Fiber optic cables are composed of one or more transparent optical fibers enclosed in protective coverings and strength members. Fiber optic cables are used to transmit "light" data.

Power distribution units (PDUs) have an electrical input and several outputs, often as electrical outlets, for powering multiple devices. 

Switch mode transformers (switching transformers) are used mainly in switching power supplies and DC-DC converters. They provide a storage element for transferring energy from input to output in discrete packets as required in switching power supplies, regulators and converters

DC power supplies accept an input power and output the desired form of DC power. Common types of DC power supplies include linear power supplies, switching power supplies, DC-DC converters, and silicon controlled rectifier (SCR) type power supplies.

Fiber optic switches route an optical signal without electro-optical and opto-electrical conversions.

Fiber optic couplers are optical devices that connect three or more fiber ends, dividing one input between two or more outputs, or combining two or more inputs into one output.

Fiber optic connectors are used to align and join two or more fibers together to provide a means for attaching to, or decoupling from, a transmitter, receiver, or other fiber optic device.

Fiber optic transceivers include both a transmitter and a receiver in the same component.

Inductors, coils, and chokes are passive components designed to resist changes in current and store energy in the form of a magnetic field. 

Current sense transformers are used to detect and measure current. There are two basic types of products: switch-mode transformers for power conversion applications, and precision-measurement transformers for instrumentation applications

Diode lasers use light-emitting diodes to produce stimulated emissions in the form of coherent light output. They are also known as laser diodes.

Electronic enclosures and instrument enclosures house electronic components and instruments. They are usually designed for handheld or desktop applications.

Specialty optical fiber is modified, usually by doping, for a specialized function. It consists of one or more transparent fibers enclosed in a protective covering.

Optical fiber identifiers are designed to non-invasively identify continuous-wave signals in fiber optic cables. They are low cost, hand-held tools that identify signals in single-mode fiber without interrupting service or damaging the fiber

Fiber optic test equipment is used to detect the signal loss/change through a fiber optic cable.