JPS6039261U - optical pulse generator - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram of an optical pulse generator using a conventional semiconductor optical device, Fig. 2 is a diagram showing the voltage vs. current characteristics of the semiconductor optical device, and Fig. 3a shows the voltage across the semiconductor optical device. Figure 3 is a diagram showing temporal changes in the current flowing through a semiconductor element and optical output waveform; Figure 4 is a diagram showing the first embodiment of the present invention; Figure 5 is a diagram showing the present invention. A diagram showing another embodiment of
FIG. 6 is a circuit diagram of another embodiment of the present invention. E: Power supply voltage, Rg R1: Resistance, C: Capacitor, D
;Semiconductor optical device, Trl! Tr2. Tr3: transistor, PD: photodiode, PTr: phototransistor.

Claims (1)

[Scope of utility model registration request] A series circuit consisting of a semiconductor optical device that has negative resistance characteristics and emits light when energized and a coil, a capacitor connected in parallel to the series circuit, and a resistor and transistor inserted between the series circuit and a power source. An optical pulse generator comprising a series circuit and means for receiving light emitted from the optical element and controlling on/off of the transistor according to the output of the received light, and causing the optical element to emit pulsed light.