In order to maintain the security of optical network. it is urgent to research and deploy photonic firewall which can effectively process high-speed optical signals to replace existing electronic firewall which consumes high energy. After a brief review of the principle of photonic firewall. the pattern matching technology based on correlation operation and all-optical logic gates wer... https://www.ealisboa.com/mega-sale-Sol-Sunguard-Altitude-Sunscreen-1-5oz-big-savings/