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
List of EO Modulators & Drivers
Phase Modulator
Intensity Modulator
Driver
The STK-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.
Wavelengths optional
Low half-wave voltage
High bandwidth
Low insertion loss
High-speed optical fiber communication systems
Microwave fiber link
Quantum communication
Parameters | Symbol | STK-AM-08 | STK-AM-10 | STK-AM-15-10G | STK-AM-15-20G |
Wavelength | 830±40 | 1064±60 | 1550±100nm | 155±100nm | |
Insertion loss | IL | <5 dB | <4 dB | <4 dB | <4.5 dB |
Optical return loss | ORL | -40 dB | -45 dB | -45dB | -45dB |
Bandwidth (-3dB) | S21 | 2.5GHz | 10GHz- | 10GHz | 20GHz |
Rise time 10%~90% | tr | 150ps | 35ps | 35ps | 18ps |
Half-wave voltage @50KHz, RF | Vπ | 5V | 4.5V | 4V | 5V |
Half wave voltage @Bias | Vπ | 6V | 6V | 5V | 5V |
Extinction ratio | ER | 28dB | 30dB | >25dB | >25dB |
Input resistance | ZRF | 50 @RF, 1M @Bias | |||
Electrical interface | SMA(f) | K(f) | |||
Electrical return loss | S11 | <-10dB | |||
Input fiber | PM Panda slow axis alignment | ||||
Output fiber | Single mode fiber or PM fiber | ||||
Fiber connector | FC/APC or customer specified | ||||
Operating temperature | Top | -10~60C | |||
Storage temperature | Tst | -40~80C | |||
RF input power | Pi | <28dBm | |||
Max. input optical power | Po | 30mW | 50mW | 100mW | 100mW |
1064nm Operation
Low insertion loss
3dB bandwidth 5GHz
Low half-wave voltage
High Extinction Ratio >50dB
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.
Parameters | Symbol | Min. | Typ. | Max. | Unit | ||
Optical Parameters | |||||||
Cystal | LiNbO3 X-Cut Y-Prop | ||||||
Waveguide process | APE | ||||||
Wavelength | 980 | 1064 | 1100 | nm | |||
Insertion loss* | IL | 7 | 8 | dB | |||
Optical return loss | ORL | -40 | dB | ||||
Extinction ratio @DC | ER@DC | 50 | dB | ||||
Polarization extinction ratio* | PER | 25 | 28 | dB | |||
Fiber | Input | Panda PM 980 | |||||
Output | Panda PM 980 | ||||||
Fiber connector | FC/PC、FC/APC or user specified | ||||||
Electrical Parameters | |||||||
Bandwidth(-3dB) | S21 | 5 | GHz | ||||
Half-wave voltage Vpi | RF1 & RF2 | Vπ@50KHz | 4.5 | 5 | V | ||
Bias1 & Bias2 | Vπ@Bias | 4 | 5 | V | |||
Electrical return loss | S11 | -12 | -10 | dB | |||
Input impedance | RF1 & RF2 | ZRF | 50 | ||||
Bias1 & Bias2 | ZBIAS | 1M | |||||
Electrical connector | RF1 & RF2 | SMA(f) | |||||
Bias1 & Bias2 | 4pin |
*with connector
Parameters | Symbol | Unit | Min. | Typ. | Max. |
Input optical power | Pin,Max | dBm | 10 | ||
RF input power | dBm | 28 | |||
Bias voltage | Vbias | V | -15 | 15 | |
Operating temperature | Top | ºC | -10 | 60 | |
Storage temperature | Tst | ºC | -40 | 85 | |
Humidity | RH | % | 5 | 90 | |
Dimension | mm | 111x12.5x9 |
STK-AM-10-BW-PP-FA/FP-HER
WL—Wavelength: 10-1064nm
BW—Bandwidth: 5G---5GHz
FA/FP—Connector: FA---FC/APC; FP---FC/PC
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
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 .
Parameters | Symbol | Min. | Typ. | Max. | Unit | |
Optical Parameters | ||||||
Wavelength | 1525 | 1565 | nm | |||
Insertion loss(with connector) | IL | 4 | 5 | dB | ||
Optical return loss | ORL | -45 | dB | |||
Extinction ratio @DC | ER@DC | 35 | 40 | dB | ||
Fiber | Input | 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) | S21 | 10 | 12 | GHz | ||
Rise time (10%~90%) | Tr | 35 | ps | |||
Half-wave voltage Vpi | RF | Vπ@50KHz | 5 | V | ||
Bias | Vπ@Bias | 6 | V | |||
Electrical return loss | S11 | -12 | -10 | dB | ||
Photodiode Responsivity | RP | 10-3 | A/W | |||
Input impedance | RF | ZRF | 50 | |||
Bias | ZBIAS | 1M | ||||
Electrical interface | SMA(f) | |||||
Dimension | 111x12.5x9 | mm |
Parameters | Symbol | Unit | Min. | Typ. | Max. |
Input optical power | Pin,Max | dBm | 20 | ||
RF input power | dBm | 28 | |||
Bias voltage | Vbias | V | -20 | 20 | |
Operating temperature | Top | ºC | -10 | 60 | |
Storage temperature | Tst | ºC | -40 | 85 | |
Humidity | RH | % | 5 | 90 |
WL—Wavelength:15-1550nm
BW—Bandwidth:10G---10GHz 20G-20GHz
FA/FP—Connector:FA---FC/APC; FP---FC/PC
ER----Extinction Ratio: 35dB, 40dB
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.
Symbol | Min | Typical | Max | Unit | ||
Optical parameters | ||||||
Wavelength | l | 1520 | 1550 | 1610 | nm | |
Crystal | LiNbO3 | |||||
Insertion loss | @Peak | IL | 4.5 | 5.5 | dB | |
@Q | IL | 7 | 8 | dB | ||
Optical return loss | ORL | -45 | dB | |||
Extinction ratio @DC | ER@DC | 25 | 28 | dB | ||
Fiber | Input | Panda PM Fujikura SM 15-P-8/125-UV/UV-400 | ||||
Output | Corning SMF-28 | |||||
Electrical parameters | ||||||
Bandwidth (-3dB) | S21 | 10 | 12 | GHz | ||
Working speed | 10K | 12.5G | bps | |||
Input signal format | NRZ | |||||
Input signal amplitude | Vi | 0.25 | 0.4 | 0.8 | Vpp | |
Half-wave voltage @10Gbps | Vπ | 4.5 | 5.0 | V | ||
Dynamic extinction ratio@10Gbps NRZ | DER | 12 | dB | |||
Rise time (10%-90%) | Tr | 30 | 35 | ps | ||
Additional vibration* | JitterRMS | 1.1 | 1.7 | 2.0 | ps | |
Amplification gain | G | 0 | 25 | dB | ||
Loss from waves | S11 | -12 | -10 | dB | ||
Input impedance @RF input | ZRF | 50 | W | |||
Manual setting mode | ||||||
Bias voltage | Vbias | -10 | 10 | V | ||
Adj. accuracy | 0.1 | V | ||||
Automatic setting mode | ||||||
Bias | Null, Q+/-, Peak | |||||
Vibration period | F | 1 | KHz | |||
Vibration amplitude | Vpp | 2%Vπ | ||||
Harmonic extinction ratio | 40 | 50 | dB | |||
Optical power stability | DP | 0.1 | dB | |||
Duty | 45 | 55 | % | |||
Other parameters | ||||||
Input interface | SMA(f) | |||||
Optical interface | Input | FC/APC PM | ||||
Output | FC/APC SM | |||||
Input power | VDC | AC 220 | V | |||
Dimension | LxWxH | 270x300x90 | mm | |||
Weight | <5 | kg | ||||
Port | RS232 | |||||
Display contents | Manual | Amplification gain, real-time bias voltage | ||||
Automatic | Amplification gain, bias Vpi, real-time bias voltage, bias lock status |
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.
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.
Wavelengths optional
Low half-wave voltage
Low insertion loss
High damage optical power
Optical fiber sensing systems
Optical fiber communication
Laser coherent synthesis
Phase delay (movement)
Quantum communication
Parameters | Symbol | STK-PM830-1 | STK-PM1064-1 | STK-PM1550-1 | STK-PM1550-2 |
Wavelength | 830+/-40 | 1064+/-60 | 1550+/-50nm | ||
Insertion loss | IL | <5 dB | <4 dB | <4 dB | 4 dB |
Optical return loss | ORL | -40 dB | -45 dB | -45dB | -40 dB |
Bandwidth (-3dB) | S21 | 2.5GHz | 10GHz- | 300MHz | 10GHz |
Rise time 10%~90% | tr | 150ps | 35ps | 1ns | 35ps |
Vpi@50KHz | Vπ | 5V | 4.5V | 4V | 4V |
Input resistance | ZRF | 50 | 1M | 50 | |
Electrical interface | SMA(f) | 3pin | SMA(f) | ||
Electrical return loss | S11 | <-10dB | |||
Input/output fiber | PM Panda slow axis alignment | ||||
Fiber connector | FC/APC or customer specified | ||||
Operating temperature | Top | -10~60C | |||
Storage temperature | Tst | -40~80C | |||
RF input power | Pi | <28dBm | |||
Maximum input optical power | Po | 30mW | 100mW | 100mW | 100mW |
The STK-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.
Key Features
Wavelength C-band
Sideband suppression ratio:>30dB
Carrier suppression ratio: >26dB
Up and down sidebands
Convenient to use and reliable
Optical fiber sensing system
Microwave photonics
Gas detection
Optical fiber communication systems
Parameters | Symbol | Min. | Typ. | Max. | Unit |
Carrier Optical Source Parameters (Provided by the user) | |||||
Laser type | DFB source or wavelength tunable source | ||||
Wavelength | l | 1510 | 1560 | nm | |
Line width | Dn | - | 1 | MHz | |
Polarization extinction ratio | PER | 20 | - | dB | |
Power | Pi | 10 | 100 | mW | |
Modulator Specification Parameters | |||||
Modulator type | X-cut double parallel M-Z modulator | ||||
Modulator bandwidth S21@3dB | BW | 10 | 12 | - | GHz |
Insertion loss | IL | 7 | 8 | dB | |
Return loss | RL | -45 | -50 | - | dB |
Bias Controller Parameters | |||||
Automatic feedback bias controller | Jitter mode | ||||
Jitter signal frequency | 400 | 1000 | 1400 | Hz | |
Jitter signal amplitude | 10 | 50 | 1000 | mV | |
Preset work point | Lowest point | ||||
CS-SSB Optical Output Signal | |||||
Single sideband modulation range* | F | 1 | 12 | GHz | |
Input RF power | PRF | -5 | 5 | dBm | |
Sideband suppression ratio @1550nm | 30 | 35 | - | dB | |
Carrier suppression ratio @1550nm | 26 | 32 | dB | ||
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 temperature | To | +15 | - | +35 | ºC |
Stored temperature | Ts | -40 | - | +75 | ºC |
Power supply | V | - | 15 | - | V |
Module size | LWH | 160*125*20 mm | |||
Weight | - | 0.3 | - | Kg |
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
High-speed optical fiber communication system
Quantum communication
Picosecond pulse amplification
Optical fiber sensing system
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.
Parameters | Symbol | Unit | STK-MD-10G | STK-MD-10G-HO | STK-MD-20G | STK-MD-40G | |
Bandwidth(-3dB) | S21-High | GHz | >10 | >8 | >20 | >35 | |
S21-Low | KHz | 30 | 100 | 30 | 30 | ||
Data rate | bps | 100k~12.5G | 100k~10G | 100k~25G | 100k~42G | ||
Gain | G | dB | >26 | >30 | >28 | >28 | |
Gain ripple | DG | dB | <3 | <3 | <3 | <3 | |
Output amplitude | Vout | Vpp | 8 | 11 | 8 | 8 | |
Saturated output power | Ps | dBm | 23 | 25 | 23 | 23 | |
Rise time (10% -90%) | Tr | ps | 35 | 40 | 18 | 8 | |
Jitter | JitterRMS | ps | <2 | <2 | <1 | <1 | |
Isolation | S12 | dB | <-40 | ||||
Electrical return loss | S11 | dB | <-12 | <-10 | <-10 | <-10 | |
RF connector | SMA(f) | K(f) | |||||
Operating Voltage | VDC | V | DC 12V | ||||
Working current | Io | mA | <500 | ||||
Dimensions | LxWxH | mm | 50x33x15 |
Parameters | Symbol | Unit | Min. | Typ. | Max. |
Input signal amplitude | Vin | Vpp | 1.5 | ||
Operating Voltage | DC | V | 11.5 | 13 | |
Operating temperature | Top | ºC | -20 | 60 | |
Storage temperature | Tst | ºC | -40 | 85 |
SCQ series electro-optic modulators have the features of low insertion loss, wide bandwidth, low half-wave voltage etc and are to be used in space optical communication, time base, pulse generator and quantum optics etc.
SCQ series electro-optic modulators are mainly divided into two groups: intensity modulators and phase modulators. Their working wavelengths are 780nm, 850nm, 1064nm, 1310nm, 1550nm and 2000nm。Other wavelengths are available upon request.
Definition of Part Numbers: SCQ-XX-WW-XG-F-FC
XX: modulator type. AM is intensity modulator and PM is phase modulator.
WW: operation wavelength, such as 850nm, 1064nm, 1310nm,1550nm and 2000nm
XG: operation bandwidth, such as 2.5G, 10G, 40G
F: In-out fiber such as PP (PM/PMF)
FC: fiber connector such as FA (FC/APC), FP (FC/PC)
Part number | Operation wavelength nm | Min wavelength nm | Max wavelength nm | Bandwidth Hz | In/out fiber | Fiber connector |
SCQ-AM-850-10G | 850 | 830 | 870 | 10G | PM/PM | FA, FP |
SCQ-AM-1064-10G | 1060 | 980 | 1150 | 10G | PM/PM | FA, FP |
SCQ-AM-1310-2.5G | 1310 | 1290 | 1330 | 2.5G | PM/PM | FA, FP |
SCQ-AM-1550-2.5G | 1550 | 1530 | 1565 | 2.5G | PM/PM | FA, FP |
SCQ-AM-1550-10G | 1550 | 1530 | 1565 | 10G | PM/PM | FA, FP |
SCQ-AM-1550-20G | 1550 | 1530 | 1565 | 18G | PM/PM | FA, FP |
SCQ-AM-1550-40G | 1550 | 1530 | 1565 | 28G | PM/PM | FA, FP |
1.1 SCQ-AM-1310 Series 1310nm Intensity Modulators
The LiNbO3 intensity modulator is widely used in high-speed optical communication system, laser sensing and ROF systems because of well electro-optic effect. The SCQ-AM series based on MZ structure and X-cut design, has stable physical and chemical characteristics, which can be applied both in laboratory experiments and industrial systems.
Features:
Low insertion loss
Bandwidth: 2.5GHz
Low half-wave voltage
Customization option
Applications:
ROF systems
Quantum key distribution
Laser sensing systems
Side-band modulation
Optical Parameters:
Parameter | Symbol | Min | Typ | Max | Unit |
Operating wavelength | | 1290 | 1310 | 1330 | nm |
Insertion loss | IL | 4 | 5 | dB | |
Optical return loss | ORL | -45 | dB | ||
Switch extinction ratio @DC | ER@DC | 20 | 23 | dB | |
Dynamic extinction ratio | DER | 13 | dB | ||
Optical fiber (Input port) | PM Fiber (125/250μm) | ||||
Optical fiber (Output port) | PM Fiber or SM Fiber (125/250μm) | ||||
Optical fiber interface | FC/PC、FC/APC Or Customization |
Electrical Parameters:
Parameter | Symbol | Min | Typ | Max | Unit |
Operating bandwidth (-3dB) | S21 | 2.5 | GHz | ||
Half-wave voltage (RF) | VΠ@1KHz | 3 | 4 | V | |
Half-wave voltage (Bias) | VΠ@1KHz | 3.5 | 4.5 | V | |
Electrical return loss | S11 | -12 | -10 | dB | |
Input impedance (RF) | ZRF | 50 | W | ||
Input impedance (Bias) | ZBIAS | 1M | W | ||
Electrical interface | SMA(f) |
Limit Conditions:
Parameter | Symbol | Unit | Min | Typ | Max |
Input optical power | Pin, Max | dBm | 20 | ||
Input RF power | dBm | 28 | |||
ias voltage | Vbias | V | -15 | 15 | |
Operating temperature | Top | ℃ | -10 | 60 | |
Storage temperature | Tst | ℃ | -40 | 85 | |
Humidity | RH | % | 5 | 90 |
Order Information:
SCQ | AM | 13 | 2.5G | XX | XX |
SCQ series | Type: AM---Intensity Modulator | Wavelength: 13---1310nm | Operation bandwidth: 2.5G---2.5GHz
| In-Out Fiber type: PP---PM/PM | Optical connector: FA---FC/APC FP---FC/PC SP---Customization |
PORT | Symbol | Note |
In | Optical input port | PM Fiber (125μm/250μm) |
Out | Optical output port | PM and SM Fiber option |
RF | RF input port | SMA(f) |
Bias | Bias control port | 1,2 Bias, 34-N/C |
Part number | Operation wavelength nm | Min wavelength nm | Max wavelength nm | Bandwidth Hz | In/out fiber | Fiber connector |
SCQ-PM-780-10G | 780 | 760 | 800 | 10G | PM/PM | FA, FP |
SCQ-PM-850-10G | 850 | 780 | 890 | 10G | PM/PM | FA, FP |
SCQ-PM-1064-300M | 1060 | 980 | 1150 | 300M | PM/PM | FA, FP |
SCQ-PM-1064-10G | 1060 | 980 | 1150 | 10G | PM/PM | FA, FP |
SCQ-PM-1310-10G | 1310 | 1290 | 1330 | 10G | PM/PM | FA, FP |
SCQ-PM-1550-300M | 1550 | 1530 | 1565 | 300M | PM/PM | FA, FP |
SCQ-PM-1550-10G | 1550 | 1530 | 1565 | 10G | PM/PM | FA, FP |
SCQ-PM-1550-20G | 1550 | 1530 | 1565 | 20G | PM/PM | FA, FP |
2.1 SCQ-PM Series 1310nm Electro-optical Phase Modulators
The LiNbO3 phase modulator is widely used in a high-speed optical communication system, laser sensing, and ROF systems because of well electro-optic effect. The SCQ-PM-1310 series, based on Ti-diffused technology, has stable physical and chemical characteristics, which can meet most applications in laboratory experiments and industrial systems.
Features:
Low insertion loss
Polarization-maintaining
Low half-wave voltage
Dual-polarization option
Application:
Optical communication
Quantum key distribution
Frequency shifting
Optical parameters:
Parameter | Symbol | Min | Typ | Max | Unit | |
Operating wavelength | l | 1290 | 1310 | 1330 | nm | |
Insertion loss | IL | 3.5 | 4 | dB | ||
Optical return loss | ORL | -45 | dB | |||
Polarization extinction ratio | PER | 20 | dB | |||
Optical fiber | Input port | PM fiber(125/250μm) | ||||
Output port | PM fiber(125/250μm) | |||||
Optical fiber interface | FC/PC、FC/APC Or Customization |
Electrical Parameters:
Parameter | Symbol | Min | Typ | Max | Unit |
Operating bandwidth(-3dB) | S21 | 10 | 12 | GHz | |
Half-wave voltage @50KHz | VΠ | 2.7 | 3 | V | |
Electrical return loss | S11 | -12 | -10 | dB | |
Input impedance | ZRF | 50 | |||
Electrical interface | SMA(f) |
Limit parameters:
Parameter | Symbol | Unit | Min | Typ | Max |
Input optical power | Pin,Max | dBm | 20 | ||
Input RF power | dBm | 28 | |||
Operating temperature | Top | ℃ | -10 | 60 | |
Storage temperature | Tst | ℃ | -40 | 85 | |
Humidity | RH | % | 5 | 90 |
Ordering Information:
SCQ | PM | 13 | XX | XX | XX |
SCQ series | Modulator type: PM--- Phase modulator | Operating wavelength: 13---1310nm | Operating bandwidth: 10---10G | Input & output fiber: PM/PM | Connector: FA ---FC/APC FP ---FC/PC SP---user specified |
PORT | Symbol | Note |
In | Optical input port | PM Fiber (125μm/250μm) |
Out | Optical output port | PM and SM Fiber option |
RF | RF input port | SMA(f) |
Bias | Bias control port | 1,2 Bias, 34-N/C |
3.1 SCQ-RF Series Drivers
SCQ-RF broadband RF amplifier (or called as driver) is a desktop instrument specially designed for high-speed lithium niobate electro-optic modulator. This instrument can amplify the small high-speed signal level to the higher level that can drive the modulator, thus driving the lithium niobate (LiNbO3) electro-optic modulator to work, and has good gain flatness in the broadband range.
Features:
High bandwidth: 10, 20 or 40 GHz
Variable gain
The output range is up to 8V
Highly integrated
Easy to use
Applications:
10/20/40G optical modulating system
Fiber optic testing system
Optical fiber sensing system
Parameters of SCQ-RF-40 Driver
Parameter | Unit | Min | Typ | Max |
Transmission rate | Gb/s | 0.0001 | 44 | |
Operating frequency range | Hz | 50K | 40G | |
Output voltage magnitude | V | 7 | 8 | 9 |
Gain margin | V | 0.3 | 0.4 | 0.6 |
Regulation precision | dB | 24 | 27 | 35 |
Output power P1dB | V | 0.1 | ||
Gain variation(ripple) | dBm | 20 | ||
Rise/fall time | dB | ±1.5 | ||
Additional jitter | ps | 8 | 12 | |
Input/output impedance | ps | 0.42 | ||
Input voltage amplitude | | - | 50 | - |
Input voltage standing-wave ratio VSWR (75k to 10GHz) | 1.6:1 | 2.25:1 | ||
Output voltage standing-wave ratio VSWR | 2:1 | 3:1 | ||
Boundary dimension(L x W x H) | mm | 270 x 200 x 70 | ||
Operating voltage | V | AC 220 | ||
RF interface | V(f)-V(f) |
Limit Conditions
Parameter | Unit | Min | Typ | Max |
Input voltage amplitude | V | 1 | ||
Working temperature | ºC | -10 | 60 | |
Storage e temperature | ºC | -40 | 85 | |
Humidity | % | 5 | 90 |
Eye Diagram
Ordering Information:
SCQ | RF | XX | XX | X |
SCQ series drivers | RF amplifier | Operating rate: 10---10Gbps 20---20Gbps 40---40Gbps | Output characteristic: Blank---Standard HO---High voltage output RZ---RZ signal amplification | Footprint: D---Table model |
3.2 MZM Bias Controller
The bias controller is specially designed for Mach-Zehnder modulators to ensure a stable operation state in various operating environments. Based on its fully digitized signal processing method, the controller can provide highly stable performance. The controller injects a low frequency, low amplitude dither signal together with bias voltage into the modulator. It keeps reading the output from the modulator and determines the condition of the bias voltage and the related error. A new bias voltage will be applied afterwards according to the previous measurement. In this way, the modulator is ensured to work under proper bias voltage.
Features:
Bias voltage control on Peak/Null/Q+/Q−
Bias voltage control on arbitrary point
Ultra precise control: (1) 50dB maximum extinction ratio on Null mode; (2) ±0.5◦ accuracy on Q+ and Q− modes
Low dither amplitude: (1) 0.1% Vπ at NULL mode and PEAK mode; (2) 2% Vπ at Q+ mode and Q− mode
High stability: with fully digital implementation
Low profile: 40mm(W) × 30mm(D) × 10mm(H)
Easy to use: (1) Manual operation with mini jumper; (2) Flexible OEM operations through MCU UART2
Two different modes to provide bias voltage: (1) Automatic bias control; (2) User defined bias voltage
Application:
LiNbO3 and other MZ modulators
Digital NRZ, RZ
Pulse applications
Brillouin scattering system and other optical sensors
CATV Transmitter
Ordering Information
Part No.: SCQ-RF-BC
Remark: (1) The highest extinction ratio depends on and cannot exceed modulator maximum extinction ratio. (2) UART operation is only available on some version of the controller.
Performance:
Maxim DC Extinction Ratio:
In this experiment, no RF signals were applied to the system. Pure DC extinction has been measured.
(1) Figure 3 demonstrates the optical power of modulator output, when modulator controlled at Peak point. It shows 3.71dBm in the diagram.
(2) Figure 4 shows the optical power of modulator output, when modulator controlled at Null point. It shows -46.73dBm in the diagram. In real experiment, the value varies around -47dBm; and -46.73 is a stable value.
(3) Therefore, the stable DC extinction ratio measured is 50.4dB.
Requirements for High Extinction Ratio:
(1) System modulator must have high extinction ratio. Characteristic of system modulator decides the maximum extinction ratio can be achieved.
(2) Polarization of modulator input light shall be taken care of. Modulators are sensitive to polarization. Proper polarization can improve extinction ratio over 10dB. In lab experiments, usually a polarization controller is needed.
(3) Proper bias controllers. In our DC extinction ratio experiment, 50.4dB extinction ratio has been achieved. While the datasheet of the modulator manufacture only lists 40dB. The reason of this improvement is that some modulators drift very fast. Our SCQ-RF-BC-ANY bias controllers update the bias voltage every 1 second to ensure fast track response.
Specifications:
Parameter | Min | Typ | Max | Unit | Conditions |
Control Performance | |||||
Extinction ratio | MER 1 | 50 | dB | ||
CSO2 | −55 | −65 | −70 | dBc | Dither amplitude: 2%Vπ |
Stablization time | 4 | s | Tracking points: Null & Peak | ||
Stablization time | 10 | s | Tracking points: Q+ & Q- | ||
Electrical | |||||
Positive power voltage | +14.5 | +15 | +15.5 | V | |
Positive power current | 20 | 30 | mA | ||
Negative power voltage | -15.5 | -15 | -14.5 | V | |
Negative power current | 2 | 4 | mA | ||
Output voltage range | -9.57 | +9.85 | V | ||
Output voltage precision | 346 | µV | |||
Dither frequency | 999.95 | 1000 | 1000.05 | Hz | Version: 1kHz dither signal |
Dither amplitude | 0.1%Vπ | V | Tracking points: Null & Peak | ||
Dither amplitude | 2%Vπ | V | Tracking points: Q+ & Q- | ||
Input optical power3 | -30 | -5 | dBm | ||
Input wavelength | 780 | 2000 | nm |
1 MER refers to Modulator Extinction Ratio. The extinction ratio achieved is typically the extinction ratio of modulator specified in modulator datasheet.
2 CSO refers to composite second order. To measure CSO correctly, the linear quality of RF signal, modulators and receivers shall be
ensured. In addition, the system CSO readings may vary when running at different RF frequencies.
3 Please be noted that input optical power does not correspond to the optical power at selected bias point. It refers to the maximum optical power that the modulator can export to controller when bias voltage ranges from −Vπ to +Vπ .
Group | Operation | Explanation |
Photodiode1 | PD: Connect MZM photodiode’s Cathode | Provide photocurrent feedback |
GND: Connect MZM photodiode’s Anode | ||
Power | Power source for bias controller | V-: connects the negative electrode |
V+: connects the positive electrode | ||
Middle probe: connects the ground electrode | ||
Reset | Insert jumper and pull out after 1 second | Reset the controller |
Mode Select | Insert or pull out the jumper | no jumper: Null mode; with jumper: Quad mode |
Polar Select2 | Insert or pull out the jumper | no jumper: Positive Polar; with jumper: Negative Polar |
Bias Voltage | Connect with the MZM bias voltage port | OUT and GND provide bias voltages for modulator |
LED | Constantly on | Working under stable state |
On-off or off-on every 0.2s | Processing data and searching for controlling point | |
On-off or off-on every 1s | Input optical power is too weak | |
On-off or off-on every 3s | Input optical power is too strong | |
UART | Operate controller via UART | 3.3: 3.3V reference voltage |
GND: Ground | ||
RX: Receive of controller | ||
TX: Transmit of controller | ||
Control Select | Insert or pull out the jumper | no jumper: jumper control; with jumper: UART control |
1 Some MZ modulators have internal photodiodes. Controller setup should be chosen between using controller’s photodiode or using modulator’s internal photodiode. It is recommended to use controller’s photodiode for lab experiments for two reasons. Firstly, controller photodiode has ensured quality. Secondly, it is easier to adjust the input light intensity. Note: If using modulator’s internal photodiode, please make sure that the output current of photodiode is strictly proportional to input power.
2 Polar pin is used to switch the control point between Peak and Null in Null control mode(determined by Mode Select pin) or Quad+ and Quad- in Quad control mode. If jumper of polar pin is not inserted, the control point will be Null in Null mode or Quad+ in Quad mode. Amplitude of RF system will also affect the control point. When there is no RF signal or RF signal amplitude is small, controller is able to lock the work point to correct point as selected by MS and PLR jumper. When the RF signal amplitude exceeds certain threshold, polar of the system will be changed, in this case, the PLR header should be in the opposite state, i.e. the jumper should be inserted if it is not or pulled out if it is inserted.
Typical Application:
The controller is easy to use as follows:
Step1. Connect 1% port of the coupler to the photodiode of the controller.
Step2. Connect bias voltage output of the controller (through SMA or 2.54mm 2-pin header) to bias port of the modulator.
Step3. Provide controller with +15V and -15V DC voltages.
Step4. Reset the controller and it will start to work.
NOTE. Please be ensured that RF signal of the whole system is on before resetting the controller.
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