High Speed Photodetector, 300-1100 nm Biased Silicon Detector, 25 MHz

biased free space high speed photo detector model 818-bb-40

The 818-BB-40 High Speed Silicon Detector consists of a free-space 350 to 1100 nm externally biased Silicon photodetector with a 4.57 mm active diameter and a <30 ns rise time. This detector comes with a 24 VDC external power supply. It includes a 50 ohm BNC connector output. It is a low-cost solution for ultra-fast measurements up to a 25 MHz bandwidth. This detectors are suitable for applications where detector rise time of <30 nsec are required for Q-switched and Ultrafast Laser output analysis. The 818-BB-40 comes with an external 24 VDC power supply. It is equivalent to Coherent's Model ET-2040 (P/N 120-10028-0001).

Silicon Free Space Optical Detectors

The 818-BB-21 and -40 consist of free-space, small and large area Silicon detectors, with rise times ranging from 300 ps to 1.5 ns. Each unit, other than the 818-BB-40, includes a built-in bias supply consisting of standard 3 V lithium cells and a 50 ohm BNC connector output. The 818-BB-40 comes with an external 24 VDC power supply.

Optical Post Mounting

An 8-32 threaded hole at the bottom of 818-BB biased photoreceivers allows for optical post mounting.

Handle With ESD Care

These detectors are very susceptible to damage by electrostatic discharge (ESD). Please use ESD protective measures, like the FK-STRAP , when unpacking and handling these devices.

Specifications

Technical Specs

Optical Input
Free Space
Device Type
Biased Detector
Detector Diameter
4.57 mm
Detector Material
Silicon
Detector Type
PIN
Acceptance Angle
60°
Wavelength Range
350-1100 nm
3 dB Bandwidth
DC to 25 MHz
Rise Time
30 ns
Responsivity
0.6 A/W @ 830 nm

Amplified
No
Bias Voltage
24 V
Cut-off Frequency
>25 MHz
Dark Current
<10 nA
Junction Capacitance
<45 pF
Reverse Breakdown
50 V
NEP
<0.09 pW/√Hz
Fall Time
<30 ns
Saturation Current
2 mA
Thread Type
8-32 and M4

Optical Input
Free Space
Device Type
Biased Detector
Detector Diameter
4.57 mm
Detector Material
Silicon
Detector Type
PIN
Acceptance Angle
60°
Wavelength Range
350-1100 nm
3 dB Bandwidth
DC to 25 MHz
Rise Time
30 ns
Responsivity
0.6 A/W @ 830 nm

Amplified
No
Bias Voltage
24 V
Cut-off Frequency
>25 MHz
Dark Current
<10 nA
Junction Capacitance
<45 pF
Reverse Breakdown
50 V
NEP
<0.09 pW/√Hz
Fall Time
<30 ns
Saturation Current
2 mA
Thread Type
8-32 and M4

Resources & Downloads

3D Product Models

2D Product Drawings

Silicon Photodetectors Datasheet(663 kB, PDF)
Non-amplified Photodetectors User's Manual(788.3 kB, PDF)
818-BB Battery Installation(1.2 MB, PDF)
MKS EU RoHS2 - 818-BB Detectors(287.8 kB, PDF)
Optical Receiver Finder

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