Optical Disk Recorder (Optical Disks) - These devices record data onto disks using optical techniques for recording and replay. These disks offer large storage capacities on a small area, the most common being the popular 5 inch compact disk (CD.)

3 popular types of optical disks are:

* CD-ROM (CD) - Like audio CDs, CD-ROMs can come with data already encoded onto them. The data is permanent and can be read any number of times, but CD-ROMs cannot be modified.
* WORM : Stands for Write-Once, Read-Many.  With a WORM disk drive, you can write data onto a WORM disk, but only once. After that, the WORM disk behaves like a CD-ROM.
* Erasable: Optical disks that can be erased and loaded with new data, just like magnetic disks. These are often referred to as "EO" (Erasable Optical) disks.

Gigabit Passive Optical Networks (GPON)

Optical Amplifiers

Optical Connectors

Optical Couplings

Optical Cross-Connect (OCC, Optical Cross Connect)

Optical Disk Recorder (Optical Disks)

Optical Management System (OMS)

Optical Modulators

Optical Network Service, ONS

Optical Receivers

Optical Transceivers

Optical Transponder

Optical Transport Network (OTN)

Optical Transmitters

Reconfigurable Optical Add-drop Multiplexer (ROADM)

SONET - (Synchronous Optical Network)