• Silicon, UV-Silicon, GaAs & InGaAs versions

• Rise times as fast as 35 ps

• Amplified detectors provide up to 26 dB gain

• Fiber coupling options make alignment easy 

The 818-BB Series Biased Photodetectors are cost effective diagnostic tools suitable for a variety of high speed applications such as viewing of Q-switched, mode-locked, or rapidly modulated laser signals and picosecond laser alignment. 

Features

Silicon and UV-Enhanced Silicon Versions

The 818-BB-20, -21, and -40 consist of free-space, small and large area Silicon detectors, with rise times ranging from 300 ps–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 batteries are easily replaceable and by disconnecting the detector from the oscilloscope input, when not in use, you can extend the lifetime of the batteries. The 818-BB-40 comes with an external 24 VDC power supply. The 818-BB-27 consists of a silicon detector with an enhanced ultraviolet response, making it well suited for the fourth harmonic Nd:YAG, YLF or Glass Lasers and Excimer Lasers. Additionally, its large active area and fast response time make it an excellent general-purpose biased detector for the 200 to 1100 nm wavelength region. To attain its fast response, this detector comes with a 24 VDC external power supply.

GaAs and InGaAs Versions

The 818-BB-30, -31, -35, -45 and -51) consist of free-space, small and large area GaAs or InGaAs detectors, with rise times ranging from 300 ps–1.5 ns. Each unit includes a built-in bias supply consisting of standard 3 V lithium cells and a 50 ohm BNC connector output. The batteries are easily replaceable and by disconnecting the detector from the oscilloscope input, when not in use, you can extend the lifetime of the batteries.

Rise Times as Fast as 25 ps

The 818-BB-35 and 818-BB-45 photodiode detector modules offer a low-cost solution for ultra-fast measurements offering a 12.5 GHz bandwidth. These detectors are suitable for applications where detector risetime of <25 ps (<30 ps for 818-BB-45) are required for Q-switched and Ultrafast Laser output analysis. These detectors also utilize 3 V lithium cells (supplied).

Amplified Versions For Up to 26 dB of Gain

The 818-BB-21A, -30A, -35A, -45A, and -51A amplified detectors consist of Si, GaAs or InGaAs detectors having a built-in amplifier with approximately up to 26 dB of gain. It is 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 1.2GHz up to 10.7 GHz. A wall plug-in style power supply is provided with these units.

Fiber Coupled Version for Easy Alignment

The 818-BB-35F, -45F, -51F, -35AF, -45AF, and -51AF are 1 meter long single mode fiber coupled high speed detectors with an FC connector. We have already done the alignment for you with these fiber models as the PIN diodes used for these particular models are quite small (<40 µm).

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.

Accessories

Dimensions