Thorlabs DET08CFC/M-indium gallium arsenide photodetector with four models covering wavelength range of 400-1700 nm, bandwidth from 1 to 5 GHz, rise time from 50 ps to 1 ns, connected to single-mode (SM) or multi-mode (MM) fiber, nFC/PC fiber input connector, nSMA output connector

Thorlabs DET08CFC/M-indium gallium arsenide photodetectorFeatures:
Four models cover the wavelength range of 400-1700 nm
Bandwidth ranging from 1 to 5 GHz
Rise time from 50 ps to 1 ns
Connect to single-mode (SM) or multi-mode (MM) optical fiber
FC/PC fiber optic input connector
SMA output connector
Thorlabs DET08CFC/M-indium gallium arsenide photodetectorProvide a range of fiber coupled, high-speed, high bandwidth detectors that can connect FC/PC single-mode or multi-mode fibers. The overall sensitivity range of these detectors ranges from visible near-infrared (400-1700 nm); Please check the accurate spectral range of each detector in Table 1.2. All detectors on this page have a GHz signal bandwidth, which is as easy to use as our other DET series. These detectors are designed for testing or measurement applications, including data communication, analog microwave, and general high-speed photonics. For free space exploration, Thorlabs provides high-speed free space detectors. We also offer a range of built-in bias photodiodes that are as easy to use as fiber coupled photodetectors, but operate at a slower speed. Our bias photodetector is compatible with both desktop photodiode amplifiers and PMT transimpedance amplifiers.
These fiber coupled detectors are reverse biased and have bias batteries inside, which produce a linear response to incident light. In order to maintain high signal bandwidth, the signal is output through an SMA connector. Thorlabs offers a full range of electronic adapters and cables, including SMA cables and SMA to BNC adapters, for easy monitoring of signals on oscilloscopes or other measuring electronic devices.
Our silicon-based fiber coupled detector is used in the wavelength range of 400 to 1100 nm, with bandwidth options of 1 GHz (# DET02AFC) or 2 GHz (# DET025AFC). For applications extending to near-infrared, our fiber coupled detector based on indium gallium arsenide (InGaAs) can be used, with a detection range from 800 to 1700 nm and a bandwidth of 1.2 GHz (# DET01CFC) or 5 GHz (# DET08CFC). For high-speed signal monitoring, Thorlabs recommends using a 50 Ω load resistor. For lower bandwidth applications, our adjustable terminal connectors or fixed terminal connectors can quickly adjust the measurement voltage.

| Item # | DET02AFC | DET025AFC | DET01CFC | DET08CFC |
| Wavelength Range | 400 - 1100 nm | 400 - 1100 nm | 800 - 1700 nm | 800 - 1700 nm |
| Material | Si | Si | InGaAs | InGaAs |
| Bandwidth (-3 dB)a,b,c | 1 GHz | 2 GHz | 1.2 GHz | 5 GHz (Max) |
| Fiber Input | FC/PC | FC/PC | FC/PCd | FC/PC |
| Signal Output | SMA | SMA | SMA | SMA |
| Minimum Resistor Load | 50 Ω | 50 Ω | 50 Ω | 50 Ω |
| Maximum Peak Power | 18 mW | 18 mW | 18 mW | 100 mW |
| Saturation Power (CW) | - | - | 5.5 mW (1550 nm)b | - |
| Output Voltage | 0 to 3.3 V (50 Ω) 0 to 10 V (Hi-Z) | 2 V (Max)e | 0 to 1 V (50 Ω)f 0 to 10 V (Hi-Z) | 2 V (Max)e |
| Rise Time (tr)a,b,c | 1 ns @ 730 nm (Max) | 150 ps @ 653 nm, 20/80% (Typ.) | < 1 nsg @ 1310 nm | 70 ps @ 952 nm, 20/80% (Typ.) |
| Fall Time (tf)a,b,c | 1 ns @ 730 nm (Max) | 150 ps @ 653 nm, 80/20% (Typ.) | < 1 nsg @ 1310 nm | 110 ps @ 952 nm, 80/20% (Typ.) |
| Bias Voltage | 12 V |
| Dark Current | 126 pAh | 35 pAa,h | 0.235 nAa,h | 1.5 nAa,h |
| NEP (Maximum) | 9.5 x 10-15 W/√Hz (@ 730 nm) | 9.29 x 10-15 W/√Hz (@ 730 nm) | 4.5 x 10-15 W/√Hz (@ 1550 nm) | 2 x 10-15 W/√Hz (@ 1550 nm) |
| Junction Capacitance | 1.73 pF (Max) | 1.73 pF (Max) | 2.4 pF (Typical) | 0.3 pF |
| Photodiode Element | FDS02 | FDS02 | FGA01FC | - |