Fig. 1. Relationship between the driving voltage of FFP-TF and the filtered specific wavelength optical signals

Fig. 2. Schematic of the proposed real-time peak detection system for multi-wavelength optical signals

Fig. 3. DAC scanning voltage output circuit

Fig. 4. Post stage voltage amplification circuit

Fig. 5. Optoelectronic conversion and logarithmic amplification circuit

Fig. 6. Double low-pass filter

Fig. 7. The optical signal waveform after photoelectric conversion and filtering

Fig. 8. Multi-window peak framing and recognition

Fig. 9. Flow chart of peak recognition method

Fig. 10. Experimental optical path platform using 1 530-1 580 nm narrowband light source

Fig. 11. Waveforms generated by the 1 530-1 580 nm narrowband light source with an OSA

Fig. 12. Comparison of data measured by OSA and 5-group data measured by the designed detection system for the 1 530-1 580 nm narrowband light source

Fig. 13. Comparison of data measured by an OSA and the designed detection system under 1530-1580 nm narrowband light source with different driving current