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All-optical networks have long been seen as the cornerstone of the digital economy and the main focus of network infrastructure creation in many countries due to the high transmission rate, large capacity and high reliability. For this purpose, the EU released the "EU digital decade", new set of digital targets for 2030, preparing Europe for the roll-out of the next generation of broadband infrastructure with gigabit speeds. China came up with the "14th Five-Year Plan" to fully deploy gigabit optical networks as well as speed up gigabit city construction and 200G/400G upgrade. More than 20 countries including Thailand, Egypt, Morocco, and India have announced their national fiber broadband plans.