coupling

As nouns the difference between coupling and crosscoupling

is that coupling is act of joining together to form a couple while crosscoupling is (organic chemistry) a coupling reaction in which two different molecules react to form a third.

In physics terms the difference between coupling and outcouple

is that coupling is the property of physical systems that they are interacting with each other while outcouple is to let laser light escape from its confining cavity.

As a noun coupling

is act of joining together to form a couple.

As a verb outcouple is

to remove the coupling between two interacting beams of laser light.

As nouns the difference between coupling and photocoupling

is that coupling is act of joining together to form a couple while photocoupling is coupling activated by light.