Terahertz Technologies Inc.Terahertz Technologies Inc.
(888) U.S.-OTDRS
TIA-527 Matched InGaAs DC to 125 MHz O/E Converter

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.

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
Binary Differential Phase-Shift Keying (2-DPSK)
Ordering Information
TIA-527-FC Balanced InGaAs, DC to 125MHz O/E Converter with FC Connector
TIA-527 Specifications
Detector Type Matched InGaAs
Analog Signal Bandwidth (-3 dB) DC to 125 MHz (Tr = 1.4 K), DC to 35 MHz (Tr = 14 K)
Selectable Transimpedance Settings 1.4 K Ohms, 14 K Ohms
Gain Selections X 1 or X 10
Maximum Linear Input Power 1.2 mW
Max Input Power without Damage 10 mW
Spectral Response 850 - 1700 nm
Output Impedance 50 Ohms
Output Connector Male BNC
Fiber Optic Connector FC
Input Numerical Aperture 0.29
Inter-stage Coupling DC or AC (100 Hz Low Frequency Cutoff)
Output Offset Voltage +/- 0.1 Volt
Noise Level 3.6 pW/ root-Hz
Maximum Output Voltage 4 V pk-pk, No Load, 2 V pk-pk with 50 Ohm Load
Power Requirements 9V Battery or Supplied Universal Wall-mount Power Supply
Battery Life Approximately 30 hours (No Load)
Wall-mount Supply Power Requirements 95-260VAC, 50 - 60 Hz, 16 VA Max.
Mains Connectors Supplied North America, British, Continental Europe, Australian
Dimensions (mm) 63 L x 30.5 W x 30 H
Weight 5.6 oz (0.16 kg)
LED Annunciators Provided Power On
Operating Temperature Range 0° to 40°C
Standard Warranty Two Years, Component and Workmanship
30 Day Satisfaction Guarantee
Accessories Supplied Transit Case, Universal Power Supply, 9V ULTRALIFE Lithium Battery, Manual

Request a Quote