Qiang Zhao, Shizhe Chen, Riqing Lü, Jiming Zhang, Keke Zhang, Li Zhang, Yuanqiang Ding. Design and Optimization of Optical-Path for Expendable Optical Fiber Ocean Temperature-Depth Sensor[J]. Laser & Optoelectronics Progress, 2018, 55(6): 060601
- Laser & Optoelectronics Progress
- Vol. 55, Issue 6, 060601 (2018)
Fig. 1. Optical path diagrams of FBG-LPG cascaded structure. (a) Cascade; (b) parallel; (c) splitting with 3 dB coupler; (d) with ISO
Fig. 2. Spectra of different optical path structures. (a) Direct demodulation after cascaded; (b) splitting with 3 dB coupler; (c) with ISO
Fig. 3. Optical path diagram of experiment
Fig. 4. Spectra with different effective reflectivities. (a) 95.0%; (b) 81.8%; (c) 72.5%; (d) 60.4%; (e) 48.8%; (f) 18.5%; (g) 5.0%; (h) 0.4%
Fig. 5. Spectral peaks of FBG and LPG with different reflectivities
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