Photonic sampled and quantized analog-to- digital converters on thin-film lithium niobate platform

• DOI: 10.1364/oe.474884
• Publication Date: 2022-12-30T17:00:08Z
• Authors: Donghe Tu; Xingrui Huang; Hang Yu; Yuxiang Yin; Zhiguo Yu; Zhongming Wei; Zhiyong Li
• Keywords: Analog-to-digital converter

In this paper, an on-chip photonic sampled and quantized analog-to-digital converter (ADC) on thin-film lithium niobate platform is experimentally demonstrated. Using two phase modulators as a sampler 5×5 multimode interference (MMI) coupler quantizer, 1 GHz sinusoidal analog input signal was successfully converted to digitized output with 20 GSample/s sampling rate. To evaluate the system performance, quantization curves together transfer function of ADC were measured. The experimental effective number bits (ENOB) 3.17. demonstrated device capable operating at high frequency over 67 GHz, making it promising solution for ultra-high speed conversion.