Chong WANG, Huan DU, Jing WANG, Jing WANG, Jing-hua WANG. Using Fiber Grating Cascade Structure to Realize Fiber Delay Line[J]. Spectroscopy and Spectral Analysis, 2022, 42(7): 2241
- Spectroscopy and Spectral Analysis
- Vol. 42, Issue 7, 2241 (2022)
Fig. 1. Block diagram of system
Fig. 2. Block diagram of optical delay module
Fig. 3. Optical fiber reel
Fig. 4. Schematic diagram of fiber grating
Fig. 5. Reflectance spectrum of center wavelength 1 550, 1 551, 1 552 and 1 553 nm
Fig. 6. Six apodization function apodization diagram
(a): Blackman function; (b): Sinc function; (c): Tanh function; (d): Hamming function; (e): Gauss function; (f): Cauchy function
(a): Blackman function; (b): Sinc function; (c): Tanh function; (d): Hamming function; (e): Gauss function; (f): Cauchy function
Fig. 7. Variation of fiber loss with radius under different working wavelengths
Fig. 8. Waveform test system
Fig. 9. Waveforms of different transmission distances when the output frequency is 2 000 Hz
Fig. 10. Block diagram of the test system
Fig. 11. The power difference relative to the straight optical fiber when the output frequency is 2 000 Hz
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Table 1. Comparison of different apodization functions
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