A compact optical-to-electrical converter using an InGaAs detector, optimized for fiber optics in the 850 to 1700 nm range. It offers DC to 125 MHz bandwidth, selectable gain and transimpedance settings, and an custom free-space input with a BNC output.
A compact optical-to-electrical converter using an InGaAs detector, optimized for fiber optics in the 850 to 1700 nm range. It offers DC to 125 MHz bandwidth, selectable gain and transimpedance settings, and an custom free-space input with a BNC output.
The TIA-525 Optical to Electrical Converter is a convenient battery-operated detector/amplifier combination that mounts directly on the input of an oscilloscope, digitizer, or other readout device. With a band width of DC to 125 MHz, it accurately provides an electrical replica of the optical signal presented to it. It is fully capable of driving a 50 ohm cable terminated in its characteristic load.
Two basic models of the unit exist; the TIA-525S, containing a silicon detector for use in the spectral region between 400 and 1000 nm, and the TIA-525 I which contains an IndiumGallium-Arsenide detector and is responsive in the 850 to 1700 nm spectral region. Both units are equipped with an ST fiber optic connector. Custom versions are also available with unconnectorized detectors for free-space beams.
The TIA-525 has selectable transimpedances of 1.4 KΩ and 14 KΩ plus a post amplifier with selectable gains of 1 or 10. Thus the overall responsivity ranges from approximately 1, 000 V/W to 100, 000 V/W at the peak of the detector response curve. Interstage coupling may be switched from DC to AC to avoid saturation of the second stage in those cases where the signal of interest is combined with a relatively large DC optical component.
Each unit is powered by a self-contained 9 V ULTRALIFE lithium battery or a universal wall mount power supply. Battery operation eliminates ground loops and the undesirable effects of conducted radiation that may be present on local power lines.
Features
| Detector Type | 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 |
| Second Stage Gain Selections | X 1 or X 10 |
| Maximum Linear Input Power | 1.2 mW |
| Maximum Input Power without Damage | 10 mW |
| Spectral Response | 850 to 1700 nm |
| Output Impedance | 50 Ohms |
| Output Connector | Male BNC |
| Fiber Optic Connector | Free-Space |
| Input Numerical Aperture | 0.29 |
| Inter-stage Coupling | DC or AC (100 Hz low frequency cutoff) |
| Output Offset Voltage | +/- 0.1 Volt |
| Noise Level | 3.0 pW/√Hz at peak responsivity |
| Maximum Output Voltage | 4 V pk-pk, no load, 2 V pk-pk with 50 Ohm Load |
| Power Requirements | 9 V Lithium Battery or supplied universal wall-mount power supply |
| Battery Life | Approximately 30 hours (no load) |
| Wall-mount Supply Power Requirements | 95 to 260 VAC, 50 to 60 Hz, 16 VA Max |
| Mains Connectors Supplied | North America, British, Continental Europe, Australian |
| LED Annunciators Provided | Power On |
| Operating Temperature Range | 32 to 104°F (0 to 40°C) |
| Standard Warranty | Two Years, Component and Workmanship, 30 Day Satisfaction Guarantee |
| Dimensions (mm) | 2.5 x 1.2 x 1.26" (63 x 30.5 x 32 mm) |
| Weight | 5.6 oz (0.16 kg) |
| Detector Type | 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 |
| Second Stage Gain Selections | X 1 or X 10 |
| Maximum Linear Input Power | 1.2 mW |
| Maximum Input Power without Damage | 10 mW |
| Spectral Response | 850 to 1700 nm |
| Output Impedance | 50 Ohms |
| Output Connector | Male BNC |
| Fiber Optic Connector | Free-Space |
| Input Numerical Aperture | 0.29 |
| Inter-stage Coupling | DC or AC (100 Hz low frequency cutoff) |
| Output Offset Voltage | +/- 0.1 Volt |
| Noise Level | 3.0 pW/√Hz at peak responsivity |
| Maximum Output Voltage | 4 V pk-pk, no load, 2 V pk-pk with 50 Ohm Load |
| Power Requirements | 9 V Lithium Battery or supplied universal wall-mount power supply |
| Battery Life | Approximately 30 hours (no load) |
| Wall-mount Supply Power Requirements | 95 to 260 VAC, 50 to 60 Hz, 16 VA Max |
| Mains Connectors Supplied | North America, British, Continental Europe, Australian |
| LED Annunciators Provided | Power On |
| Operating Temperature Range | 32 to 104°F (0 to 40°C) |
| Standard Warranty | Two Years, Component and Workmanship, 30 Day Satisfaction Guarantee |
| Dimensions (mm) | 2.5 x 1.2 x 1.26" (63 x 30.5 x 32 mm) |
| Weight | 5.6 oz (0.16 kg) |
