Long-period fiber grating in a pure-silica-core fiber written by residual stress relaxation

2002 ◽  
Author(s):  
T. Enomoto ◽  
M. Shigehara ◽  
S. Ishikawa ◽  
T. Danzuka ◽  
H. Kanamori
Keyword(s):  
Residual Stress ◽  
Stress Relaxation ◽  
Fiber Grating ◽  
Long Period Fiber Grating ◽  
Long Period ◽  
Pure Silica ◽  
Residual Stress Relaxation ◽  
Core Fiber ◽  
Silica Core ◽  
Period Fiber Grating

Bend Vector Sensor Based on Long Period Fiber Grating Inscribed in Mismatched Twin Core Fiber

2017 ◽  
Vol 46 (10) ◽  
pp. 1006002
Author(s):  
王标 WANG Biao ◽  
庞璐 PANG Lu ◽  
张伟刚 ZHANG Wei-gang ◽  
梁小红 LIANG Xiao-hong ◽  
宁鼎 NING Ding ◽  
...  
Keyword(s):  
Fiber Grating ◽  
Long Period Fiber Grating ◽  
Long Period ◽  
Vector Sensor ◽  
Core Fiber ◽  
Period Fiber Grating

Curing Residual Strain Monitoring of Carbon Fiber Reinforced Polymer Composite Using Notched Long-Period Fiber Grating

2018 ◽  
Vol 26 (1) ◽  
pp. 27-34
Author(s):  
Ke-Ping Ma ◽  
Chao-Wei Wu ◽  
Bo-Lan Fang ◽  
Chia-Chin Chiang
Keyword(s):  
Residual Stress ◽  
Composite Materials ◽  
Residual Strain ◽  
Structural Engineering ◽  
Fiber Grating ◽  
Long Period Fiber Grating ◽  
Long Period ◽  
Strain Monitoring ◽  
Residual Strains ◽  
Period Fiber Grating

Composite materials are widely used in the aerospace industry and structural engineering owing to their advantageous mechanical properties. The curing monitoring of composite material is important to ensure the quality of the curing process, especially for the characterization of residual strains after manufacturing. In this study, we present a notched long-period fiber grating (NLPFG) with a period of 650 μm and a diameter of 66 μm that can be used in the curing monitoring of composite materials. This NLPFG was embedded into the middle layers of composite materials in order to determine the curing residual stress exhibited by the materials. The experimental results showed that the residual stress was about 107 MPa and the axial residual strain was 1490 με. Therefore, the proposed NLPFG has potential as a strain sensor for composite materials.

Twin-Core Fiber-Based Long-Period Fiber Grating and Its Coupling Characteristics

2010 ◽  
Vol 30 (12) ◽  
pp. 3391-3397
Author(s):  
王雪 Wang Xue ◽  
路密芳 Lu Mifang ◽  
杨军 Yang Jun ◽  
苑立波 Yuan Libo
Keyword(s):  
Fiber Grating ◽  
Long Period Fiber Grating ◽  
Long Period ◽  
Core Fiber ◽  
Coupling Characteristics ◽  
Period Fiber Grating
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