Piezoelectric ceramic driving circuit used for optical fiber stress adjustment

Abstract

This invention relates to a piezoelectric ceramics driver circuit used for regulating optical fiber stress. It is composed of three parts: Part 1, the voltage amplifier stage circuit, comprising: a constant-current source circuit composed of triode Q1 and resistances R1, R2 and R3; a feedback comparator composed of R4, R5 and R6, and Q2, Q3; and a regulating tube Q4; Part 2, the power amplifier stage circuit, comprising: a selected high power and high voltage-resisting N-channel VMOS tube IRF830 substituted for the existing complementary symmetric circuit; and Part 3, the discharging 100p circuit, comprising: diodes D1, D2 and triode Q5 and a comparator. This invention has advantages of: simple structure, low energy consumption, small volume, stable working, safety, excellent dynamic response to non-regulated signals, quick response, wide response frequency range.

Description

technical field The invention belongs to the technical field of electronic circuits, and in particular relates to a piezoelectric ceramic drive circuit for optical fiber stress adjustment. Background technique The optical fiber is wound on the piezoelectric ceramic (PZT) in the form of stress, and the length of the optical fiber is controlled or compensated by the piezoelectric ceramic, which has very important applications in the fields of optical fiber precision control such as optical fiber sensing and optical coherence. Since the optical fiber is a fragile and sensitive material, it is very susceptible to changes in length due to fluctuations in ambient temperature, stress, etc., so that the phase of the light propagating in the optical fiber will change, affecting the performance and stability of the optical fiber device system. In active mode-locked fiber laser cavity length compensation. Because ultra-high-speed active mode-locked fiber lasers can generate optical so...

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Problems solved by technology

Although this kind of circuit can finally output a relatively stable amplified voltage, there is often a long transition process before reaching the steady state, so it is only suitable for static occasions where the input voltage rarely changes or changes slowly.

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