These components are called optocouplers or optoisolators or simply optos, and they perform the crucial function of passing signals between isolated sections of circuitry. Optocouplers, also known as opto-isolators, uses infrared light to transfer electrical signals between two electrically isolated circuits and are commonly classified by their photosensitive output device What is an Optocoupler? An optocoupler (also called an opto-isolator, photo-coupler, or optical. An opto-isolator (also called an optocoupler, photocoupler, or optical isolator) is an electronic component that transfers electrical signals between two isolated circuits by using light. Opto-isolators prevent high voltages from affecting the system receiving the signal. In this guide, you'll learn how they work and how you can use one in your own projects. It can be separated as OPTO + COUPLER. In terms of textual Representation: An. Opto-coupler is an electronic component that is used to conduct the electrical signals from one circuit to another circuit without directly being connected between them.