----KY-IQ-15-20G-PP-FA
Features
lLow insertion loss.
lLow half-wave voltage
lHigh extinction ratio
lBuilt-in detector
Application
lSingle Side Band modulation.
lQPSK, QAM, OFDM modulation
lFWCW LiDAR
Introduction
KY-IQ-15-20G-PP-FA is a wideband, low insertion loss dual parallel Mach Zehnder interference modulator, which is prepared by Titanium diffusion process, with high bandwidth and low driving voltage.
The dual parallel IQ modulator integrates two sub-MZs and an external master MZ with essentially the same structure and performance, as shown in Figure 1. It contains two RF signal input ports of I and Q channels, and three bias voltage ports of MZ structure, which has a high integration, stable working performance, so can independently realize single-sideband modulation and QAM modulation methods such as carrier suppression.
The operating wavelength of the dual parallel IQ modulator is C+L band, 3dB bandwidth can up to 25GHz. It uses 2.92mm female connector, input and output are Panda type polarization maintaining fiber, and optical fiber connector can choose FC/APC or FC/PC. It has two built-in monitoring PDs and the corresponding bias point control circuit, to realize the modulator is not affected by the external environment and works stably for long time.
It mainly used in QAM and other high-speed optical fiber communication and distributed optical fiber sensing and other fields. For the application environment, our company can provide industrial grade -40~70 °C, military grade -55~70 °C and anti-irradiation aerospace grade products.
Parameters
Parameters | Symbol | Min. | Typ. | Max. | Unit |
Wavelength | λ | 1530 | 1550 | 1610 | nm |
Crystal |
| Lithium Niobate X-Cut Y-Prop |
|
Insertion loss | IL |
| 5 | 6.5 | dB |
Extinction ratio@DC | ER | 20 | 23 |
| dB |
3dB Bandwidth | BW | 20 | 25 |
| GHz |
Electrical Return loss | S11 |
| -12 | -10 | dB |
DC half-wave voltage | VπDC1.2 |
| 6 | 7 | V |
VπDC3 |
| 7 | 8 | V |
RF half-wave voltage | VπRF@50KHz |
| 5 | 6 | V |
Impedance | ZRF |
| 50 |
| Ω |
Optical Return loss | ORL | 40 | 45 |
| dB |
Polarization Extinction Ratio | PER | 20 | 23 |
| dB |
Absolute Maximum Ratings
Parameters | Symbol | Unit | Min. | Typ. | Max. |
RF input power | RPi | dBm |
|
| 27 |
Optical input power | OPi | dBm |
|
| 20 |
Bias voltage | Vb | V | -15 |
| 15 |
Operating temperature* | Top | ºC | -10 |
| 70 |
Storage temperature | Tst | ºC | -40 |
| 85 |
Humidity | RH | % | 5 |
| 90 |
Typical curve
Dimensions（unit: mm）
Pin definition |
PIN | Function | Note |
IN | Optical input | Panda PM fiber (slow axis), FC/APC |
OUT | Optical output | Panda PM fiber (slow axis) or SM fiber, FC/APC |
RF1,2 | RF1/2 input | 2.92 female K |
1 | Ground | GND |
2,3,4 | DC₁, DC₂, DC₃+ | DC bias |
5,6 | PD1 -/+ | PD1 Cathode/Anode |
7,8 | PD2 -/+ | PD2 Cathode/Anode |