High-speed wide-range high-precision programmable power source of multi-electrode active photoelectric devices

Abstract

The invention discloses a high-speed wide-range high-precision programmable power source of multi-electrode active photoelectric devices. The high-speed wide-range high-precision programmable power source comprises a digital control unit formed by a high-speed logic device FPGA, high-speed digital-to-analogue conversion units DAC and high-speed computation voltage amplifier circuits. The output ends of the high-speed digital-to-analogue conversion units DAC are connected with the input ends of the high-speed computation voltage amplifier circuits in series to form digital-to-analogue conversion amplifier circuits, a plurality of output ends of the digital control unit are in one-to-one connection with the input ends of the digital-to-analogue conversion amplifier circuits, and the output ends of the digital-to-analogue conversion amplifier circuits are in one-to-one connection with the input ends of the active photoelectric devices. By means of the high-speed wide-range high-precision programmable power source of the multi-electrode active photoelectric devices, the defects of a common power source are overcome. The high-speed wide-range high-precision programmable power source also has the advantages of being wide in output voltage range, high in accuracy, quick in switching speed and the like and becomes an essential driving source for multi-electrode tunable laser static and dynamic testing.

Description

technical field [0001] The invention belongs to the technical field of electronics and electrics, and relates to a power supply of multi-electrode active photoelectric devices, in particular to a multi-path control active photoelectric device power supply with wide output voltage range, high accuracy and fast switching speed. Background technique [0002] With the rapid development of high-speed all-optical networks, tunable semiconductor lasers, as the key optoelectronic devices of the new generation of WDM systems and all-optical networks, have been given higher performance requirements. Sampling grating distributed Bragg reflective (SG-DBR) laser, as a new type of wide tunable semiconductor laser, has the advantages of wide wavelength tuning range, fast tuning speed, low cost, high output power, good stability, and easy integration with other devices. Advantages, it has broad application prospects in WDM systems. [0003] please see figure 1 , taking a four-section SG-D...

AI Technical Summary

Problems solved by technology

In the wavelength calibration process of the SG-DBR laser, it is necessary to scan the corresponding driving voltage (or current) of the front and rear grating sections and phase sections, and determine the driving voltage of each section corresponding to each communication wavelength specified by ITU-T. Voltage (or current) value; see figure 2 , is the relationship between the lasing wavelength of a SG-DBR laser and the control current of two sampling grating sections. During the entire current scanning process, the scanning accuracy is required to reach 0.1mA. If the scanning accuracy is not enough, the calibration result will be inaccurate; in addition , in the dynamic test process of SG-DBR laser, the speed of each tuning section current switching and the synchronization accuracy of each switching are also very high (ns level); in addition, the adjustment range of each section current must also be satisfied Require

[0004] Ordinary power supply circuits generally cannot meet the above requirements at the same time, so special design solutions are required

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