Alignment and efficiency-monitoring method of high-power fiber-to-fiber coupling

Qingqing Kong; Yiqiu Jing; Hua Shen; Shiwei Deng; Zhigang Han; Rihong Zhu

doi:doi:10.3788/COL202018.021402

Chinese Optics Letters, 2020, 18 (2): 021402, Published Online: Jan. 17, 2020

Alignment and efficiency-monitoring method of high-power fiber-to-fiber coupling Download： 657次

Qingqing Kong ¹Yiqiu Jing ¹Hua Shen ^1,2,*Shiwei Deng ¹Zhigang Han ¹Rihong Zhu ^1,2

Author Affiliations

¹ MIIT Key Laboratory of Advanced Solid Laser, Nanjing University of Science and Technology, Nanjing 210094, China

² School of Electronic Engineering and Optoelectronic Technology, Nanjing University of Science and Technology, Nanjing 210094, China

Figures & Tables

Fig. 1. Position of the coupling spot on the end cap-fiber interface.

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Fig. 2. Light incident on the fiber end face (half cross section).

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Fig. 3. Relationship between the normalized backscattering power and the offset of the spot center in the (a) outer cladding, (b) inner cladding, and (c) core.

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Fig. 4. Relationship between the normalized backscattering power and (a) $L_{0}$ , (b) $L_{1}$ , (c) $σ$ , and (d) $d_{spot}$ .

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Fig. 5. Measurement result of the etched-cladding roughness.

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Fig. 6. Schematic of the experimental setup.

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Fig. 7. Comparison of the test results and simulation results of the verification experiment.

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Fig. 8. Schematic of the FFOS.

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Fig. 9. Homemade FFOS: (a) model structure, (b) physical structure.

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Fig. 10. Test results of the FFOS: (a) power and efficiency, (b) long-time stability.

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Qingqing Kong, Yiqiu Jing, Hua Shen, Shiwei Deng, Zhigang Han, Rihong Zhu. Alignment and efficiency-monitoring method of high-power fiber-to-fiber coupling[J]. Chinese Optics Letters, 2020, 18(2): 021402.

Alignment and efficiency-monitoring method of high-power fiber-to-fiber coupling Download： 657次

Fig. 1. Position of the coupling spot on the end cap-fiber interface.

Fig. 2. Light incident on the fiber end face (half cross section).

Fig. 3. Relationship between the normalized backscattering power and the offset of the spot center in the (a) outer cladding, (b) inner cladding, and (c) core.

Fig. 4. Relationship between the normalized backscattering power and (a) $L_{0}$ , (b) $L_{1}$ , (c) $σ$ , and (d) $d_{spot}$ .

Fig. 5. Measurement result of the etched-cladding roughness.

Fig. 6. Schematic of the experimental setup.

Fig. 7. Comparison of the test results and simulation results of the verification experiment.

Fig. 8. Schematic of the FFOS.

Fig. 9. Homemade FFOS: (a) model structure, (b) physical structure.

Fig. 10. Test results of the FFOS: (a) power and efficiency, (b) long-time stability.

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Alignment and efficiency-monitoring method of high-power fiber-to-fiber coupling Download： 657次

Fig. 1. Position of the coupling spot on the end cap-fiber interface.

Fig. 2. Light incident on the fiber end face (half cross section).

Fig. 3. Relationship between the normalized backscattering power and the offset of the spot center in the (a) outer cladding, (b) inner cladding, and (c) core.

Fig. 4. Relationship between the normalized backscattering power and (a) L0, (b) L1, (c) σ, and (d) dspot.

Fig. 5. Measurement result of the etched-cladding roughness.

Fig. 6. Schematic of the experimental setup.

Fig. 7. Comparison of the test results and simulation results of the verification experiment.

Fig. 8. Schematic of the FFOS.

Fig. 9. Homemade FFOS: (a) model structure, (b) physical structure.

Fig. 10. Test results of the FFOS: (a) power and efficiency, (b) long-time stability.

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Fig. 4. Relationship between the normalized backscattering power and (a) $L_{0}$ , (b) $L_{1}$ , (c) $σ$ , and (d) $d_{spot}$ .