Measurement & Safety
D / DA photodetectors
Laser Pulse Measurement & Fast Photodetectors
Convert a pulsed optical signal into an electrical waveform for an oscilloscope. Choose a biased D-series detector for fast pulse monitoring or a DA-series amplified detector for fixed-gain signal acquisition, with free-space and fibre-adapter options.
How the measurement works
Match the detector spectral response, rise time, bandwidth and sensitive area to the laser. Attenuate the incident light as required, connect the detector output to a suitable oscilloscope and measure waveform, pulse width, repetition rate, period and rise/fall time.
Features
- Removable optical attenuation
- D-series 12 V bias battery
- DA-series fixed-gain amplification and ±12 V linear supply
- 50 Ω load recommended for high-speed D-series detection
- BNC cable and SM1-SMA / SM1-FC adapters available
Applications
- Pulse-width and repetition-rate measurements
- Pulse-shape and rise/fall-time monitoring
- Optical timing and synchronisation
Technical specifications
Detector selection
| Model | Wavelength range | Rise time | Bandwidth |
|---|---|---|---|
| 200-1100 nm | 1 ns | 350 MHz | |
| 320-1100 nm | 35 ns | 10 MHz | |
| 800-1700 nm | 350 ps | 1 GHz | |
| 320-1100 nm | 35 ns | DC-11 MHz | |
| 350-1100 nm | 10 ns | DC-12 MHz |
Supply and accessories
| Parameter | Specification |
|---|---|
| DA supply | Regulated ±12 V DC; ground, +12 V and -12 V connections; LED switch indicator |
| DA load | Built-in 50 Ω load impedance |
| D bias | Built-in 12 V bias battery |
| Accessories | 50 Ω load, BNC cable, SM1-SMA and SM1-FC fibre adapters |
Configure your measurement
Include these details with your enquiry so we can match the instrument and accessories.
- Laser wavelength, pulse duration, energy and repetition rate
- Beam size, incident power and attenuation
- Oscilloscope bandwidth, termination and input range