These free space photoreceivers consist of high speed Si or InGaAs photodetectors with a built-in amplifier with up to 26 dB of gain. They are excellent for viewing rapid modulation of low-power CW lasers or other light sources in the µW regime. The detectors are AC coupled and feature a bandwidth ranging from 1.2 GHz up to 1.5 GHz.
| Compare | Model | Drawings, CAD & Specs | Availability | Price | |||
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818-BB-21A Optical Receiver, AC coupled, 300-1100 nm Biased Silicon Detector, 1.2 GHz |
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$700.00 |
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818-BB-30A Optical Receiver, AC coupled, 1000-1600 nm Biased InGaAs Detector, 1.5 GHz |
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$750.00 |
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| Models |
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| Bandwidth | 30 kHz to 1.2 GHz | 30 kHz to 1.5 GHz | |
| Detector Diameter | 0.4 mm | 0.1 mm | |
| Detector Material | Silicon | InGaAs | |
| Detector Type | PIN | PIN | |
| Wavelength Range | 300-1100 nm | 1000-1600 nm | |
| Acceptance Angle | 10° | 20° | |
| Bias Voltage | 24 V | 24 V | |
| Maximum Conversion Gain | 450 V/W at 830 nm | 900 V/W at 1300 nm | |
| Rise Time | 500 ps | 400 ps | |
| NEP | 60 pW/√Hz | 30 pW/√Hz | |
| Output Connector | BNC | BNC | |
| Output Impedance | 50 Ω | 50 Ω | |
| Power Requirements | Includes AC adapter | Includes AC adapter | |
| Thread Type | 8-32 and M4 | 8-32 and M4 |
The 818-BB-21A features a 0.4 mm diameter silicon photodetector with a wavelength range of 300 to 1100 nm. This 24 V biased free space receiver has an acceptance angle of 10°. The Amplified PIN Photodetector utilizes the photovoltaic effect to convert optical power into an electrical current.
The 818-BB-30A features a 0.1 mm diameter InGaAs photodetector with a wavelength range of 1000 to 1600 nm. This 24 V biased free space receiver has an acceptance angle of 20°. The Amplified PIN Photodetector utilizes the photovoltaic effect to convert optical power into an electrical current.
These high speed detectors make a great free space front end for an scope or spectrum analyzer. When terminated into 50Ω into an oscilloscope, the pulsewidth of a laser can be measured. When terminated into a spectrum analyzer, the frequency response of a laser can be measured.
An 8-32 threaded hole at the bottom of 818-BB biased photoreceivers allows for optical post mounting.
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.
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