Keysight 81663A Tunable Laser Source - Comprehensive Product Overview
The Keysight 81663A is a high-precision tunable laser source designed for optical communications R&D, production testing, and photonic device validation. With exceptional wavelength stability, narrow linewidth, and high output power, it serves as an ideal solution for advanced applications including 400G/800G coherent optical communications, DWDM systems, and silicon photonics testing. This detailed introduction covers four key aspects: core specifications, features, applications, and configuration options.
1. Key Specifications Table
| Parameter Category | Technical Specifications | Notes |
|---|
| Wavelength Range | 1480–1640 nm | C+L band coverage |
| Output Power | Up to +13 dBm | Supports power calibration |
| Power Stability | < ±0.01 dB (over 8 hours) | Within ±1°C temperature variation |
| Spectral Linewidth | < 100 kHz (typical) | Suitable for coherent communications |
| Wavelength Accuracy | ±1 pm (with external calibration) | Real-time calibration with optional built-in wavemeter |
| Tuning Resolution | 1 pm (minimum step) | Continuous tuning |
| Modulation Bandwidth | Analog: DC–100 MHz
Digital: 10 Gb/s NRZ (optional) | Supports external modulation input |
| Polarization Extinction Ratio | > 30 dB | Reduces polarization-dependent loss effects |
| Connector Type | FC/PC or FC/APC (standard) | Polarization-maintaining fiber option available |
2. Key Features
High-Precision Tuning
Achieves ±1 pm wavelength repeatability through built-in high-resolution grating and closed-loop control, ideal for testing narrowband filters and DWDM components.
Low-Noise Output
Isolation-based optical design with >50 dB side-mode suppression ratio (SMSR) ensures signal purity for high-sensitivity receiver testing.
Automation Integration
Supports SCPI commands for seamless integration with Keysight N77xx/96xx test systems or multi-channel synchronization via PXIe platforms.
Preloaded Application Templates
Includes wavelength-power profiles for communication standards like 5G fronthaul (eCPRI) and 400G-ZR for one-click test setup.
3. Application Scenarios & Recommended Configurations
| Application Field | Testing Requirements | Recommended Accessories |
|---|
| Coherent Optical Modules | Modulator linearity, EVM testing | 81606B Optical Power Meter + N1092D BER Tester |
| Silicon Photonics | Wavelength-dependent loss (WDL) analysis | 81635A Polarization Controller + 81634B Detector |
| Optical Amplifiers | Gain flatness, NF measurement | 81600B Optical Spectrum Analyzer |
| Quantum Communications | Single-photon source wavelength calibration | 81599A Optical Attenuator (-70 dB range) |
4. Optional Configurations Guide
| Option Code | Function Description |
|---|
| 81663A-1CM | C-band extension (1525–1565 nm) with ±0.5 pm wavelength accuracy |
| 81663A-10G | 10 Gb/s NRZ digital modulation with PRBS pattern generation |
| 81663A-PM | Polarization-maintaining fiber output (PER > 20 dB) |
| 81663A-WLM | Built-in high-precision wavemeter for real-time wavelength drift calibration |
5. Product Advantages Summary
Precision & Reliability: Military-grade temperature control ensures 24/7 operational stability.
Flexible Expandability: Modular architecture supports future upgrades (e.g., millimeter-wave band expansion).
Efficiency Boost: Keysight PathWave software enables test automation, reducing R&D cycles by 50%.
For technical documentation or customized solutions, visit Keysight's official website or contact local technical support.
