Linear FM chirp laser
US4662741A · kind A · utility
17Cited by
6References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 17, 1983 |
| Grant date | May 5, 1987 |
| Priority date | — |
| Expiry date | Mar 17, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S17/26
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A laser radar system employing a linear FM chirp laser followed by post detection pulse compression by a surface acoustic wave (SAW) device. The heart of the invention is the FM chirp modulator that provides the needed tuning range and linearity for pulse compression. This modulation is accomplished by using a high pressure CO.sub.2 laser with an intracavity electric-optic modulator of CdTe. The frequency of the laser is controlled through the voltage applied to the crystal. With the performance the system offers, absolute radar ranges can be measured to 0.22 m and velocities to 0.37m/sec.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.