A LIDAR employs a Q-switched laser providing a 10-ns pulse width and the preamplifier and logconverter circuits have a passband of 10 MHz. What is the distance resolution we can achieve?
Distance resolution =cT/2
C=3*10^8 m/sec
T=10nsec
Distance resolution = (3*10^8 x 10*10^-9)/2
=1.5meters
A LIDAR employs a Q-switched laser providing a 10-ns pulse width and the preamplifier and logconverter circuits have a passband of 10 MHz. What is the distance resolution we can achieve?
What is the length of a Q-switched pulse from a 10-cm long neodymium-glass laser with a 90% reflective output mirror? Assume that the refractive index of glass is 1.5. Answers: A. 20 nanoseconds B. 1 microsecond C. 1 nanosecond D. 5 nanoseconds E. 10 nanoseconds