| 1 | These "incoherent" devices cannot be used in an interferometer. | |
| 2 | The two LIGO interferometers work together as one observatory. | |
| 3 | This paper presents the operating principle of a new lateral shearing interferometer . | |
| 4 | It was a big practical improvement in using laser interferometers to measure small distances. | |
| 5 | One possibility, according to Hogan, would be to use a device called an atom interferometer. |