For the ultimate in signal fidelity, the time-domain-optimized ultrahigh-speed photodetectors offer 12 and 18.5-ps full-width-at-half-maximum (FWHM) impulse responses. Each photodetector is individually tested and shipped with its own pulse- and frequency-response curves. If your application requires a flat frequency response, you may want to look at our popular 25 or 45-GHz photodetectors.
| Model | Description | Availability | Price | Qty. | |
|---|---|---|---|---|---|
| 1024 | Time Domain Photodetector, 500-1630 nm, 12 ps, Singlemode FC | Call | ¥46,172.29 | ADD |
| 1444 | Time Domain Photodetector, 500-1630 nm, 18.5 ps, Singlemode FC | Call | ¥39,036.57 | ADD |
| 1444-50 | NIR Photodetector, 850-1630 nm, 18.5 ps, Multimode FC | Call | ¥41,555.05 | ADD |
Impulse response of the Model 1024 measured with a 50-GHz scope and a 150-fs full-width-at-half-maximum input pulse at 1.06 µm.
This impulse response, typical of the Models 1444 , was measured with a 50-GHz scope and a 150-fs full-width-at-half-maximum input pulse at 1.06 µm.
With clean, fast impulse responses with minimal ringing, these photodetectors are ideal for time-domain applications in high-speed digital fiber-optic communications systems including bit-error-rate (BER) testing, characterizing modulators and other components, and short-pulsed-laser measurements.
Our Time Domain Photodetectors utilize a InGaAs diode providing wavelength coverage from 500 to 1630 nm for single mode and 850 to 1630 nm for multimode fiber.
These self-contained modules are powered by a user-replaceable 9-V battery. The photodiode bias circuit and battery are built into the RF-shielded case, reducing the risk of damage from excessive voltage or rough handling, and eliminating the need for expensive bias tees. All these photodetectors also come equipped with a DC-bias monitor that has a transimpedance gain of 1 mV/µA in a 50-kHz bandwidth.
Because of their optical-fiber input, these photodetectors can be connected directly to electronic instruments, eliminating the need for expensive and lossy high-frequency microwave cables. For your convenience, these photodetectors are internally terminated at 50 Ω, so they don’t require a 6-dB attenuator to achieve a good impedance match with SDH and SONET filters or when used with microwave filters.
Characterizing the frequency response of pulsed lasers, modulators & transmitters
Microwave generation - heterodyne experiments
Characterizing pulse propagation through dispersive optical systems
| 1024 | |
|---|---|
| Wavelength Range (nm) | 500-1630 |
| Bandwidth (-3 dB) | 26 GHz |
| Rise Time (ps) | 11/12 ps (typ/max) |
| Conversion Gain, Maximum (V/W) | 10 |
| NEP (pW/√Hz) | 45 |
| Output Impedance | 50 |
| Optical Input | Singlemode FC |
| Detector Material | InGaAs |
| Output Connector | Wiltron® K Connector |
| Power Requirements | internal 9-V battery |
| Responsivity (Peak) | 0.45 |
| DC Bias Monitor Transimpedance Gain | 1 V/mA |
| 1444 | 1444-50 | |
|---|---|---|
| Wavelength Range (nm) | 500-1630 | 850-1630 |
| Bandwidth (-3 dB) () | 20 GHz | 20 GHz |
| Impulse Response, Maximum (ps) | 19 | 19 |
| Conversion Gain, Maximum (V/W) | 15 | 11 |
| Responsivity (Peak) (A/W) | 0.7 | 0.6 |
| Detector Diameter (mm) | 0.021 | 0.021 |
| Detector Material | InGaAs | InGaAs |
| Output Impedance (Ω) | 50 | 50 |
| NEP (pW/√Hz) | 30 | 30 |
| Bandwidth, DC Bias Monitor (kHz) | 50 | 50 |
| DC Bias Monitor Transimpedance Gain (V/mA) | 1 | 1 |
| Saturation Power CW (mW) | 2 | 2 |
| Optical Input | Singlemode FC | Multimode FC |
| Output Connector | Wiltron® K Connector | Wiltron® K Connector |
| Power Requirements | internal 9-V battery | internal 9-V battery |
Predicted and typical responsivity of the photodetector in the Model 1024 .
Typical frequency response of Model 1024 . Input power was 0.5 mW at 1.06 µm. Measurement accuracy is ±1.5 dB up to 40 GHz, and ±3.5 dB from 40 to 50 GHz.
Typical frequency response of the Model 1444 . Input power was 1 mW at 1.06 µm. Measurement accuracy is ±1.5 dB up to 25 GHz.
