| 20090080898 | Method and apparatus for reducing noise in a fiber-optic sensor - An optical detection system includes an optical transmit-receive system, an optical conduit in optical communication with the optical transmit-receive system, and an optical sensor in optical communication with the optical conduit. The optical transmit-receive system provides pulsed optical signals to the optical sensor by way of the optical conduit that have a maximum pulse width of about 100 nanoseconds and further have a maximum pulse width that is less than a maximum distance of reflection of the pulsed optical signals in the optical detection system to decrease false alarms. | 03-26-2009 |
