JPS6039262U - 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 optical device and optical output waveform, and Figure 4 is a diagram showing temporal changes in the optical output waveform of the present invention.
FIG. 5 is a circuit diagram of a second embodiment of the present invention, and FIG. 6 is a circuit diagram of another embodiment of the present invention. ° E: Power supply voltage, R, R,: Resistance, C: Capacitor,
D; Semiconductor optical device, T r 1? T r2 * T r
; Transistor, PD; Photodiode, PTr;
Phototransistor.

Claims (1)

[Scope of utility model registration request] A series circuit 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 inserted between the series circuit and a DC power source. , comprising a transistor connected in parallel to the capacitor, 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. Optical pulse generator.