SU1303979A1 - Optical signal generator - Google Patents

Abstract

The invention relates to optical instrument making and can be used in optical communication lines, in measurement technology for converting electrical signals into optical ones. The invention makes it possible to increase the speed of an optical signal former. When a control signal 4 is applied to the input 4, the voltage at its output rises. The control current of the semiconductor emitter 5 flows through the circuit: the output of a stable voltage source 1, a resistor 2, a temperature compensating element 3, an output of a current switch 6, a semiconductor emitter 5, a common bus. When this semiconductor emitter 5 emits an optical signal. The formation of new connections between the maleficator f and the device makes it possible to reduce the voltage drops on the capacitance of the semiconductor emitter 5 and thereby to achieve the goal of the invention. 3 il. with (L d bo About with with with with cfjuff.l

Description

The invention relates to optical instrumentation and can be used in optical lines and in measuring equipment for converting electrical signals 5 into optical ones.

The purpose of the invention is to increase the speed of the optical signal former.

In FIG. Functional-W on the optical signal driver; Figures 2 and 3 are variants of electrical circuits of a current switch and a thermocompensating element, respectively. The device contains a source of stable voltage 1, a first resistor 2, the first temperature compensating element 3, a switch 4 and a semiconductor emitter 5, the first output of which is connected to a common bus, while the output of the source 1. of a stable voltage is connected to the first output of the first temperature compensating element 3 through the first resistor 2. The device also contains a current switch 6, the second thermal compensating element. 7 and the second resistor 8, while the second output of the semiconductor emitter 5 is connected in series with the 30 second thermal compensator; i element 7 and the second resistor 8 with the output of the stable voltage source 1 and connected to the output of the current switch 6 connected by the first input with key 4, and the second with the second output of the first temperature compensating element 3.

Optical signal driver

works as follows

In the initial state, in the absence of a control signal at the input of switch 4 (FIG. 1) and under normal environmental conditions along the circuit, the output of source 1 of stable voltage — the second resistor 8 — the second thermal compensating element 7 — semiconductor radiator 5 — is common The bus flows through the bias current of the semiconductor radiator. 5, causing minor background radiation. The circuit of the output of source 1 of stable voltage - the first resistor 2 - the first thermal compensating element 3 - the first output of the current switch 6 - the key 4 - the common bus flows the control current of the semiconductor emitter 5.

O 0

0

0

five

The temperature coefficients of the resistances of the first 3 and second 7 thermo-compensating elements and the resistances of the first 2 and second 8 resistors are selected in accordance with the watt-and-current and voltage-current characteristics of the used semiconductor radiator.

When a control signal 4 is applied to the input of the switch-4, the first diode 9 of the switch 6 (figure 2) closes and the control current of the semiconductor emitter 5 flows through the output circuit of the stable voltage source 1 - the first resistor 2 - the first thermal compensator element 3 — the second output of current switch 6 — semiconductor emitter 5 — is a common bus, while semiconductor emitter 5 emits an optical signal.

The stability of the radiation at the output of the device in the range of operating temperatures with correctly selected temperature coefficients of the first 3 and second 7 thermal compensating elements depends only on the stability of the voltage at the output of the source 1 of a stable voltage.

The speed of the optical signal conditioner increases due to a significant decrease in the voltage drops across the capacitance of the semiconductor emitter 5 as the control current passes through it. The reduction of these voltage drops is achieved due to the fact that the second resistor 8 and the second thermal compensating element 7, which are connected in series between the second output of the semiconductor emitter 5 and the output of the stable voltage source 1, are connected in series to the device, it is possible to keep the bias voltage within the operating temperature range in the inflection region of the current-voltage characteristic of a semiconductor radiator 5. A decrease in the voltage drops across the capacitance of a semiconductor radiator is reaching This is also due to the fact that a current switch 6 is injected into the device, which is connected to the second output of the semiconductor emitter 5, the first input to the key 4, and the second input to the second output of the first temperature compensating element 3.

Claims (1)

Invention Formula An optical signal shaper, containing a semiconductor emitter, a key, is connected in series to a source of stable voltage, the first thermal compensating element, characterized in that, in order to improve speed, 794 The second resistor and the second thermal compensating element, the output of which is connected to the semiconductor emitter input, a current switch connected to the output of the first thermal compensating element, and the first and second outputs, respectively, to the output of the switch and the semiconductor emitter. cpus.2 Editor M.Petrova Compiled by A. Chistkov Tehred I.Poyovich Proofreader A.Obruchar Order 1307 / A7 Circulation 522 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., d. A / 5 Proizvols 1-polygraphic enterprise, Uzhgorod, Projecto st., 4