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Home > News > Optical phase modulation based on PZT piezoelectric ceramics

Optical phase modulation based on PZT piezoelectric ceramics

2020-05-25

With the update of production technology and the continuous expansion of applications, PZT piezoelectric ceramics have been widely entered into people's field of vision, and their popularity is also rising.

PZT piezoelectric ceramics have the inverse piezoelectric effect, that is, the micro-displacement of the corresponding voltage signal can be generated when the voltage signal is applied. Moreover, they have the characteristics of high resolution at the nanometer level and response speed at the microsecond level, so as to satisfy the precision of optical phase modulation.PZT Piezoelectric Ceramic phase shifter is also the main component of various interference instruments, its accuracy will directly affect the measurement accuracy of interferometer.

According to the difference of optical interference path, the number and types of PZT piezoelectric ceramics used are different, which can be divided into single branch and multiple branch. According to the different use scenarios of customers, the core will provide a variety of piezoelectric ceramics schemes for phase modulation/phase shift tomorrow.
When optical fiber is used as the transmission medium of light, such as optical fiber differential interferometer and tunable optical fiber laser, the bit contact of light changes with the propagation length.
For example, the fiber is wound to PZT Piezoelectric ceramic. When the voltage signal is applied, the piezoelectric ceramic will be slightly deformed, which will change the length and refractive index of the fiber wound to PZT.
When the piezoelectric ceramics undergo periodic micro-deformation, the length of the fiber changes periodically, and the phase of the transmitted light also changes periodically.
For this scenario, the types of PZT piezoelectric ceramics that can be selected are very diverse, influenced by a number of factors such as size, delay time, and adjustment mode.


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