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Service Hotline：
(+86)010-52867771
Instrument Expert
Original factory packaging
Service Hotline：
(+86)010-52867771
Updated:2023-07-31
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Ultra High-Speed Operation
Rise Times: starting from 15 ps
Bandwidths: up to 25 GHz
Spectral Ranges: 170 - 2600 nm (UV to IR)
Compact Design
Battery or External Power Supply
Models for Free-Space Beam, or with FC/PC Receptacle or Pigtailed with SM Fiber
Pulse Form Measurements
Pulse Duration Measurements
Precise Synchronization
Mode Beating Monitoring
Heterodyne Measurements
The UPD series of ultrafast photodetectors are best suited for measurement of optical waveforms from DC to 25 GHz. Various models feature rise times as short as 15 ps and cover the spectral range from 170 to 2600 nm.
All photodiodes are enclosed in compact and solid aluminum housings and can be biased with a battery or an external power supply.
The UV-extended versions of the silicon type photodetectors are the only commercial products that cover the spectral range from 170 to 1100 nm.
Another type of unique UV-sensitive InGaAs photodetectors can be used for detecting laser pulses in the range from 350 to 1700 nm, thus having the widest spectral range and the highest speed commercially available.
Perfect impedance matching and state-of-the-art microwave technology assure pulse form measurements without any ringing or artefacts. The customer is free to use a 50 Ω terminating resistor for highest speed operation, or a high impedance load for obtaining large signals. This guarantees maximum flexibility for diverse applications.
In combination with our BBA series of wideband high-gain amplifiers, the high-speed photodetectors are an advantageous alternative to the expensive and cumbersome avalanche photodiodes.
The UPD series high-speed photodetectors are indispensable tools for laser and photonics research.
UPD-15-IR2-FC: Ultrafast InGaAs PIN photodetector, rise time < 15 ps, bandwidth> 25 GHz, spectral range 800 - 1700 nm, fiber-coupled input with FC/APC connector
UPD-35-IR2-P, UPD-35-IR2-D: Ultrafast InGaAs PIN photodetectors, rise time < 35 ps, bandwidth> 10 GHz, spectral range 800 - 1700 nm, with polished or diffuse window
UPD-35-UVIR-P, UPD-35-UVIR-D: Ultrafast InGaAs PIN photodetectors, rise time < 35 ps, bandwidth> 10 GHz, spectral range 350 - 1700 nm, with polished or diffuse window
UPD-50-SP, UPD-50-SD, UPD-50-UD, UPD-50-UP: Ultrafast Si PIN photodetector, rise time 50 ps, fall time 50 ps, bandwidth > 7 GHz, spectral range 170 - 1100 nm or 320 - 1100 nm, with polished or diffuse window
UPD-100-IR1-P: Ultrafast Ge photodetector, rise time < 100 ps, pulsewidth (FWHM) 300 ps, spectral range 400 - 2000 nm
UPD-3N-IR2-P: Fast InGaAs photodetector, extended infrared range up to 2.1 µm, rise time 150 ps
UPD-5N-IR2-P: Fast InGaAs photodetector, extended infrared range up to 2.6 µm, rise time 200 ps
| Photodetector Model |
Rise Time (ps) |
Band- width (GHz) |
Spectral Range (nm) |
Quantum Efficiency @ Peak |
Sensitive Area (Dia. µm/mm2) |
Noise Equiv. Power (W/√Hz) |
Dark Current (nA) |
Material | Optical Input / Window Type 1) |
RF Output Connec- tor |
| UPD-15-IR2-FC | < 15 | > 25 | 800 - 1700 | 75% | Fiber, 9 µm | 1.0 × 10-15 | 0.1 | InGaAs | Fiber w. FC/APC 5) | SMA |
| UPD-30-VSG-P | < 30 | > 10 | 320 - 900 | 40% | 200x200/0.04 | 3.0 × 10-15 | 0.1 | GaAs | Polished, glass | SMA |
| UPD-35-IR2-P | < 35 | > 10 | 800 - 1700 | 80% | 55/0.0024 | 1.0 × 10-15 | 0.3 | InGaAs | Polished, glass | SMA |
| UPD-35-IR2-D | < 35 | > 10 | 800 - 1700 | 80% | 55/0.0024 | 1.0 × 10-15 | 0.3 | InGaAs | Diffuse, quartz | SMA |
| UPD-35-IR2-FR | < 35 | > 10 | 800 - 1700 | 80% | 55/0.0024 | 1.0 × 10-15 | 0.3 | InGaAs | FC/PC receptacle 5) | SMA |
| UPD-35-IR2-FC | < 35 | > 10 | 800 - 1700 | 80% | Fiber, 9 µm | 1.0 × 10-15 | 0.3 | InGaAs | Fiber w. FC/APC 5) | SMA |
| UPD-35-UVIR-P | < 35 | > 10 | 350 - 1700 | 80% | 55/0.0024 | 1.0 × 10-15 | 0.3 | InGaAs 4) | Polished, MgF2 | SMA |
| UPD-35-UVIR-D | < 35 | > 10 | 350 - 1700 | 80% | 55/0.0024 | 1.0 × 10-15 | 0.3 | InGaAs 4) | Diffuse, quartz | SMA |
| UPD-40-VSI-P | < 40 | > 8.5 | 500 - 1690 | 40% | 200x200/0.04 | 3.0 × 10-10 | 5000 | InGaAs | Polished, glass | SMA |
| UPD-40-IR2-P | < 40 | > 8.5 | 800 - 1700 | 80% | 60/0.0028 | 1.1 × 10-15 | 0.5 | InGaAs | Polished, glass | SMA |
| UPD-40-IR2-D | < 40 | > 8.5 | 800 - 1700 | 80% | 60/0.0028 | 1.1 × 10-15 | 0.5 | InGaAs | Diffuse, quartz | SMA |
| UPD-40-IR2-FR | < 40 | > 8.5 | 800 - 1700 | 80% | 60/0.0028 | 1.1 × 10-15 | 0.5 | InGaAs | FC/PC receptacle 5) | SMA |
| UPD-40-IR2-FC | < 40 | > 8.5 | 800 - 1700 | 80% | Fiber, 9 µm | 1.1 × 10-15 | 0.5 | InGaAs | Fiber w. FC/APC 5) | SMA |
| UPD-40-UVIR-P | < 40 | > 8.5 | 350 - 1700 | 80% | 60/0.0028 | 1.1 × 10-15 | 0.5 | InGaAs 4) | Polished, MgF2 | SMA |
| UPD-40-UVIR-D | < 40 | > 8.5 | 350 - 1700 | 80% | 60/0.0028 | 1.1 × 10-15 | 0.5 | InGaAs 4) | Diffuse, quartz | SMA |
| UPD-50-SP | < 50 | > 7.0 | 320 - 1100 | 45% | 100/0.0079 | 1.2 × 10-15 | 0.001 | Si | Polished, glass | SMA |
| UPD-50-SD | < 50 | > 7.0 | 320 - 1100 | 45% | 100/0.0079 | 1.2 × 10-15 | 0.001 | Si | Diffuse, quartz | SMA |
| UPD-50-UP | < 50 | > 7.0 | 170 - 1100 | 45% | 100/0.0079 | 1.2 × 10-15 | 0.001 | Si 4) | Polished, MgF2 | SMA |
| UPD-50-UD | < 50 | > 7.0 | 170 - 1100 | 45% | 100/0.0079 | 1.2 × 10-15 | 0.001 | Si 4) | Diffuse, quartz | SMA |
| UPD-70-IR2-P | < 70 | > 5.0 | 800 - 1700 | 80% | 80/0.005 | 2.0 × 10-15 | 0.8 | InGaAs | Polished, glass | SMA |
| UPD-70-IR2-D | < 70 | > 5.0 | 800 - 1700 | 80% | 80/0.005 | 2.0 × 10-15 | 0.8 | InGaAs | Diffuse, quartz | SMA |
| UPD-70-IR2-FR | < 70 | > 5.0 | 800 - 1700 | 80% | 80/0.005 | 2.0 × 10-15 | 0.8 | InGaAs | FC/PC receptacle 5) | SMA |
| UPD-70-IR2-FC | < 70 | > 5.0 | 800 - 1700 | 80% | Fiber, 9 µm | 2.0 × 10-15 | 0.8 | InGaAs | Fiber w. FC/APC 5) | SMA |
| UPD-70-UVIR-P | < 70 | > 5.0 | 350 - 1700 | 80% | 80/0.005 | 2.0 × 10-15 | 0.8 | InGaAs 4) | Polished, MgF2 | SMA |
| UPD-70-UVIR-D | < 70 | > 5.0 | 350 - 1700 | 80% | 80/0.005 | 2.0 × 10-15 | 0.8 | InGaAs 4) | Diffuse, quartz | SMA |
| UPD-100-IR1-P | < 100 | > 3.0 | 400 - 2000 | 80% | 80/0.005 | 3.0 × 10-13 | 700 | Ge | Polished, glass | SMA |
| UPD-200-SP | < 175 | > 2.0 | 320 - 1100 | 85% | 400/0.126 | 1.5 × 10-15 | 0.001 | Si | Polished, glass | BNC |
| UPD-200-SD | < 175 | > 2.0 | 320 - 1100 | 85% | 400/0.126 | 1.5 × 10-15 | 0.001 | Si | Diffuse, quartz | BNC |
| UPD-200-UP | < 175 | > 2.0 | 170 - 1100 | 85% | 400/0.126 | 1.5 × 10-15 | 0.001 | Si 4) | Polished, MgF2 | BNC |
| UPD-200-UD | < 175 | > 2.0 | 170 - 1100 | 85% | 400/0.126 | 1.5 × 10-15 | 0.001 | Si 4) | Diffuse, quartz | BNC |
| UPD-300-SP | < 300 | > 1.0 | 320 - 1100 | 90% | 600/0.283 | 3.0 × 10-15 | 0.01 | Si | Polished, glass | BNC |
| UPD-300-SD | < 300 | > 1.0 | 320 - 1100 | 90% | 600/0.283 | 3.0 × 10-15 | 0.01 | Si | Diffuse, quartz | BNC |
| UPD-300-UP | < 300 | > 1.0 | 170 - 1100 | 90% | 600/0.283 | 3.0 × 10-15 | 0.01 | Si 4) | Polished, MgF2 | BNC |
| UPD-300-UD | < 300 | > 1.0 | 170 - 1100 | 90% | 600/0.283 | 3.0 × 10-15 | 0.01 | Si 4) | Diffuse, quartz | BNC |
| UPD-500-SP | < 500 | > 0.6 | 320 - 1100 | 90% | 800/0.5 | 3.5 × 10-15 | 0.01 | Si | Polished, glass | BNC |
| UPD-500-SD | < 500 | > 0.6 | 320 - 1100 | 90% | 800/0.5 | 3.5 × 10-15 | 0.01 | Si | Diffuse, quartz | BNC |
| UPD-500-UP | < 500 | > 0.6 | 170 - 1100 | 90% | 800/0.5 | 3.5 × 10-15 | 0.01 | Si 4) | Polished, MgF2 | BNC |
| UPD-500-UD | < 500 | > 0.6 | 170 - 1100 | 90% | 800/0.5 | 3.5 × 10-15 | 0.01 | Si 4) | Diffuse, quartz | BNC |
| UPD-3N-IR2-P | < 150 6) | > 0.4 6) | 800 - 2100 | 75% | 300/0.07 | 1.5 × 10-13 | 90 | InGaAs | Polished, glass | BNC |
| UPD-5N-IR2-P | < 200 6) | > 0.3 6) | 800 - 2600 | 70% | 300/0.07 | 7.0 × 10-13 | 2000 | InGaAs | Polished, glass | BNC |
| UPD-2M-IR2-P | < 75000 | > 0.004 | 900 - 1700 | 80% | 2000/3.14 | 4.0 × 10-14 | 5 | InGaAs | Polished, glass | BNC |
| UPD-2M-IR2-P-1TEC 3) | < 75000 | > 0.004 | 900 - 1700 | 75% | 2000/3.14 | 1.0 × 10-14 | 0.3 | InGaAs | Polished, glass | BNC |
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