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
  • Matched InGaAs detectors
  • DC to 125 MHz Analog Bandwidth
  • Selectable Gain Settings
  • Operates from Battery or Line Power
  • Capability to drive 50 Ohm output loads
  • Low Noise - 3.6 pW/root-Hz
  • Coherent Heterodyne Detection
  • Polarization-Shift-Keying Modulation
  • Spectroscopy
  • Binary Differential Phase-Shift Keying (2-DPSK)


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

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The TIA-527 balanced optical to electrical converter operates by subtracting the photo currents from two well-matched Indium Gallium Arsenide detectors. The result is then amplified and presented to the output port. Each of the optical signals causes the output to move with a different sense. Common mode signals (e.g. laser RIN noise) are effectively cancelled out.
With selectable gain settings and a bandwidth of DC to 125 MHz this receiver is useful for coherent heterodyne detection applications, differential polarization or phase shifted keying modulation systems, spectroscopy, and similar applications for which the ability to discern small variations in signal strength in two optical paths is critical.
Use of this converter can greatly simplify signal processing requirements downstream from the experiment. Gains of 1400 V/W, 14 000 V/W and 140 000 V/W may be selected as well as selectable AC inter-stage coupling.
The unit is designed to be conveniently mounted on an oscilloscope input BNC connector and may be powered by its internal battery or with the universal wall-mount supply that is provided with each unit. The unit is backed by a two year warranty.