-period gratings (LPGs) in photonic crystal fiber (PCF). Four sets of LPG-PCF have been fabricated with respective periodicities of 590, 540, 515, and 490 μm, resulting in corresponding resonance wavelengths (RWs) of 1241, 1399, 1494, and 1579 nm. We show both theoretically and experimentally that the longer the RW, the more sensitive the LPG-PCF is to the index change in Ar. We demonstrate a robust sensitivity of 517 nm per refractive index unit using the LPG-PCF at 1579 nm RW.
UR - http://www.scopus.com/inward/record.url?scp=84856681540&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84856681540&partnerID=8YFLogxK
U2 - 10.1364/OL.37.000380
DO - 10.1364/OL.37.000380
M3 - Article
AN - SCOPUS:84856681540
SN - 0146-9592
VL - 37
SP - 380
EP - 382
JO - Optics Letters
JF - Optics Letters
IS - 3
ER -