The Keysight Technologies (formerly Agilent HP) 81654A is a dual-wavelength Fabry-Perot (FP) Laser Source module designed for the 8163A/B, 8164A/B, and 8166A/B Lightwave Multimeter mainframes. Operating at 1310 nm and 1550 nm, this high-stability source is optimized for optical fiber test applications, insertion loss measurements, and component characterization.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | Through mainframe backplane (GPIB, USB, LAN mainframe-dependent) |
| Display | None (uses mainframe display) |
| Recommended Recalibration Period | 2 years |
Physical
| Parameter | Value |
|---|---|
| Power Supply | Powered by mainframe |
| Operating Temperature | 0 °C to 45 °C |
| Dimensions (W×H×D) | 75 mm x 32 mm x 335 mm |
| Weight | 0.5 kg |
Wavelength Characteristics
| Parameter | Value |
|---|---|
| Center Wavelengths | 1310 nm / 1550 nm |
| Center Wavelength Tolerance | ± 20 nm |
| Spectral Bandwidth (FWHM) at 1310 nm | ≤ 5 nm (typical 3 nm) |
| Spectral Bandwidth (FWHM) at 1550 nm | ≤ 10 nm (typical 6 nm) |
Optical Power Characteristics
| Parameter | Value |
|---|---|
| CW Output Power | ≥ +5 dBm |
| Typical CW Output Power | +7 dBm |
| Power Stability (CW, 15 min) | ≤ ±0.03 dB (at constant temperature) |
| Power Stability (CW, 8 hours) | ≤ ±0.10 dB (at constant temperature ±1 K) |
Polarization & Fiber Specifications
| Parameter | Value |
|---|---|
| Output Fiber Type | 9/125 µm Single-mode |
| Optical Connector Interface | Keysight/Agilent 81000xI series exchangeable |
Modulation Capabilities
| Parameter | Value |
|---|---|
| Internal Modulation Frequencies | 270 Hz, 350 Hz, 1 kHz, 2 kHz |
| Internal Modulation Duty Cycle | 50% (square wave) |
System Integration & Software
| Parameter | Value |
|---|---|
| Mainframe Compatibility | Keysight / Agilent 8163A/B, 8164A/B, 8166A/B |
| Mainframe Slots Required | 1 slot |
Physical & Power Specifications
| Parameter | Value |
|---|---|
| Warm-up Time | 1 hour |
Environmental & Safety Compliance
| Parameter | Value |
|---|---|
| Laser Safety Class | Class 1 |
| Storage Temperature Range | -40 °C to +70 °C |
Source Characteristics
| Parameter | Value |
|---|---|
| Laser Type | Fabry-Perot (FP) |
Environmental
| Parameter | Value |
|---|---|
| Operating Humidity | 15% to 95% R.H. (non-condensing) |
Output Characteristics
| Parameter | Value |
|---|---|
| Power Level Control Resolution | 0.01 dB |
Optical Performance
| Parameter | Value |
|---|---|
| Typical Spectral Bandwidth (FWHM) at 1310 nm | 3 nm |
| Typical Spectral Bandwidth (FWHM) at 1550 nm | 6 nm |
| Wavelength Temperature Coefficient (1310 nm) | typ. 0.4 nm/K |
| Wavelength Temperature Coefficient (1550 nm) | typ. 0.5 nm/K |
| Power Level Control Range | 6 dB |
Modulation
| Parameter | Value |
|---|---|
| External Modulation Frequency Range | 300 Hz to 100 kHz |
Technology
Fabry-Perot (FP) Laser
Applications
Optical fiber testing, loss measurement, fiber characterization