Electro-optic Modulators

Electro-optic Modulators

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

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
Parameters Symbol STK-KY-AM-08 STK-KY-AM-10 STK-KY-AM-15-10G STK-KY-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
5V 4.5V 4V 5V
Half wave voltage @Bias 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 -10~60C
Storage temperature Tst -40~80C
RF input power Pi <28dBm
Max. input optical power Po 30mW 50mW 100mW 100mW

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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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

Absolute Maximum Ratings

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

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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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

Absolute Maximum Ratings

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

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

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 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

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
Parameters Symbol STK-KY-PM830-1 STK-KY-PM1064-1 STK-KY-PM1550-1 STK-KY-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 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 -10~60C
Storage temperature Tst -40~80C
RF input power Pi <28dBm
Maximum input
optical power
Po 30mW 100mW 100mW 100mW

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
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

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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.

Parameters Symbol Unit STK-KY-MD-10G STK-KY-MD-10G-HO STK-KY-MD-20G STK-KY-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

Absolute Maximum Ratings

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

Characteristic Curve

electro-optic modulator eom

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Typical Application

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4. STM Series Electro-optic Modulators

E-O modulators and modulation systems are used for pulse selection, regen-switching, video disk mastering and data recording. Products include E-O phase modulators, beam deflectors, associated drivers, transverse field modulators, laser noise-reduction systems, and optical isolators. We also manufacture, on a custom basis, intensity modulation systems with high frequency capabilities beyond 400MHz.

Most modulators are transverse field type Pockels Cells. In the original Pockels Cell design the optical beam is longitudinal to the electric field. In the new transverse design the optical beam is orthogonal to the electric field. The advantage of the transverse design is that it requires approximately 100 volts as opposed to the kilovolts required by the original design.

electro-optic modulator

Features

  • 2 or 4 crystal configurations
  • Designed to minimize the natural net birefringence
  • Require DC offset voltage to set the quiescent operating point
  • Supplied with an output polarizer, pre-aligned to the crystal axes
  • Require either that the input laser is polarized or use of an auxiliary polarizer at the input
  • Filled with index matching fluid < /li> Note: Window assemblies should not be removed

Configurations

ADP Crystal Series Wavelength Limits (240 to 800 nm)*

Model Number V ½ wave @ 500nm V ½ wave @ 830nm Aperture Diameter Resonances Contrast Ratio @ 633nm Length w/ Polarizer
STM370 184 306 2.5mm No 500:1 158mm
STM370 LA 263 437 3.5mm No 500:1 158mm
STM380 92 153 2.5mm No 500:1 253mm
STM390 115 190 3.5mm No 500:1 272mm

KD*P Crystal Series Wavelength Limits (240 to 1100nm)*

Model Number V ½ wave @ 500nm V ½ wave @ 830nm V ½ wave @ 1064nm Aperture Diameter Resonances Contrast Ratio @ 633nm & 1064nm Length w/ Polarizer
STM350-50 455 757 970 3.1mm Yes 500:1,700:1 106mm
STM350-80 261 433 522 2.7mm Yes 500:1,700:1 137mm
STM350-80LA 360 600 720 3.5mm Yes 500:1,700:1 137mm
STM350-105 226 376 472 3.1mm Yes 500:1,700:1 162mm
STM350-160 130 216 275 2.7mm yes 300:1,500:1 215mm
STM350-210 113 188 240 3.1mm Yes 300:1,500:1 268mm

LTA Crystal Series Wavelength Limits (700 to 2000nm)

Model Number V ½ wave @ 830nm V ½ wave @ 1064nm V ½ wave @ 2500nm Aperture Diameter Resonances Contrast Ratio @ 1064nm Length w/ Polarizer
STM360-40 213 400 950 2.7mm Yes 200:1 95mm
STM360-80 143 183 430 2.7mm Yes 100:1 137mm
STM360-120 107 138 323 2.7mm Yes 100:1 174mm
STM360-160 71 92 215 2.7mm Yes 100:1 215mm

Amplifier Details

Model Bandwidth Rise/Fall Times Max. Output V Typical Drive Configuration Output
ST25A DC-to-25MHz 14ns 145 100 Ohms B.L. Linear
ST25D DC-to-30MHz 8ns 175 100 Ohms B.L. Digital
ST50 DC-to-50MHz 7ns 90 50 Ohms B.L. Linear
ST100 DC-to-100MHz 3.5ns 90 50 Ohms B.L. Linear
ST200 10Khz-to-200MHz 2ns 170 50 Ohms S.E. --
ST275 DC-to-8MHz 50ns 275 Lumped Capacitance Linear
ST302RM DC-to-250KHz 1 micro-sec 750 Lumped Capacitance Linear
ST302A DC-to-1MHz 350ns 350 Lumped Capacitance Linear
ST307 DC-to-50KHz 8ns 800 Lumped Capacitance Digital
ST505 5MHz-to-100MHz 3.5ns 44 50 Ohms S.E. --
ST550 20MHz-to-500MHz 1.5ns 140 50 Ohms S.E. --