Optical digital-to-analog conversion based on weighted fiber coupler

Zhao-Yun Li; Ya-Xian Fan; Zhi-Yong Tao; Huan Liu; Hai-Yue Pang; Yu-Kun Zhang

doi:10.1117/12.2603082

9 September 2021 Optical digital-to-analog conversion based on weighted fiber coupler

Zhao-Yun Li, Ya-Xian Fan, Zhi-Yong Tao, Huan Liu, Hai-Yue Pang, Yu-Kun Zhang

Proceedings Volume 11907, Sixteenth National Conference on Laser Technology and Optoelectronics; 1190722 (2021) https://doi.org/10.1117/12.2603082
Event: Sixteenth National Conference on Laser Technology and Optoelectronics, 2021, Shanghai, China

Abstract

The scheme of optical digital-to-analog conversion based on weighted fiber coupler is proposed. The simulation results show that when the output signal without filter, the time domain waveform is interfered by beat noise, and the function of optical digital-to-analog conversion cannot be realized. Fortunately, the beat noise is concentrated in the high frequency region which is more than 100GHz by setting the wavelength interval of the directly modulated laser array, and it can be removed effectively by the low-pass filter. However, some peak interference will appear at the time of signal alternation. When the filtering processing matching with the bandwidth of the transform signal, the peak interference can be suppressed. Finally, the optical digital-to-analog conversion with signal rate of 10Gbps and quantization accuracy of 5 bits can be realized.

Citation Download Citation

Zhao-Yun Li, Ya-Xian Fan, Zhi-Yong Tao, Huan Liu, Hai-Yue Pang, and Yu-Kun Zhang "Optical digital-to-analog conversion based on weighted fiber coupler", Proc. SPIE 11907, Sixteenth National Conference on Laser Technology and Optoelectronics, 1190722 (9 September 2021); https://doi.org/10.1117/12.2603082

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