| Autor: |
Overbeck, Jay A., Salisbury, Michael S., Mark, Martin B., Watson, Edward A. |
| Zdroj: |
Applied Optics; November 1995, Vol. 34 Issue: 33 p7724-7730, 7p |
| Abstrakt: |
The transmitted energy required for an airborne laser radar system to be able to image a target at 20 km is investigated. Because direct detection is being considered, two methods of enhancing the received signal are discussed: (1) using an avalanche photodiode (APD) as the detector and (2) using a commercial fiber amplifier as a preamplifier before a photodetector. For this analysis a specified signal-to-noise ratio was used in conjunction with the radar range equation, which includes the effects of atmospheric transmission and turbulence. Theoretical analysis reveals that a system with a fiber amplifier performs nearly the same as a system incorporating an APD. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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