Yuqiu Xu, Yonglan Yang, Xing Li, Xin Wang, Weiwen Zou. Chip-scale Brillouin instantaneous frequency measurement by use of one-shot frequency-to-power mapping based on lock-in amplification[J]. Chinese Optics Letters, 2021, 19(11): 113902
- Chinese Optics Letters
- Vol. 19, Issue 11, 113902 (2021)
Fig. 1. (a) Schematic of the chip-scale Brillouin IFM via a lock-in amplifier (LIA). (b) Illustration of SBS interaction between the pump lightwave and probe lightwave. (c) Probe signal setting for system characterization and unknown RF detection based on the chip-scale Brillouin IFM.
Fig. 2. Experimental setup of the chip-scale Brillouin IFM via a lock-in amplifier. DFB, distributed-feedback laser; SSBM, single sideband modulator; LIA, lock-in amplifier; AWG, arbitrary waveform generator; OSC, oscilloscope; OSA, optical spectrum analyzer.
Fig. 3. (a) Frequency-to-power mapping curve for system characterization. (b) The Brillouin gain that a Costas frequency modulated signal carries.
Fig. 4. Frequency measurement error analysis (a) without curve fitting and (b) with curve fitting.
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Table 1. Costas Frequency Measurement Errors
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