TY - JOUR
T1 - UV-Inscribed optical fiber gratings in Mid-IR range and their laser applications
AU - Sun, Zhongyuan
AU - Yan, Zhijun
AU - Zhou, Kaiming
AU - Sun, Qizhen
AU - Badmos, Abdulyezir Ayomipo
AU - Zhang, Lin
PY - 2015/12
Y1 - 2015/12
N2 - We have UV-inscribed fiber Bragg gratings (FBGs), long-period gratings (LPGs), and tilted fiber gratings (TFGs) into mid-IR 2μm range using three common optical fiber grating fabrication techniques (two-beam holographic, phase mask, and point-by-point). The fabricated FBGs have been evaluated for thermal and strain response. It has been revealed that the FBG devices with responses in mid-IR range are much more sensitive to temperature than that in near-IR range. To explore the unique cladding mode coupling function, we have investigated the thermal and refractive index sensitivities of LPGs and identified that the coupled cladding modes in mid-IR range are also much more sensitive to temperature and surrounding medium refractive index change. The 45° tilted fiber gratings (45°-TFGs) as polarizing devices in mid-IR have been investigated for their polarization extinction characteristics. As efficient reflection filters and in-cavity polarizers, the mid-IR FBGs and 45°-TFGs have been employed in fiber laser cavity to realize multi-wavelength 2 μm Tm-doped CW and mode locked fiber lasers, respectively.
AB - We have UV-inscribed fiber Bragg gratings (FBGs), long-period gratings (LPGs), and tilted fiber gratings (TFGs) into mid-IR 2μm range using three common optical fiber grating fabrication techniques (two-beam holographic, phase mask, and point-by-point). The fabricated FBGs have been evaluated for thermal and strain response. It has been revealed that the FBG devices with responses in mid-IR range are much more sensitive to temperature than that in near-IR range. To explore the unique cladding mode coupling function, we have investigated the thermal and refractive index sensitivities of LPGs and identified that the coupled cladding modes in mid-IR range are also much more sensitive to temperature and surrounding medium refractive index change. The 45° tilted fiber gratings (45°-TFGs) as polarizing devices in mid-IR have been investigated for their polarization extinction characteristics. As efficient reflection filters and in-cavity polarizers, the mid-IR FBGs and 45°-TFGs have been employed in fiber laser cavity to realize multi-wavelength 2 μm Tm-doped CW and mode locked fiber lasers, respectively.
KW - fiber Bragg grating
KW - long period grating
KW - mid-IR fiber lasers
KW - tilted fiber grating
UR - http://www.scopus.com/inward/record.url?scp=84975883549&partnerID=8YFLogxK
U2 - 10.11989/JEST.1674-862X.508061
DO - 10.11989/JEST.1674-862X.508061
M3 - Article
AN - SCOPUS:84975883549
SN - 1674-862X
VL - 13
SP - 328
EP - 342
JO - Journal of Electronic Science and Technology
JF - Journal of Electronic Science and Technology
IS - 4
ER -