Performance of underwater wireless optical communication (UWOC) with different vertical water channel conditions is experimentally analyzed. Experiment has been carried out by varying temperature and salinity of the vertical water channel. Underwater vertical channel is modeled by obtaining the best fit with the experimental data in terms of received optical power as a function of transmission depth and attenuation. This mathematical model is used to simulate UWOC system in Optisystem software to analyze the performance of UWOC in terms of Q factor and BER. Analysis has been carried out to obtain maximum reachable transmission depth at different data rates for fixed input power and maximum achievable data rate at different input power for fixed transmission depth. Maximum reachable transmission depth is also analyzed for different modulation index of the amplitude modulator. These analyses are carried out for optimal performance parameters such as Q factor (≥ 6) and BER (≤ 10^–9). Apart from Q factor and BER, performance of the UWOC channel is analyzed through eye diagrams obtained at the receiver of the UWOC system in terms of eye height which reflects the quality of signal. This analysis will be helpful for power budgeting, data rate restriction with transmission depth in different water channel conditions to establish vertical UWOC link.

实验分析了不同垂直水通道条件下的水下无线光通信（UWOC）的性能。通过改变垂直水道的温度和盐度进行了实验。通过根据接收光功率作为传输深度和衰减的函数获得与实验数据的最佳拟合，可以对水下垂直通道进行建模。该数学模型用于在Optisystem软件中模拟UWOC系统，以Q因子和BER分析UWOC的性能。已经进行了分析以获得对于固定输入功率在不同数据速率下的最大可达到的传输深度，以及对于固定传输深度在不同输入功率下的最大可实现的数据速率。还针对幅度调制器的不同调制指数分析了最大可到达的传输深度。进行这些分析以获得最佳性能参数，例如Q因子（≥6）和BER（≤10）^–9）。除Q因子和BER之外，还通过UWOC系统接收机处获得的眼图来分析UWOC通道的性能，该眼图反映了信号质量，即眼高。该分析将有助于在不同水道条件下建立垂直UWOC链路时进行功率预算，数据速率限制和传输深度限制。