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PZT drive circuit for tunable laser

A technology for driving circuits and voltage regulating circuits, applied in lasers, laser components, circuits, etc.

Inactive Publication Date: 2012-03-07
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, different frequencies and different voltages need to be added to the PZT to achieve different modulation amplitudes of the laser. According to the characteristics of the domestic manufacturer's PZT, to achieve a modulation amplitude of 1pm, it is necessary to add a signal peak-to-peak voltage exceeding 100V to the PZT in actual measurement. All The signal generating device cannot meet this demand

Method used

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  • PZT drive circuit for tunable laser
  • PZT drive circuit for tunable laser
  • PZT drive circuit for tunable laser

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] as attached figure 2 The PZT driving circuit shown generates a high-voltage sine wave signal, which is used to drive the deformation of the PZT, so that the grating of the laser added to the PZT changes, and the laser wavelength can be tuned. The circuit of the present invention includes a sine wave generating circuit 1 , a voltage adjusting circuit 2 and a voltage boosting circuit 3 .

[0026] figure 2 The middle chip U1 is a high-frequency signal generating device ICL8038, the operational amplifier model is NE5532, T1 and T2 are audio transformers with a turn ratio of 1:3 after series connection, the material is permalloy, transistors Q1 and Q2 are paired tubes, D1, D2 is a common diode, resistors RA2, RB2, and R1 are adjustable potentiometers, resistors RA1, RB1, R2, R3, R4, R5, and R6 are resistors in common packages, R7, R8, and R9 are power resistors, and C is a capacitor element.

[0027] The peripheral pins of the integrated chip U1 and the positive power s...

Embodiment 2

[0033] as attached image 3 The implementation of the PZT drive circuit shown is as follows:

[0034] image 3 The middle chip is a high-frequency signal generating device, the operational amplifier model is OPA2227, the transistors T1 and T2 are audio transformers with a turn ratio of 1:3 after being connected in series, the material is permalloy, the transistors Q1 and Q2 are paired tubes, D1 and D2 It is a common diode, the resistor Rin2 is an adjustable potentiometer, the resistors Rin1, R0, R2, R3, R4, R5, and R6 are ordinary packaged resistors, the resistors R7, R8, and R9 are power resistors, and CF is a capacitive element.

[0035] The integrated chip U1 is MAX038, and its periphery is connected through a resistor Rin1, a potentiometer Rin2 and a capacitor CF, and Rin1 and Rin2 together form a resistor Rin. The frequency of the output waveform is given by: f = 5 Rin × CF ...

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PUM

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Abstract

The invention discloses a PZT drive circuit for a tunable laser. The PZT drive circuit comprises a sine wave generating circuit, a voltage control circuit and a booster circuit, wherein the signal output end of the sine wave generating circuit is connected with the input end of the voltage control circuit; the output end of the voltage control circuit is connected to the input end of the booster circuit; and the booster circuit boosts voltage.

Description

technical field [0001] The invention relates to a piezoelectric ceramic (PZT) drive circuit, in particular to a PZT drive circuit for a tunable laser. Background technique [0002] To realize a tunable laser, one of the ways is to place the fiber laser on the PZT, and change the distance of the grating through the deformation of the PZT to achieve the tunable laser wavelength. In this way, different frequencies and different voltages need to be added to the PZT to achieve different modulation amplitudes of the laser. According to the characteristics of the domestic manufacturer's PZT, to achieve a modulation amplitude of 1pm, it is necessary to add a signal peak-to-peak voltage exceeding 100V to the PZT in actual measurement. All The signal generating device can not meet this demand. [0003] The existing devices that can be used as PZT drive signals are divided into two types, one is adjustable in frequency, but the peak-to-peak value of the output waveform is relatively l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/10H01S3/105
Inventor 木素真施安存段靖远李芳
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI