Coherent Receiver with up to 60 GHz Bandwidth
The CORX – Coherent Optical IQ Receiver is a fully integrated, high-performance reception module for coherent optical signals in the C-band. With bandwidths up to 60 GHz and a built-in tunable laser, it is ideal for analyzing complex modulation formats and the highest symbol rates.
At a Glance
- Dual-polarization coherent receiver
- 20 GHz, 40 GHz, and 60 GHz bandwidth options
- Integrated tunable C-band laser
- Built-in transimpedance amplifiers with gain and peaking control
- 4 single-ended RF outputs
- Control via integrated web server (no software installation required)
- SCPI command interface (USB/Ethernet)
- 1U 19” rack-mountable chassis
Features
- Optimized for High Symbol Rates: With its high bandwidth and optimized channel matching, the CORX enables analysis of dual-polarization multi-level signals with symbol rates exceeding 120 GBaud.
- Integrated Tunable Laser: The internal laser covers the C-band (1528–1568 nm) with linewidth < 100 kHz, typical SMSR > 50 dB, and precise frequency tuning (1 MHz resolution, ±6 GHz fine tuning).
- Adaptive RF Gain: Each of the four channels features software-controlled gain and peaking adjustment to compensate for fading or RF chain imperfections.
- Easy to Use: The system is controlled via a built-in, browser-based web interface – no installation required. A SCPI interface is also available for automated scripting and remote control.
Applications
- Front-end for real-time oscilloscopes
- Testing and analysis of coherent modulation formats (e.g., QPSK, 16-QAM, 64-QAM)
- Reference receiver for transmitter characterization
- DWDM system tests and transmission experiments
- Development and validation of coherent DSP algorithms
Specifications
| Specification | Parameter |
|---|---|
| Wavelength range | 1528 – 1568 nm |
| Frequency range (C-band) | 190.70 – 196.65 THz |
| Bandwidth options (6 dB E/O) | 20 GHz, 40 GHz, 60 GHz (typical: 25 / 40 / 60 GHz) |
| RF output signal | 600 mVpp (single-ended, 4 channels) |
| RF connectors | 1.85 mm, female, 50 Ohm |
| IQ skew | ±3 ps |
| XY skew | ±5 ps |
| Polarization extinction ratio | > 17 dB |
| Phase angle error | ±5° |
| Responsivity | 0.035 A/W |
| VOA attenuation range | 10 dB |
| Input power range (optical) | Signal: 0 dBm, LO: up to 16 dBm |
| Max. optical input power | 20 dBm (combined signal + LO) |
| Optical connector | FC/APC |
| Fiber type (signal input) | Polarization-maintaining PANDA fiber, PER > 20 dB (typ. 25 dB) |
| Operating temperature | +10 °C to +35 °C (non-condensing) |
| Dimensions (W × H × D) | 365 × 45 × 275 mm |
| Weight | 3 kg |