The Keysight (Agilent) 81613A is a high-performance optical return loss (ORL) module designed for the Keysight 816x Lightwave Multimeter series mainframes. It features integrated Fabry-Perot laser sources at 1310 nm and 1550 nm, providing accurate and stable return loss measurements for single-mode fiber components and networks.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | Mainframe-dependent (GPIB, USB, LAN via Keysight 8163/8164/8166 mainframes) |
| Display | None (uses mainframe display) |
| Recommended Calibration Cycle | 2 years |
Physical
| Parameter | Value |
|---|---|
| Power Supply | Powered via mainframe module slot |
| Operating Temperature | 0 °C to +40 °C |
| Dimensions (W×H×D) | 75 mm x 32 mm x 335 mm |
| Weight | 0.5 |
Optical Source Specifications
| Parameter | Value |
|---|---|
| Internal Source Wavelengths | 1310 nm ± 20 nm, 1550 nm ± 20 nm |
| Internal Laser Type | Fabry-Perot (FP) Laser |
| Spectral Bandwidth (FWHM) | < 5 nm (1310 nm), < 10 nm (1550 nm) |
| Output Power Level | ≥ +1.0 dBm (into SMF 9/125 µm) |
| Output Power Stability (15 min) | ±0.02 dB (at constant temperature) |
| Output Power Stability (24 hours) | ±0.05 dB (for ±1 K temperature change) |
| Laser Safety Class | Class 1 (FDA 21 CFR 1040.10, IEC 60825-1) |
Optical Receiver Specifications
| Parameter | Value |
|---|---|
| Sensor Element Type | InGaAs Photodetector |
| Internal Receiver Wavelength Range | 1250 nm to 1640 nm |
| Power Measurement Range | +10 dBm to -80 dBm |
| Power Linearity (0 to -50 dBm) | ±0.05 dB |
| Power Linearity (-50 to -70 dBm) | ±0.15 dB |
Return Loss Measurement Specifications
| Parameter | Value |
|---|---|
| Return Loss Range (Single-mode) | 0 to 70 dB |
| Return Loss Accuracy (0 to 50 dB) | ±0.4 dB |
| Return Loss Accuracy (50 to 60 dB) | ±0.65 dB |
| Return Loss Accuracy (60 to 70 dB) | ±1.7 dB |
| Return Loss Resolution | 0.01 dB |
| External Source Input Wavelength Range | 1250 nm to 1640 nm |
| External Source Max Input Power | +10 dBm |
Optical Interfaces and Fiber Compatibility
| Parameter | Value |
|---|---|
| Fiber Type Compatibility | Single-mode (9/125 µm) |
| Connector Interface Options | Option 021: Straight Contact, Option 022: 8° Angled Contact |
| Connector Keying | Narrow key (2.0 mm) |
Mainframe Integration and Software
| Parameter | Value |
|---|---|
| Compatible Mainframe Models | 8163A, 8163B, 8164A, 8164B, 8166A, 8166B |
| Module Slot Occupancy | 1 slot |
Environmental and Physical Specifications
| Parameter | Value |
|---|---|
| Storage Temperature Range | -40 °C to +70 °C |
| Warm-up Time | 20 minutes |
Environmental
| Parameter | Value |
|---|---|
| Operating Humidity | < 80% R.H. at 35 °C (non-condensing) |
| Storage Humidity | Non-condensing |
| Operating Altitude | 2000 m |
| Storage Altitude | 4600 m |
| Pollution Degree | 2 |
| Installation Category | II |
Power Meter
| Parameter | Value |
|---|---|
| Power Meter Calibration Uncertainty | ±4.5% (at reference conditions 1310 nm / 1550 nm) |
| Power Meter Noise Level | < -80 dBm |
| Power Meter Spectral Ripple | < ±0.01 dB |
Internal Laser Sources
| Parameter | Value |
|---|---|
| Internal Source Wavelength Tolerance | ±20 nm |
External Source Input
| Parameter | Value |
|---|---|
| External Source Path Insertion Loss | 7.5 dB (typical) |
Technology
Optical Return Loss (ORL) Measurement
Applications
Characterization of optical components, fiber cable testing, and optical network installation
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