PZT High-speed Fiber Stretcher(Phase modulator)-LogFile

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PZT High-speed Fiber Stretcher(Phase modulator)

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.

Product Features

● Based on PZT piezoelectric effect

● Low insertion loss

● Extremely small package size

● Multiple fiber types available (SM/PM)

● High-speed modulation rate

● Low voltage drive capability

● Unique winding method

Technical Specification

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 displacement 1		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		15 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			1000 mW
Dimensions (L×W×H)			49×49×21mm		49×49×29 mm

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

Dimensions

unit（mm）

Applications

● Optical (fiber) interferometer

● Phase modulator

● Fiber delay line

● Phase_OTDR

● Fiber optic sensor

● Hydrophone

Ordering Info

PZT

Product Name

Modularity

Fiber Type

Connector Type

Pigtail length

PZT1：1.5m PZT2：3m PZT3：5m PZT4 ：10m PZT5 ：15m

SMF1：SMF1550 SMF2： HI1060

SMF3： HI780 PMF1： PM1550 PMF2：PM1310 PMF3 ： PM1060 PMF4 ： PM850 MMF1：MM 62.5

MMF2：MM 50

FA: 900um tube FC/APC connector

FC: 900um tube FC/PC connector

NC1: 900um sleeve pigtail

NC2: 250um coated pigtail

10B: 1m optical fiber length, precision made according to Class B

15A: 1.5m optical fiber length, precision made according to Class A

NC: other special requirements,

Note:

1 Class A length accuracy is single mode ±1cm, polarization maintaining ±2cm

2 Class B length accuracy is single mode ±3cm, polarization maintaining ±5cm

The default is Category B. If Category A is required, please confirm with the salesperson.