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| | Pump@Everything2.com |
 | | In photonics-talk, a pump is a device that excites atoms in the gain medium of a laser or amplifier. |
 | | In the case of semiconductor lasers or certain gaz lasers, the pump is directly the electrical current; in most solid-state lasers, some gaz lasers and EDFAs, the pump is light, either incoherent (from a flash lamp) or coherent (from another laser). |
 | | -- Pump rod, the rod to which the bucket of a pump is fastened, and which is attached to the brake or handle; the piston rod. |
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