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In this paper, we have proposed, analyzed, and verified theperformance of an optimized plasmonic 10-dB directional coupler and a 3-dB directional coupler in 2-D plasmonic waveguides using finite-difference-time-domain (FDTD) method. A plasmonic 10-dB directional coupler and a 3-dB directional coupler are based on the metal-insulator-metal (MIM) slab waveguide and analyzed at the telecommunication wavelength (λ) of 1550 nm. Here, coupling and transmission characteristics are analyzed with the optimized separation distance between the two parallel waveguides. The developed approach ensures the minimization of the crosstalk and overall directional coupler length via simultaneous adjustment of the separation distance between the parallel waveguide and length of the linear waveguide. Then an optimized structure is acquired by trading off between coupling length and separation distance. The proposed 10-dB directional coupler and 3-dB directional coupler features good energy confinement, ultra-compact and low propagation loss, which has potential applications in photonic integrated devices, optical signal processors, and other all-optical switching devices.

Liquefied petroleum fuel (LPG) is the most vital phase of every day human life, however the protection of human existence is required for the gasoline explosion. This methodology is used to shield human life. In this, the MQ2 sensor is used to realize fuel leaks in the home. If the fuel leak is detected automatically, it will ship an SMS to the user. Wifi is one of the most used networks in the world. It additionally affords the computerized reserve characteristic of LPG gasoline when the proprietor is busy and measures the non-stop weight of the LPG cylinder the use of a load cell. An AWS server is used to join the patron to the administrator and robotically replace the reservation data on the server. This work helps the business enterprise to especially point out the gasoline leak and helps each clients and the corporation to mechanically e book the fuel the use of the IOT technique.

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