UPD Series

Brand：ALPHALAS
Model : UPD Series
UPD series ultrafast photodetectors are ideally suited for measuring optical waveforms from DC to 25 GHz. Various models offer rise times as short as 15 ps and spectral ranges from 170 to 2600 nm.
All photodetectors are packaged in compact solid aluminum housings and can be biased with batteries or an external power supply.
The UV-extended version of Si photodetectors is a commercial product rarely seen on the market, covering the spectral range from 170 to 1100 nm.
Another unique UV-sensitive InGaAs photodetector can detect laser pulses in the 350 to 1700 nm range, offering an extended spectral range with higher speed.
Perfect impedance matching and advanced microwave technology ensure pulse shape measurement without any ringing or artifacts. Customers are free to use a 50 Ω terminator for maximum speed operation or a high-impedance load for large signals. This guarantees maximum flexibility for different applications.
Combined with our BBA series broadband high-gain amplifiers, these high-speed photodetectors are a cost-effective alternative to expensive and bulky avalanche photodiodes (APDs).
The UPD series high-speed photodetectors are indispensable tools for laser and photonics research.
UPD-15-IR2-FC < 15 > 25 800 - 1700 75% Fiber, 9 µm 1.0 × 10-15 0.1 InGaAs Fiber with FC/APC connector ⁵⁾ SMA
UPD-30-VSG-P < 30 > 10 320 - 900 40% 200×200/0.04 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 Diffusive, 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 with FC/APC connector 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⁾ Diffusive, 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 Diffusive, 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 with FC/APC connector 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⁾ Diffusive, 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 Diffusive, 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⁾ Diffusive, 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 Diffusive, 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 with FC/APC connector 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⁾ Diffusive, quartz SMA
UPD-100-IR1-P2） < 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 SMA
UPD-200-SD < 175 > 2.0 320 - 1100 85% 400/0.126 1.5 × 10-15 0.001 Si Diffusive, quartz SMA
UPD-200-UP < 175 > 2.0 170 - 1100 85% 400/0.126 1.5 × 10-15 0.001 Si ⁴⁾ Polished, MgF2 SMA
UPD-200-UD < 175 > 2.0 170 - 1100 85% 400/0.126 1.5 × 10-15 0.001 Si ⁴⁾ Diffusive, quartz SMA
UPD-300-SP < 300 > 1.0 320 - 1100 90% 600/0.283 3.0 × 10-15 0.01 Si Polished, glass SMA
UPD-300-SD < 300 > 1.0 320 - 1100 90% 600/0.283 3.0 × 10-15 0.01 Si Diffusive, quartz SMA
UPD-300-UP < 300 > 1.0 170 - 1100 90% 600/0.283 3.0 × 10-15 0.01 Si ⁴⁾ Polished, MgF2 SMA
UPD-300-UD < 300 > 1.0 170 - 1100 90% 600/0.283 3.0 × 10-15 0.01 Si ⁴⁾ Diffusive, quartz SMA
UPD-500-SP < 500 > 0.6 320 - 1100 90% 800/0.5 3.5 × 10-15 0.01 Si Polished, glass SMA
UPD-500-SD < 500 > 0.6 320 - 1100 90% 800/0.5 3.5 × 10-15 0.01 Si Diffusive, 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⁾ Diffusive, quartz BNC
UPD-3N-IR2-P < 150⁶⁾ > 0.4⁶⁾ 800 - 2100 75% 300/0.07 1.5 × 10-13 90 InGaAs Polished, glass BNC
UPD-5N-IR2-P < 200⁶⁾ > 0.3⁶⁾ 800 - 2600 70% 300/0.07 7.0 × 10-13 2000 InGaAs Polished, glass BNC
UPD-2M-IR2-P < 750000 > 0.004 900 - 1700 80% 2000/3.14 4.0 × 10-14 5 InGaAs Polished, glass BNC
UPD-2M-IR2-P-1TEC ³⁾ < 750000 > 0.004 900 - 1700 75% 2000/3.14 1.0 × 10-14 0.3 InGaAs Polished, glass BNC

Remarks:

① Diffusive window reduces alignment requirements and increases the damage threshold at the expense of approximately three to five times lower sensitivity. Recommended only for high peak power lasers.

② This model has "-" output. By default all other models have "+" output, but "-" output can be ordered if required.

③ With TEC cooling module, non‑standard housing.

④ Modified material with enhanced BLUE/UV sensitivity.

⑤ Not compatible with optional filter holder.

⑥ Performance significantly improved.

• Ultra‑high speed operation;
• Rise time: as short as 15 ps;
• Bandwidth: up to 25 GHz;
• Spectral range: 170‑2600 nm;
• Compact design;
• Battery or external power supply;
• Free‑space beam models, or with FC/PC receptacle or pigtailed with SM fiber;
• Pulse waveform measurement;
• Precise synchronization;
• Pulse duration measurement;
• Mode‑hop monitoring;
• Heterodyne measurement of wavelength range;
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