Author Affiliations
Laboratory of Opto-Electronic Information Science and Engineering, Department of Physics, School of Science, Beijing Jiaotong University, Beijing 100044, Chinashow less
Fig. 1. Principle of dual-wavelength narrow linewidth fiber laser
Fig. 2. Principle of the frequency selection of composite resonator
Fig. 3. Principle of three-wavelength narrow linewidth fiber laser
Fig. 4. Spectrum of dual-wavelength narrow linewidth laser
Fig. 5. Pump/laser power of one wavelength of dual-wavelength narrow linewidth fiber laser
Fig. 6. Measurement principle of output power of dual-wavelength narrow linewidth fiber laser
Fig. 7. Output power of two wavelengths
Fig. 8. Principle of the heterodyne interferometric experiments. (a) Schematic diagram of the interference experiment system; (b) actual photo of the interference experiment system
Fig. 9. Heterodyne interferometric signal when the light source is multi-longitudinal mode and single-longitudinal mode laser. (a) Multi-longitudinal mode heterodyne interference signal; (b) single longitudinal mode heterodyne interference signal
Fig. 10. Heterodyne interferometric signal of any wavelength of dual-wavelength laser
Fig. 11. Spectrum of three-wavelength narrow linewidth laser
Fig. 12. Pump/laser power of one wavelength of three-wavelength narrow linewidth fiber laser
Fig. 13. Principle of power measurement for three wavelengths
Fig. 14. Output power of three wavelengths
Fig. 15. Heterodyne interference signal of any wavelength of three-wavelength laser
Fiber grating | | 3 dB bandwidth of reflection spectrum | Reflectivity /% |
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FBG11 | 1529.85 | 0.1 | 65 | FBG12 | 1529.85 | 0.1 | 65 | FBG21 | 1542.65 | 0.1 | 65 | FBG22 | 1542.65 | 0.1 | 65 | FBG23 | 1542.65 | 0.6 | 99 |
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Table 1. Grating parameters of dual-wavelength narrow linewidth fiber laser
Fiber | Fiber length L |
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L11 | 104 | L12 | 100 | L21 | 104 | L22 | 100 |
|
Table 2. Length of L11–L22 in dual-wavelength narrow linewidth fiber laser
Fiber grating | | 3 dB bandwidth of reflection spectrum | Reflectivity /% |
---|
FBG11 | 1529.85 | 0.1 | 65 | FBG12 | 1529.85 | 0.1 | 65 | FBG21 | 1542.65 | 0.1 | 65 | FBG22 | 1542.65 | 0.1 | 65 | FBG23 | 1542.65 | 0.6 | 99 | FBG31 | 1558.00 | 0.1 | 65 | FBG32 | 1558.00 | 0.1 | 65 | FBG33 | 1558.00 | 0.6 | 99 |
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Table 3. Parameters of three-wavelength narrow linewidth fiber laser
Fiber | Fiber length |
---|
L11 | 104 | L12 | 100 | L21 | 104 | L22 | 100 | L31 | 104 | L32 | 100 |
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Table 4. Length of L11–L32 in three-wavelength narrow linewidth fiber laser