|
 Features
 |
Bandwidth to 10 GHz (SM) 8.5 GHz (MM) |
|
Wavelength response: 800 to 1600 nm |
|
Low noise, high gain |
|
Conversion gain to 400 V/W |
|
SMA output electrical connector |
|
FC style fibre optic input connector |
The TIA-3000 is an instrument for the laboratory or for
field use. This amplified optical-electrical converter can be used with a wide
range of oscilloscopes and digitisers to provide the utility of a convenient,
easy to use fibre optic probe. Energising the unit, the optical signal
presented to it is faithfully reproduced on the CRT of the oscilloscope or
digitiser.
Applications for this instrument include: checking the
output of fibre optic communication links, data links, fibre optic computer
networks, eye pattern testing, the operation of laser sources and the signal
from an optical transmitter. Patch cords with various style fibre optic
connectors can expand the utility of the instrument.
The TIA-3000 is comprised of a fibre coupled InGaAs
detector coupled with a reverse bias voltage network and fast transimpedance
amplifier. The output of the unit 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 transimpedance produces a
voltage that is proportional to the light incident on the detector surface.
Normally the unit is used to drive a coaxial cable. This
cable should have a 50 ohm characteristic impedance and be terminated with a 50
ohm load at the oscilloscope or other measuring device to be used.
The active area of the TIA-3000 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.
Typical optical return loss is 35dB and is caused
primarily by the FC/PC connector employed. If higher return loss is needed, the
unit may be optionally equipped with singlemode angled PC connectors for ORLs
of around 52dB.
Specifications
|
Detector type: InGaAs (800-1600 nm) |
|
Current responsivity: 0.7 A/W @ 1550 nm |
|
Conversion gain: 400 V/W @ 1550 nm |
|
Amplifier power gain: 20dB |
|
Bandwidth: 10 GHz @ 1550 nm |
|
Noise (typical): 15 pA/Hz1/2 |
|
Digital sensitivity: -20dBm @ BER 10-1/2 |
|
Operating temperature: -40/+85 C |
|
