High speed with high dynamic range
Instrument quality linear photoreceiver in small package
Low-noise amplifier
Multimode option available
Photocurrent monitor
Protected bias circuitry
The 22 and 38 GHz (14X4) photoreceivers are top of the line high-speed measurement devices for optical waveforms. These modules convert optical signals to ultra-clean electrical signals and can be used to provide every high-speed/high-frequency instrument in your lab an optical input.
| Model | Description | Availability | Price | Qty. | |
|---|---|---|---|---|---|
| 1474-A | InGaAS High Speed Photoreceiver, 630-1620 nm, 38 GHz, Singlemode FC | Contact Sales | ||
| 1484-A | GaAS High Speed Photoreceiver, 630-865 nm, 22 GHz, FC Singlemode Input | Contact Sales | ||
| 1484-A-50 | GaAS High Speed Photoreceiver, 800-865 nm, 22 GHz, FC Multimode Input | Contact Sales |
In Model 1474-A (shown left) an InGaAs PIN photodiode (shown left) is followed by a low-noise, linear, high-bandwidth amplifier to provide a 38 GHz bandwidth. In Models 1484-A and 1484-A-50 (shown right) a larger GaAs photodiode is followed by the same amplifier to provide a 22 GHz bandwidth.
The small size of the modules allows you to connect them directly to your test instrument or another high-speed component. This eliminates the need to follow the photoreceiver with coaxial cable, which can distort time-domain waveforms and attenuate CW microwave signals.
The amplifier combines moderate gain and low noise to reduce the input-referred noise floor of your system. It also maintains linearity at high output levels, providing a high dynamic range.
Typical responsivity of the 1484-A-50.
In models with single-mode fiber the optical signal is delivered to the PIN photodiode through a 0.1 m, 9-um core optical fiber, while in the Model 1484-A-50 the signal is delivered through a 50-µm core graded-index multimode fiber of the same length. An internal lens in the 1484-A-50 focuses the light onto the small high-speed PIN photodiode.
| 1474-A | 1484-A | 1484-A-50 | |
|---|---|---|---|
| Wavelength Range (nm) | 630-1620 | 630-865 | 800-865 |
| Bandwidth (-3 dB) | 38 / 35 GHz | 22 / 20 GHz | 22 / 20 GHz |
| Rise Time (ps) | 12.5 | 16.5 | 16.5 |
| Conversion Gain, Maximum (V/W) | -65 | -70 | -65 |
| Conversion Gain, Typical (V/W) | -75 | -80 | -75 |
| NEP (pW/√Hz) | 38 | 36 | 38 |
| DC Bias Monitor Transimpedance Gain (V/mA) | 1 | 1 | 1 |
| Cut Off Frequency (kHz) | 10 | 10 | 10 |
| Bandwidth, DC Bias Monitor (kHz) | 15 | 15 | 15 |
| Output Impedance (Ω) | 50 | 50 | 50 |
| Optical Input | SM FC/PC | SM FC/PC | 50-µm MM FC/PC |
| Detector Material | InGaAs | GaAs | GaAs |
| Output Connector | Anritsu K | Anritsu K | Anritsu K |
| Power Requirements | ±15 V, <100 mA | ±15 V, <100 mA | ±15 V, <100 mA |
Typical frequency response of the 1474-A.
Typical frequency response of the 1484-A and 1484-A-50.