Optical-electrical converter TIA-1200

signalfiber optics

Features • Bandwidth: DC to 12 GHz • Wavelength range: 900 to 1700 nm • BNC connects to oscilloscope • Battery operation The TIA-1200 optical to electrical converter is a convenient battery powered wideband detection system for fibre optic applications. With a typical bandwidth of DC to 12 GHz (min. 10 GHz), it accurately provides an electrical replica of the optical signal presented to it. It is intended to drive a 50 ohm cable terminated in its characteristic impedance. The unit is equiped with an InGaAs/InP detector that is responsive in the wavelength range of 900 - 1700 nm. The TIA-1200 is provided with an FC fibre optic receptacle. Other fibre optic connectors can be provided on request. The output signal is presented to a type K SMA female connector. Each unit is powered by a self-contained 9 V lithium battery. It is employed to provide reverse bias for the detector. Battery operation eliminates ground loops and the undesirable effects of conducted radiation that may exist on local power lines. The TIA-1200 is comprised of a fibre coupled InGaAs detector coupled with a reverse bias voltage network. The output of the diode is brought out to a type K female SMA connector. Light falling on the detector generates a positive-going proportional current. This current, multiplied by the load impedance produces a voltage that is proportional to the light incident on the detector surface. The active area of the TIA-1200 is 50 microns in diameter. It is coupled to a 50 micron core optical fibre. Thus both singlemode and multimode sources may be tested without incurring excessive coupling losses.