0-9 | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z
1. In optical communications, a device that converts an electrical signal into an optical signal. Note: The two most commonly used optical sources are light-emitting diodes (LEDs) and laser diodes. 2 . Test equipment that generates a stable optical signal for the purpose of making optical transmission loss measurements. [After FAA]