Electro-optic Modulators

Electro-optic Modulators

Keywords: Electro-optic modulator, EOM, pulse picker

List of EO Modulators Drivers Phase Modulator Intensity Modulator Driver 1. Electro-optic Intensity Modulator The STK-KY-AM series electro-optic intensity modulator utilizes the electro-optical effect of lithium niobate and push-pull Mach-Zehnder inte

STJ Series Electro-optical Light Modulators

The fiber-coupled integrated optical modulators are ideal for the amplitude or phase modulation of laser light. You can cover wavelengths of between 500 and 1600nanometers. 

The modulators are based on electro-optical crystals and make use of their rapid electro-optical effect. You can use them to influence the phase or amplitude of light up to high modulation frequencies in the gigahertz range. In addition, the compact devices have a high optical power stability, low modulation voltages and high extinction ratios.

 The light is easily coupled into the integrated optical light modulators using optical fibers and connectors. The modulators can also be equipped with specially adapted control units on request, such as a pulse picker control unit. In addition to standard light modulators, we also develop and manufacture customer-specific components to meet your specific requirements.

 

Benefits

  • Powerful: High optical power stability and extinction ratios

  • Fast: Broadband signal processing up to the gigahertz range

  • Versatile: Can be used at a variety of wavelengths in the VIS and IR spectral range

  • User-friendly: Couple in and out laser light easily via optical fibers and connectors

  • Customized: Custom-made components to meet your requirements

Fields of Application

  • Analog modulation with high dynamics

  • Digital modulation

  • Short pulse generation

  • Pulse shaping

  • Exposure technology

  • Laser-scanning microscopy

  • Interferometric measurement technology

  • Sideband generation

  • Optical coherence tomography

1. Integrated Optical Amplitude Modulator STJ-AMxxx

The Integrated Optical Amplitude Modulator STJ-AMxxx is a compact fiber-coupled waveguide-based electro-optical modulator that works based on MgO:LiNbO3 and LiNbO3 crystals. Providing fast electro-optical response, it allows amplitude modulation with frequencies as high as the Gigahertz range. Available modulators can handle wavelengths in the visible and the infrared spectral range. Standard-designed modulators use polarization maintaining single mode fibers to couple the light in and out. They may also be configured with fiber systems or connectors of different types. Each modulator may be fitted with a control & driver unit on special request. 

Benefits

  • Application in the VIS or IR spectrum

  • High modulation frequencies

  • Single mode fiber-coupling

  • High extinction ratio

  • Low switching voltage

 Applications

  • Analog and digital modulation

  • Short laser pulse generation

  • Pulse generation in oscillator amplifier systems

  • Pulse picking

  • Laser Scanning Microscopy

  • Metrology 

Integrated optical amplitude modulator STJ-AMxxx


AM635

AM705

AM830

AM1064

AM1550

Wavelength [nm]

635

705

830

1064

1550

Spectral bandwidth [nm]

± 20

± 20

± 30

± 40

± 50

Insertion loss, typical [dB]

7

7

6

5.5

4.5

Extinction, typical

500 : 1

500 : 1

800 : 1

1000 : 1

1000 : 1

Minimum optical rise time 10/90, typical

200 ps

200 ps

200 ps

200 ps

200 ps

Optical connection, input

Standard

Polarization maintaining single mode fiber*




Fiber connector

Bare fiber, FC/PC connector or FC/APC connector**  



Optical connection, output

Standard

Polarization maintaining single mode fiber*




Optional

Single mode or multi mode fiber




Fiber connector

Bare fiber, FC/PC or FC/APC connector**



Half wave voltage, typical

2.5 V

2.5 V

2.5 V

3 V

5 V


Maximum bias modulation frequency (sine) [kHz]/   Maximum optical input power (cw)

1/ 20mW

1/ 20mW

1/ 30mW

1/300mW

1/300mW


Dimensions L   x W x H [mm]

(housing,   without fiber feed-through)

96x19x10

96x19x10

96x19x10

96x19x10

96x19x10


  • * Standard: bow-tie-type, optional: Panda-type

  • ** Standard: wide-key connector, optional: small-key connector

Integrated optical amplitude modulator (bias version)


STJ-AM635b

STJ-AM705b

STJ-AM830b

STJ-AM1064b

STJ-AM1550b

Wavelength [nm]

635

705

830

1064

1550

Spectral bandwidth [nm]

± 20

± 20

± 30

± 40

± 50

Insertion loss, typical [dB]

7

7

6

5.5

4.5

Extinction, typical

500 : 1

500 : 1

800 : 1

1000 : 1

1000 : 1

Minimum optical rise time 10/90, typical

200 ps

200 ps

200 ps

200 ps

200 ps

Optical connection, input

Standard

Polarization maintaining single mode fiber*


Fiber connector

Without/ FC/PC/ FC/APC**

Optical connection, output

Standard

Polarization maintaining single mode fiber*


Optional

Single mode


Fiber connector

Without/FC/PC/FC/APC**

Half wave voltage RF/bias [V]

2.52.5

2.52.5

2.52.5

3/3

5 /5

Minimum optical rise time RF 10/90, typical

500ps

500ps

500ps

500ps

500ps

Maximum bias modulation frequency (sine) [kHz]

1

1

1

1

1

Maximum optical input power (cw)

20

20

30

300

300

Dimensions L   x W x H [mm]

96x31x10

96x31x10

96x31x10

96x31x10

96x31x10

  • * Standard: bow-tie-type, optional: Panda-type

  • ** Standard: wide-key connector, optional: small-key connector 

2. Integrated Optical Phase Modulator STJ-PMxxx 

The Integrated Optical Phase Modulator STJ-PMxxx is a compact fiber-coupled waveguide-based electro-optical modulator that works based on MgO:LiNbO3 and LiNbO3 crystals. Providing fast electro-optical response, it allows phase modulation with frequencies as high as the Gigahertz range. Available modulators can handle wavelengths in the visible and the infrared spectral range. Standard-designed modulators use polarization maintaining single mode fibers to couple the light in and out. They may also be configured with fiber systems or connectors of different types. 

Benefits

  • Application in the VIS or IR spectrum

  • High modulation frequencies

  • Single mode fiber coupling

  • Low modulation voltage 

Applications

  • Analog and digital modulation

  • Sideband generation

  • Interferometric metrology

  • Optical coherence tomography 


STJ-PM635

STJ-PM705

STJ-PM830

STJ-PM1064

STJ-PM1550

Wavelength [nm]

635

705

830

1064

1550

Spectral bandwidth [nm]

± 20

± 20

± 30

± 40

± 50

Insertion loss, typical [dB]

6

5

5

4

3

Minimum optical rise time 10/90, typical

200 ps

200 ps

200 ps

200 ps

200 ps

Optical connection, input

Standard

Polarization maintaining single mode fiber*


Fiber connector

Bare fiber, FC/PC connector or FC/APC connector**

Optical connection, output

Standard

Polarization maintaining single mode fiber*


Optional

Single mode or multi mode fiber


Fiber connector

Bare fiber,, FC/PC connector or FC/APC   connector**

Half wave voltage, typical [V]

5

5

4.5

6

10

Maximum optical input power (cw) [mW]

20

20

30

300

300

Dimensions L   x W x H [mm]

96x19x10

96x19x10

96x19x10

96x19x10

96x19x10

  • * Standard: bow-tie-type, optional: Panda-type

  • ** Standard: wide-key connector, optional: small-key connector 

STKY Series EO Light Modulators and Drivers

List of EO Modulators & Drivers

  • Phase Modulator

  • Intensity Modulator

  • Driver

1. Electro-optic Intensity Modulator

The STK-KY-AM series electro-optic intensity modulator utilizes the electro-optical effect of lithium niobate and push-pull Mach-Zehnder interference structure to achieve intensity modulation of optical signals. It features low insertion loss, high modulation bandwidth, high extinction ratio, low half-wave voltage and high damage optical power. This product is mainly used for electro-optical signal conversion in high-speed optical fiber communication systems, the generation of light sidebands, high extinction ratio light pulse generation in quantum communication, microwave fiber link and other fields.

electro-optic modulator

Key Features

  • Wavelengths optional

  • Low half-wave voltage

  • High bandwidth

  • Low insertion loss

Applications

  • High-speed optical fiber communication systems

  • Microwave fiber link

  • Quantum communication

ParametersSymbolSTK-KY-AM-08STK-KY-AM-10STK-KY-AM-15-10GSTK-KY-AM-15-20G
Wavelength
830±401064±601550±100nm155±100nm
Insertion lossIL<5 dB<4 dB<4 dB<4.5 dB
Optical return lossORL-40 dB-45 dB-45dB-45dB
Bandwidth (-3dB)S212.5GHz10GHz-10GHz20GHz
Rise time 10%~90%tr150ps35ps35ps18ps
Half-wave voltage
@50KHz, RF
5V4.5V4V5V
Half wave voltage @Bias6V6V5V5V
Extinction ratioER28dB30dB>25dB>25dB
Input resistanceZRF50 @RF, 1M @Bias
Electrical interface
SMA(f)K(f)
Electrical return lossS11<-10dB
Input fiber
PM Panda slow axis alignment
Output fiber
Single mode fiber or PM fiber
Fiber connector
FC/APC or customer specified
Operating temperatureTop-10~60C
Storage temperatureTst-40~80C
RF input powerPi<28dBm
Max. input optical powerPo30mW50mW100mW100mW

1.1 1064nm High Extinction Ratio Electro-optic Intensity Modulator STK-KY-AM-10

electro-optic modulator

Key Features

  • 1064nm Operation

  • Low insertion loss

  • 3dB bandwidth 5GHz

  • Low half-wave voltage

  • High Extinction Ratio >50dB

Applications

  • Optical Pulse Generation

  • Optical fiber sensing system

  • Laser mode locking

The 1064nm high extinction ratio electro-optical intensity modulator integrates two Mach-Zehnder intensity modulators with a push-pull structure, which can achieve an extinction ratio of up to 50dB. It is used in the fields of high-speed optical pulse generation, fiber sensing, and laser mode locking.

Block diagram

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ParametersSymbolMin.Typ.Max.Unit
Optical Parameters
Cystal
LiNbO3 X-Cut Y-Prop
Waveguide process
APE
Wavelength
98010641100nm
Insertion loss*IL
78dB
Optical return lossORL

-40dB
Extinction ratio @DCER@DC50

dB
Polarization extinction ratio*PER2528
dB
FiberInput
Panda PM 980
Output
Panda PM 980
Fiber connector
FC/PC、FC/APC or user specified
Electrical Parameters
Bandwidth(-3dB)S215

GHz
Half-wave voltage VpiRF1 & RF2Vπ@50KHz
4.55V
Bias1 & Bias2Vπ@Bias
45V
Electrical return lossS11
-12-10dB
Input impedanceRF1 & RF2ZRF50
Bias1 & Bias2ZBIAS1M
Electrical connectorRF1 & RF2
SMA(f)
Bias1 & Bias2
4pin

*with connector

Absolute Maximum Ratings

ParametersSymbolUnitMin.Typ.Max.
Input optical powerPin,MaxdBm

10
RF input power
dBm

28
Bias voltageVbiasV-15
15
Operating temperatureTopºC-10
60
Storage temperatureTstºC-40
85
HumidityRH%5
90
Dimension
mm
111x12.5x9

Ordering Information

  • STK-KY-AM-10-BW-PP-FA/FP-HER

  • WL—Wavelength: 10-1064nm

  • BW—Bandwidth: 5G---5GHz

  • FA/FP—Connector: FA---FC/APC; FP---FC/PC

1.2 1550nm High Extinction Ratio Electro-optic Intensity Modulator

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Key Features

  • C and L-Band Operation

  • Low insertion loss

  • 3dB bandwidth 10GHz

  • Extinction ratio 35/40dB

  • Low half-wave voltage

  • Integrated Monitor Photodiode

  • Telecordia GR-468-CORE

Applications

  • Microwave fiber link

  • Quantum communication

  • Optical pulse generation

  • Optical fiber sensing system

  • Laser mode locking

The 1550nm High Extinction Ratio LiNbO3 electro-optical intensity modulator based on the M-Z push-pull structure has a low half-wave voltage and stable physical and chemical characteristics, and the device has a high response rate, high extinction ratio(>40dB) and is therefore widely used in microwave fiber link, Quantum communication, optical Q-switched systems, laser mode-locking, and fiber sensing .

Schematic diagram

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ParametersSymbolMin.Typ.Max.Unit
Optical Parameters
Wavelength
1525
1565nm
Insertion loss(with connector)IL
45dB
Optical return lossORL

-45dB
Extinction ratio @DCER@DC3540
dB
FiberInput
Panda PM Fujikura SM 15-P-8/125-UV/UV-400
Output
Panda PM Fujikura SM 15-P-8/125-UV/UV-400
Fiber interface
FC/PC、FC/APC or user specified
Electrical Parameters
Bandwidth(-3dB)S211012
GHz
Rise time (10%~90%)Tr35

ps
Half-wave voltage VpiRFVπ@50KHz

5V
BiasVπ@Bias

6V
Electrical return lossS11
-12-10dB
Photodiode ResponsivityRP10-3

A/W
Input impedanceRFZRF50
BiasZBIAS1M
Electrical interface
SMA(f)
Dimension
111x12.5x9 mm

Absolute Maximum Ratings

ParametersSymbolUnitMin.Typ.Max.
Input optical powerPin,MaxdBm

20
RF input power
dBm

28
Bias voltageVbiasV-20
20
Operating temperatureTopºC-10
60
Storage temperatureTstºC-40
85
HumidityRH%5
90

Characteristic Curve

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Ordering Information: STK-KY-AM-WL-BW-PP-FA/FP-ER

  • WL—Wavelength:15-1550nm

  • BW—Bandwidth:10G---10GHz 20G-20GHz

  • FA/FP—Connector:FA---FC/APC; FP---FC/PC

  • ER----Extinction Ratio: 35dB, 40dB

1.3 10GB 1550nm All-in-one Electro-optic Modulator STK-MU-15-NRZ

We can provide with the driver for the above electro-modulators and integrate the modulator, amplifier and relevant controllers together. The user can manually or automatically set the bias points. At the manual setting mode, the bias can be displayed and the EO modulator and amplifier individually operate. At the automatic setting mode, the user can set various bias points according to the demand and the bias point is locked and displayed. The modulation performance of the modulator is not influenced by external factors such as environment temperature and vibration.

electro-optic modulator EOM


SymbolMinTypicalMaxUnit
Optical parameters
Wavelengthl152015501610nm
Crystal
LiNbO3
Insertion loss@PeakIL
4.55.5dB
@QIL
78dB
Optical return lossORL

-45dB
Extinction ratio @DCER@DC2528
dB
FiberInput
Panda PM Fujikura SM 15-P-8/125-UV/UV-400
Output
Corning SMF-28
Electrical parameters
Bandwidth (-3dB)S211012
GHz
Working speed
10K
12.5Gbps
Input signal format

NRZ

Input signal amplitudeVi0.250.40.8Vpp
Half-wave voltage @10Gbps4.55.0
V
Dynamic extinction ratio@10Gbps NRZDER12

dB
Rise time (10%-90%)Tr3035
ps
Additional vibration*JitterRMS1.11.72.0ps
Amplification gainG0
25dB
Loss from wavesS11
-12-10dB
Input impedance @RF inputZRF
50
W
Manual setting mode
Bias voltageVbias-10
10V
Adj. accuracy

0.1
V
Automatic setting mode
Bias
Null, Q+/-, Peak
Vibration periodF
1
KHz
Vibration amplitudeVpp
2%Vπ

Harmonic extinction ratio
4050
dB
Optical power stabilityDP

0.1dB
Duty
45
55%
Other parameters
Input interface
SMA(f)
Optical interfaceInput
FC/APC PM
Output
FC/APC SM
Input powerVDCAC 220V
DimensionLxWxH270x300x90mm
Weight
<5kg
Port
RS232
Display contentsManual
Amplification gain, real-time bias voltage
Automatic
Amplification gain, bias Vpi, real-time bias voltage, bias lock status

EOM, electro-optic modulator

Ordering Information: STK-MU-W-XX-BW-FB-YY-M/A

  • W: wavelength such as 15-1550nm, 13-1310nm, 10-1064nm

  • XX: modulation method such as NRZ, DPSK, DQPSK, DPQPSK, AN, PM

  • BW: bandwidth such as 02-2.5G, 10-10G, 20-20G, 40-40G

  • FB: input/output fiber type such as PP (input & output are PM), PS (input is PM and output is SM)

  • YY: fiber connector such as FA-FC/APC, FP-FC/PC

  • M/A: control mode, M is manual and A is automatic.

2. Electro-optic Phase Modulator

The STK-KY-PM series electro-optic phase modulator utilizes the electro-optical effect of lithium niobate to achieve phase modulation of optical signals, and uses titanium diffusion or proton exchange process to fabricate optical waveguides, which can achieve dual-polarization or single-polarization phase modulation. It has low insertion loss, high modulation bandwidth, low half-wave voltage, high damage optical power, etc. This product is mainly used for optical chirp control in high-speed optical communication systems, phase delay in coherent communication systems, the generation of optical sidebands, phase modulation in quantum communication, reducing stimulated Brillouin scattering (SBS) in analog optical fiber communication systems and other fields.

electro-optic modulator

Key Features

  • Wavelengths optional

  • Low half-wave voltage

  • Low insertion loss

  • High damage optical power

Applications

  • Optical fiber sensing systems

  • Optical fiber communication

  • Laser coherent synthesis

  • Phase delay (movement)

  • Quantum communication

ParametersSymbolSTK-KY-PM830-1STK-KY-PM1064-1STK-KY-PM1550-1STK-KY-PM1550-2
Wavelength
830+/-401064+/-601550+/-50nm
Insertion lossIL<5 dB<4 dB<4 dB4 dB
Optical return lossORL-40 dB-45 dB-45dB-40 dB
Bandwidth (-3dB)S212.5GHz10GHz-300MHz10GHz
Rise time 10%~90%tr150ps35ps1ns35ps
Vpi@50KHz5V4.5V4V4V
Input resistanceZRF501M50
Electrical interface
SMA(f)3pinSMA(f)
Electrical return lossS11<-10dB
Input/output fiber
PM Panda slow axis alignment
Fiber connector
FC/APC or customer specified
Operating temperatureTop-10~60C
Storage temperatureTst-40~80C
RF input powerPi<28dBm
Maximum input
optical power
Po30mW100mW100mW100mW

2.1 1550nm Optical CS-SSB Modulation Modules

The STK-KY-MU-SSB-15 series product is an optical CS-SSB modulation module developed by our company. The modulation module integrates Mach-Zehnder dual parallel modulators, bias point control circuits, 90 degree hybrid splitter, can achieve stable and reliable single sideband modulation, and can switch between left and right sideband control as needed. This product is mainly used in Brillouin fiber sensing systems, microwave photonics, gas detection and other fields.

electro-optic phase modulator

Key Features

  • Wavelength C-band

  • Sideband suppression ratio:>30dB

  • Carrier suppression ratio: >26dB

  • Up and down sidebands

  • Convenient to use and reliable

Applications

  • Optical fiber sensing system

  • Microwave photonics

  • Gas detection

  • Optical fiber communication systems

ParametersSymbolMin.Typ.Max.Unit
Carrier Optical Source Parameters (Provided by the user)
Laser typeDFB source or wavelength tunable source
Wavelengthl1510
1560nm
Line widthDn-
1MHz
Polarization extinction ratioPER
20-dB
PowerPi
10100mW
Modulator Specification Parameters
Modulator typeX-cut double parallel M-Z modulator
Modulator bandwidth S21@3dBBW1012-GHz
Insertion lossIL
78dB
Return lossRL-45-50-dB
Bias Controller Parameters
Automatic feedback bias controller
Jitter mode
Jitter signal frequency
40010001400Hz
Jitter signal amplitude
10501000mV
Preset work point
Lowest point
CS-SSB Optical Output Signal
Single sideband modulation range*F1
12GHz
Input RF powerPRF-5
5dBm
Sideband suppression ratio @1550nm
3035-dB
Carrier suppression ratio @1550nm
26
32dB
Interface
Input fiber
Panda type polarization-maintaining fiber
Output fiber
Panda type polarization-maintaining fiber
Fiber optic interface
PM FC/APC Slow axis alignment
Input RF signal interface
SMA(50Ω)
Bias controller communication interface
J30J
Other Parameters
Operating temperatureTo+15-+35ºC
Stored temperatureTs-40-+75ºC
Power supplyV-15-V
Module sizeLWH160*125*20 mm
Weight
-0.3-Kg

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3. Drive Module for Electro-optic Modulator

electro-optic modulator

Key Features

  • 10G, 20G, 40GHz optional bandwidth

  • Gain> 25dB

  • Saturated output Max.25dBm (11Vpp)

  • Rise time Min.<8ps

  • Low jitter

  • DC12V power supply

  • Easy to use

Applications

  • High-speed optical fiber communication system

  • Quantum communication

  • Picosecond pulse amplification

  • Optical fiber sensing system

electro-optic modulator

Product List

  • 10G driver module

  • 10G high output driver module

  • 20G driver module

  • 40G driver module

The STK-KY-MD-XX series electro-optic modulator driver is a broadband, high-output driver amplifier mainly used for lithium niobate electro-optical intensity and phase modulator. Its working bandwidth is up to 30K ~ 40GHz, and it can achieve a maximum of 42Gbps NRZ wideband signal amplification up to 8Vpp. It is mainly used in high-speed optical fiber communication systems, quantum communication, picosecond pulse amplification, and optical fiber sensing systems.

ParametersSymbolUnitSTK-KY-MD-10GSTK-KY-MD-10G-HOSTK-KY-MD-20GSTK-KY-MD-40G
Bandwidth(-3dB)S21-HighGHz>10>8>20>35
S21-LowKHz301003030
Data rate
bps100k~12.5G100k~10G100k~25G100k~42G
GainGdB>26>30>28>28
Gain rippleDGdB<3<3<3<3
Output amplitudeVoutVpp81188
Saturated output powerPsdBm23252323
Rise time (10% -90%)Trps3540188
JitterJitterRMSps<2<2<1<1
IsolationS12dB<-40
Electrical return lossS11dB<-12<-10<-10<-10
RF connector

SMA(f)K(f)
Operating VoltageVDCV
DC 12V
Working currentIomA
<500
DimensionsLxWxHmm
50x33x15

Absolute Maximum Ratings

ParametersSymbolUnitMin.Typ.Max.
Input signal amplitudeVinVpp

1.5
Operating VoltageDCV11.5
13
Operating temperatureTopºC-20
60
Storage temperatureTstºC-40
85

Characteristic Curve

electro-optic modulator eom

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Typical Application

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