Nanosecond-level SOA drive circuit and control method
A driving circuit, nanosecond technology, applied in electric controllers, non-electric variable control, circuits, etc., can solve the problems of non-pulse duty cycle and amplitude, inaccurate output pulse, waveform distortion, etc. The effect of adjustable duty ratio and amplitude, short rise/fall time, and precise temperature control
Active Publication Date: 2020-04-24
BEIJING INST OF AEROSPACE CONTROL DEVICES
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Problems solved by technology
[0003] SOA switching speed can theoretically work within nanoseconds, but in practical applications, SOA needs to rely on the driving circuit and the method of use. Since SOA has strict requirements on temperature, current and other conditions, inaccurate control of these parameters will lead to switching The speed reduction and inaccurate output pulse directly affect the timing control accuracy of the demodulation system, and further affect the accuracy of fiber laser hydrophone array signal demodulation. Therefore, the temperature control range of the drive circuit, drive current, and switch control methods are proposed higher requirements
[0004] At present, the nanosecond-level SOA drive circuit only has theoretical model analysis, and variable current drive control cannot be realized, and no hardware drive circuit has been realized; while the application of traditional cascaded multi-channel optical switches not only increases the connection of hardware circuit parts Complexity, while multi-level will cause inconsistent signal output between different channels, which increases the cost and space required for hardware to a certain extent, and has not yet reached the switching rate of nanosecond level; there is a fast frontier nanosecond high-voltage electro-optic switch driving source It is adjusted by the resistance and capacitance of each peripheral circuit, and the duty cycle and amplitude of the pulse cannot be modified by software programming. The difficulty and accuracy of adjustment are difficult to guarantee, and it is easy to be affected by external interference, which will cause waveform distortion, which will lead to a much higher edge time of the output signal. in nanoseconds
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[0033] The present invention will be further explained and illustrated below in conjunction with the accompanying drawings and specific embodiments.
[0034] A nanosecond-level SOA driving circuit, including a temperature control circuit and an SOA configuration circuit, and a sequentially connected main control circuit, a pulse shaping circuit, a pulse driving circuit and a semiconductor optical amplifier SOA; the temperature control circuit and the SOA configuration circuit are all compatible with The SOA of the semiconductor optical amplifier is connected; the main control circuit generates pulse signals with different duty ratios, which are used to switch and control the pulse duty ratio of the output pulse signal; the pulse shaping circuit is used to convert the output pulses generated by the main control circuit The signal is shaped to generate a shaped pulse signal; the pulse driving circuit is used to amplify the shaped pulse signal generated by the pulse shaping circui...
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The invention discloses a nanosecond-level SOA drive circuit and a control method, and belongs to the technical field of fiber laser hydrophone array demodulation. The circuit comprises a temperaturecontrol circuit and an SOA configuration circuit; and a main control circuit, a pulse shaping circuit, a pulse driving circuit and an SOA, which are connected in sequence. The temperature control circuit and the SOA configuration circuit are connected with the SOA. According to a logic control relation between an output pulse signal and a feedback voltage, a method of shaping the pulse signal first and then performing closed-loop drive control output is adopted to realize variable-current drive control; the circuit and the control method have the advantages of being simple in structure, accurate in temperature control, short in optical pulse edge rising / falling time, fast in system response, adjustable in pulse duty ratio and amplitude and the like, and the nanosecond-level switching ratecan be achieved. Temperature changes are converted into voltage signal changes through closed-loop control, the constant-temperature working environment of the SOA is achieved, and it is guaranteed that the rising / falling time of the edge of the SOA optical pulse is superior to stable output of 5 ns.
Description
technical field [0001] The invention relates to a nanosecond-level SOA drive circuit and a control method, and belongs to the technical field of optical fiber laser hydrophone array demodulation. Background technique [0002] The fiber optic laser hydrophone array has the characteristics of high sensitivity, anti-electromagnetic interference, no electricity underwater, and light structure. It has important applications in the detection system of small underwater unmanned platforms, underwater anti-submarine, and underwater target tracking. Laser hydrophone array demodulation technology is a hotspot and difficulty in the research of countries all over the world, especially in military fields such as underwater target detection applications. Nanosecond semiconductor optical amplifier (SOA, semiconductor optical amplifier) driving circuit and control method are important technical guarantees for the large-scale formation of fiber laser hydrophones, and have important referenc...
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IPC IPC(8): H03K3/012H03K3/017H03K3/011H03K3/023H03K3/027G05D23/24G05B11/42H01S5/042
CPCH03K3/012H03K3/017H03K3/011H03K3/023H03K3/027G05D23/24G05B11/42H01S5/0428
Inventor赵俊鹏赵晨王学锋张海岩郑百超
OwnerBEIJING INST OF AEROSPACE CONTROL DEVICES