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Time Domain Fiber-Optic Detectors
Time Domain Fiber-Optic Detectors
For the ultimate in signal fidelity, the time-domain-optimized ultra high-speed fiber-optic detectors offer 12- and 18.5-ps full-width-at-half-maximum (FWHM) impulse responses. These detectors are ideal for pulse measurements with digital high-speed oscilloscopes, and they can be used in digital communications applications where spurious ringing can degrade eye diagrams and the bit-error-rate (BER) measurement of your system. Each unit is individually tested and shipped with its own pulse- and frequency-response curves.
- Minimal ringing for Time-domain applications
- Ideal for pulsed laser impulse response measurements
- High sensitivity with visible or near-IR input
- Easy-to-use, self-contained module
- Compatible with SDH and SONET filters See All Features
| Compare | Description | Drawings, CAD & Specs | Avail. | Price | ||
|---|---|---|---|---|---|---|
 | 1024 | In Stock FREE 2-day shipping on thousands of products on Newport.com Learn More | ||||
 | 1444 | 3 Weeks FREE 2-day shipping on thousands of products on Newport.com Learn More | ||||
| 1444-50 | In Stock FREE 2-day shipping on thousands of products on Newport.com Learn More |
Specifications
- Detector MaterialInGaAs
- Responsivity1024: 0.45 A/W
1444: 0.7 A/W
1444-50: 0.6 A/W - Fiber-Optic ConnectorFC/UPC
- NEP1024: 45 pW/√Hz
1444: 30 pW/√Hz - Saturation Power2 mW
- Output ConnectorAnritsu K
- Output Impedance50 Ω
- DC Bias Monitor Bandwidth50 kHz
- DC Bias Monitor Transimpedance Gain1 V/mA
- Power RequirementsInternal 9-V battery
Features
Minimal Ringing for Time-domain Applications
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 BER testing, characterizing modulators and other components, and short-pulsed-laser measurements. For frequency-domain applications, please see our 45 GHz or 25 GHz Fiber-Optic Detectors which provide a flat frequency response over wide bandwidths.
Model 1024 Impulse Response
Measured with a 50-GHz scope and a 150-fs full-width-at-half-maximum input pulse at 1.55 µm.
Model 1444 Impulse Response
Measured with a 50-GHz scope and a 150-fs full-width-at-half-maximum input pulse at 1.55 µm.
High Sensitivity to Visible or NIR
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.
Model 1444 Frequency Response
Input power was 1 mW at 1.06 µm. Measurement accuracy is ±1.5 dB up to 25 GHz.
Model 1024 Responsivity
Model 1444 Responsivity
Model 1024 Frequency Response
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.
Compatible With SDH and SONET Filters
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.
Applications
- Direct temporal proile measurements of nsec pulsed lasers for marking and machining applications
- Characterizing the frequency response of pulsed lasers, modulators & transmitters
- Microwave generation - heterodyne experiments
- Characterizing pulse propagation through dispersive optical systems
Easy-to-use, Self-contained Module
The compact, self-contained packaging of these photodetectors powered by a user-replaceable 9-V battery makes them useful in laboratory investigations of data communications systems. 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.
Resources
Technical Notes
Application Notes
Literature
High Speed Optical Receiver and Detector Brochure(3.8 MB, PDF)
