Optical-electrical converter TIA-525

fiber optics

Features • 125 MHz bandwidth • <3 pA/Hz1/2 RMS noise • 1 KV/W to 100 KV/W selectable gain settings • InGaAs or Si detectors for use at all fibre optic wavelengths • Powered by an internal battery • Capable of driving a 50 ohm load • AC or DC coupling • ST or FC connectors • Mounts on BNC input of an oscilloscope The TIA-525 optical receiver is a convenient, easy to use optical to electrical converter. It is extremely useful in a variety of laboratory and field service situations where a quick check of the operation of a laser source, optical transmitter, or the output of a fibre optic communications link is required. The use of surface-mount construction techniques permits the unit to be mounted directly on the vertical input BNC connector of an oscilloscope, digitiser or lock-in amplifier. Simply energise the battery powered unit and the optical signal presented to the fibre input port is faithfully reproduced on the oscilloscope screen. Both Silicon and Indium-Gallium-Arsenide detectors are available to cover the 400 to 1000 nm or 900 to 1700 nm spectral regions respectively. Gains are switch selectable and provide peak responsivity values of approx. 1000 to 100,000 volts per watt. AC coupling between stages may be introduced in order to examine weak high frequency optical signals in the presence of a strong DC optical component. The TIA-500 electrical bandwidth exceeds 125 MHz in the low and medium gain configurations and exceeds 35 MHz in the highest gain configuration. The unit's output stage is fully capable of driving a 50 ohm coaxial cable terminated in its characteristic impedance.