Advantest Q81211 – LED Light Source

The Advantest Q81211 is a 1310 nm FP-LD (Fabry-Perot Laser Diode) light source module designed for optical testing and measurement applications. It plugs into the Advantest Q8221 Optical Multi Power Meter mainframe to provide stable, controlled optical signal generation for evaluating optical components and systems.

– Technical Specifications

• Light Source Type: FP-LD (Fabry-Perot Laser Diode)
• Wavelength: 1310 nm ± 20 nm
• Spectrum Width: < 10 nm
• Output Power: 0 dBm ± 1 dBm
• Attenuator Range: 0 to -6.0 dB
• Attenuator Step: 0.1 dB steps
• Power Stability: < 0.01 dB/min
• Output Mode: CW (Continuous Wave) or Chopped (270 Hz, 2 kHz, 4 kHz)
• Optical Connector: FC/PC
• Broadband Wavelength Compensation: Supported

– Key Features

• Precise 1310 nm emission with ± 20 nm tolerance for telecom-band testing
• Fine-resolution attenuator with 0.1 dB steps across a 6 dB range
• Excellent output stability at < 0.01 dB/min minimizes measurement drift
• Flexible modulation: selectable CW or chopped modes at 270 Hz, 2 kHz, or 4 kHz
• Integrated broadband wavelength compensation for enhanced accuracy
• FC/PC optical interface for standard fiber coupling

– Typical Applications

• Optical component characterization and evaluation
• Optical fiber testing and diagnostics
• Photodetector performance assessment
• Passive component measurements
• System-level optical signal generation for multiwavelength setups

– Compatibility & Integration

The Q81211 operates exclusively as a plug-in module within the Advantest Q8221 Optical Multi Power Meter mainframe. Power delivery and control are managed by the mainframe unit. This architecture enables modular expansion of measurement capability without standalone instrumentation.