Patent ID: 8115913
Filing Date: 2012-02-14
Classification: G01M,H01S

Abstract:
1. A light pulse generator comprising: a laser diode; a voltage source that applies a bias voltage to the laser diode; a switching element that causes the laser diode to emit a light pulse by directly modulating the laser diode; and an auxiliary current circuit which is charged immediately after turn-on of the switching element and which starts to discharge after a forward current flows through the laser diode so as to provide a auxiliary current to the laser diode in the same direction as the forward current wherein the auxiliary current circuit comprises at least one capacitor that is provided in parallel with the laser diode, and wherein an inductance of a current path through the laser diode and the at least one capacitor is smaller than a series inductance of a forward current loop through the laser diode, the switching element and the voltage source.