40Gbps DQPSK Integrated Receiver, Fujitsu FIM24202, Fiber Coupled Module
The Fujitsu FIM24202 DQPSK receiver integrates balanced PIN/TIA (Linear + AGC) photo receiver and DLI (Delay Line Interferometer) in one package, which make the module compact and cost-effective with excellent performances. The interior PLC Mach-Zehnder interferometer features push/pull drive of DLI phase tuning for lower power consumption. And the Balanced receiver consist of PIN, TIA and peak detector for each channel, which is easy for tuning and debugging. All the components are hermetically sealed in high reliable package. It is designed for 40Gbps DQPSK optical communication systems.
Features
- 3dB cut-off frequency: 20 GHz typ.
- Power consumption <3.5W target
- Small Size: 45mm x 27mm x 8.0mm max.
- Flexible Printed Cable (FPC) interface
- Optical Input power monitor
Applications
- 44.6Gbit/s DQPSK optical communication systems
- MSA Transponder and Line card designs
Block Diagram
Optical Characteristics
| Parameter | Units | Min | Typ. | Max | Notes |
| Wavelength Range | nm | 1527 | 1565 | ||
| Optical Input Power | dBm | 4.5 | 10.5 | ||
| Extinction Ratio | dB | 17 | |||
| Optical Path Delay(P/N) | ps | -2 | – | +2 | Differential Output Same Arm |
| Optical Path Delay(I/Q) | ps | -3 | – | +3 | Between I –arm and Q-arm |
| FSR | GHz | – | 22.8 | – | |
| FSR Error | GHz | – | ±1 | ||
| Phase Tuning Range | FSR | -1 | – | +1 | |
| Phase Tuning Voltage | V | – | 6.5 | 8.0 | MZI_I1±, MZI_Q1± MZI_I2±, MZI_Q2± |
| Phase Tuning Resistance | Ohms | – | 60 | – | |
| Phase Tuning Time Constant* | mSec | – | 50 | – | |
| Optical Return Loss | dB | 27 | – | – |
Electrical Characteristics
| Parameter | Units | Min | Typ. | Max | Motes |
| PD Responsivity** | A/W | 0.075 | 0.15 | Receiver Total | |
| A/W | 0.01 | – | 0.1 | Monitor PD | |
| Bit Rate | Gbps | – | 44.6 | – | |
| Conversion Gain | Vpp/W | – | 150 | – | Not AGC Mode |
| Electrical Output Reflection Coefficient (S22) | dB | – | 10 | – | @<20GHz |
| Input Referred Noise Current Density | pA/sqrt(Hz) | – | 15 | – | @TIA |
| Photodiode Dark Current | uA | – | 3 | – | |
| Power Consumption | W | 2.0 | – | 3.5 | In Total |
| Thermistor Resistance | Kohms | – | 10 | – | |
| Thermistor B Constant | K | – | 3410 | – | |
| Output Voltage Swing | mVpp | – | 400 | – | AGC Mode, Terminate to GND through 50 Ohms |
| 3dB Cut-off Frequency | GHz | – | 20 | – | |
| Amplifier Supply Current | mA | – | 110 | 135 | In Total |
| Thermistor Current | mA | – | 0125 | – | |
| TEC Resistance | Ohm | – | 3.75 | – | |
| TEC Control Time Constant | Sec | – | 13 | – |
