DISTANCE MEASURING METHOD AND DEVICE

摘要

The purpose of the present invention is to effectively eliminate spontaneously emitted light from the output of an optical amplifier and to improve signal-to-noise ratio and gain for an optical signal pulse. The present invention provides a distance measuring device comprising a light source for generating pulsed light, an optical amplifier for amplifying light generated by the light source and reflected by the object to be measured, and an optical switch which selectively transmits amplified light in the period during which pulses pass.