The PZTx-LSM phase modulator is a phase modulation device composed of optical fiber wound on piezoelectric ceramic (PZT) and using the PZT piezoelectric effect. It adopts a unique multi-layer winding method, which makes the product have high stability and high-speed modulation characteristics. It can be equipped with a variety of types of optical fibers (see ordering information) and can be applied to open-loop phase modulation and demodulation, variable optical fiber delay line, optical fiber interferometer, & OTDR, optical fiber vibration calibration and other optical sensing fields. The module is compact and small, which is convenient for customers to integrate the system. Low voltage driving capability, suitable for standard signal source driving capability.
Performance Indicators
Product | PZT1 | PZT2 | PZT3 | PZT4 | PZT5 |
Operating Wavelength | 600-1625 nm (Operating wavelength can be customized) |
Resonant frequency | Optical phase modulation constant1 | 10rad/V | 16 rad/V | 34 rad/V | 73rad/V | 101 rad/V |
Fiber displacement1 | 2.4 um/V | 4um/V | 8.5um/V | 18um/V | 25um/V |
Half-wave voltage1 | 0.323V | 0.194V | 0.091V | 0.043V | 0.031V |
<5kHz | Optical phase modulation constant 1 | 0.6 rad/V | 1.2rad/V | 2.0rad/V | 4.0rad/V | 5.6rad/V |
Fiber displacement 1 | 0.15 um/V | 0.30 um/V | 0.50um/V | 1.0um/V | 1.4um/V |
Half-wave voltage 1 | 5.160V | 2.580V | 1.55V | 0.775V | 0.554V |
Length of optical fiber active area | 1.5 m | 3 m | 5 m | 10 m |
|
Static Insertion Loss | SM | <0.1 dB | <0.2 dB | <0.3 dB | <0.5 dB | <0.5 dB |
PM | <0.5 dB | <0.5 dB | <0.5 dB | <0.7 dB | <0.8 dB |
Polarization extinction ratio PER2 | PM | >25 dB | >20 dB | >25 dB | >20dB | >20dB |
Equivalent capacitance | 7-9nF | 17~22nF |
Resonant frequency | 27~32KHz |
Drive voltage | 0-500V | Drive current | less-than 5mA |
Electrical interface | SMA-K |
Fiber type | SM or other | Customizable fiber type |
Output type | 900um sleeve or other | Customizable fiber output type |
Connector type | FC/APC or other | Customizable connector type |
Fiber length | 1 m or other | Customizable fiber length |
Operating temperature | -40～+65℃ |
Storage temperature | -40～+75℃ |
Withstand optical power | 1000mW |
Dimensions (L×W×H) | 49×49×21mm | 49×49×29mm |
Note 1: The error is ±15%, and is for testing at 1550nm wavelength.
2: The extinction ratio of polarization-maintaining PZT refers to the extinction ratio tested without connectors. With connectors, PER>18dB is considered qualified.
Test chart
Figure 1 PZT3 builds equal-arm-length Mach-Zehnder interferometer test spectrum
Test Data
Figure 2 Driving voltage and fiber expansion when the driving frequency is the resonant frequency
Figure 3 Driving voltage and fiber expansion coefficient during 1HZ-100KHz frequency sweep
PZT High-speed Fiber Stretcher(Phase modulator).pdf
