The Tektronix SD48 is a high-performance optical-to-electrical converter delivering DC to 30 GHz bandwidth across the 950 nm to 1650 nm wavelength range. This plug-in module transforms optical signals into electrical signals for direct analysis on Tektronix sampling oscilloscopes, enabling precise characterization of high-speed optical systems and components.
Technical Specifications
• Bandwidth: DC to 30 GHz
• Wavelength Range: 950 nm to 1650 nm
• Impulse Response: 15 ps (typical)
• Conversion Gain: 19.0 V/mW @ 1310 nm; 19.9 V/mW @ 1550 nm; 15 mV/mW (typ)
• Noise Equivalent Power: 15 pW per Hz
• Maximum Non-Destructive Power: 100 mW peak; 5 mW average
• Aberrations: 20% p-p
• Output Impedance: 50 Ω
• Optical Return Loss: 30 dB
• Operating Temperature Range: 10°C to 40°C
• Internal Fiber Size: 9 μm
– Key Features
• FC/PC optical connector for standard fiber coupling
• 2.92 mm (K connector) electrical output
• 15 ps impulse response enables high-fidelity pulse measurements
• Dual-wavelength conversion gain optimization for 1310 nm and 1550 nm operation
• Low noise equivalent power supports weak optical signal detection
– Typical Applications
• High-speed optical communication testing (SONET/SDH)
• Optical source and device characterization
• Pulse shape analysis
• Relaxation oscillation analysis
• Frequency and time domain analysis of lightwave modulation in fiber-based systems
– Compatibility & Integration
The SD48 integrates as a plug-in module with Tektronix 11800 Series and CSA803 sampling oscilloscopes. Design compatibility extends to SD2x or SD3x electrical sampling heads. Option RR provides reference receiver performance per ITU-T COM15-264E, compatible with the SD-22 electrical sampling head.
