88-65 76th Avenue • Glendale, NY 11385, USA • Tel: 718-997-8100 • Fax: 718-997-8102 • www.eopc.com

Fiber Optic O/E Converters
TIA-525 TIA-527 TIA-952 TIA-1200 TIA-2000 TIA-3000 TIA-4000
  • Wavelength Response 950 nm to 1650 nm
  • Low Noise, High Gain
  • Gain Settings from 2 to 7
  • Bandwidth 30 KHz to 7 GHz typical
  • SMA type K Output Electrical Connector
  • FC/APC Style Fiber Optic Input Connect


optical modulators
resonant choppers
rotating choppers
q switches
pockels cells
a-o modulators
e-o modulators
beam deflectors

shutters and filters
filter selectors
tunable filters
laser safety shutters
interlock shutters

modulating systems
locked to ext. clock
master/slave mode
a-o systems
e-o systems

scanners and

resonant scanners
polygon scanners
beam deflectors
peizo scanners

scanning systems
locked to ext. clock
master/slave mode
x,y raster mode
a-o systems

other products
photo diode amplifiers
o/e and e/o converters
fiber optic multiplexers
fiber optic video links
laser vibrometers
lock-in amplifiers

contact us

The TIA-4000 is comprised of a fiber coupled InGaAs APD detector combined with a variable reverse bias voltage network and fast transimpedance amplifier. The output of the unit 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-4000 is 30 microns in diameter. It is coupled to a single mode optical fiber. Typical optical return loss is 52 dB and is caused primarily by the FC/APC connector employed. The applied bias voltage controls the gain of the APD. This voltage in turn, is controlled by means of the two push buttons on the top panel. The rightmost button increases the gain and the leftmost button decreases the gain. There are 64 discrete gain settings that are retained in non-volatile memory when the power is turned off. Thus the gain setting will be retained even though power is disconnected from the unit. Pressing a button once causes the unit to advance in the selected direction by one step. Holding the button down causes the unit to advance automatically until a limit is reached. The unit is backed by a two year warranty.