25G/40G Linear InGaAs Optical Receiver for 850nm-1550nm with CDR
|
The DSC-R409 is a linear and versatile PIN + transimpedance amplifier suited for a variety of digital and analog applications. The R409 offers a linear response to > 0dBm optical input, +4dBm of optical overload at 40Gb/s, 30GHz of RF bandwidth and a conversion gain of 300 V/W. Its linearity and well-controlled frequency response results in excellent system-level performance for both digital and analog applications.The R409 is available as a fiber optic module with differential GPPO RF outputs or as a Lab Buddy instrument, both of which utilize Discovery's high reliability InGaAs photodiode technology.
The R409 Lab Buddy is also available with an option 25-28 Gb/s clock and data recovery (CDR) unit. The unit conveniently interfaces with the bit error rate (BER) test stations and provide a 3R (Receive, Reshape & Retime) solution, which is especially important for transmission experiments. The CDR also incorporates a programmable input equalization filter that can be adjusted for optimum link performance using an included GUI control program.
Fig1: Typical PAM4 Eye Diagram
Fig2: Typical BER Curve: 0 km vs. 2 km SMF:
{39.8 Gb/s, 231-1 PRBS, 12dB Ext. Ratio, 1550nm, direct connection to CDR}
Salient Features:
- Linear gain to > 0 dBm optical input
- Overload of +4 dBm at a BER of 10-12
- Sensitivity of -9.5 dBm at a BER of 10-12
- High Responsivity at 1310nm, 1550nm & L-band
- Low optical PDL @ 1550nm (typically 0.05dB)
- Differential or single-ended RF outputs
- +5V operation for both PD & TIA (optional +3.3V operation; please contact factory)
- 850nm and multimode fibered (MMF) versions including CDR are available
- Meets GR-468 reliability standard
Applications:
- 40Gb/s SONET/SDH OC-768/STM-256 short reach
- 40 Gb/s D(Q)PSK systems
- 100 Gb/s long-haul coherent systems
- 4-level Pulse Amplitude Modulation (PAM4)
- Analog RF links over fiber
- Antenna remoting
- Cellular and PCS network links to picocells
- Military communications
- Active Optical Cables for Fiber Channel and Infiniband
Fig3: Frequency Response Curve
Available Models:
- DSC-R409 - 40 Gb/s Linear PIN + TIA Optical Receiver
- DSC-R409 - 25 Gbaud Linear PIN + TIA + CDR Optical Receiver
- A New, Simpler Path to 100G/400G Short Reach Applications
- Discovery Semiconductors adds Gennum Corporation's 25G CDR to its 25Gbaud Lab Buddy Product Line
- Paper by JDSU: 2 km SMF 400 Gb/s live traffic results using DMT test chips and Discovery Semiconductor's Differential, Linear Optical Receiver (DSC-R409).
