The HP 81689A Tunable Laser module with option 021 is a compact optical signal source for precise wavelength control in test and measurement applications. Operating across the C-band from 1525 nm to 1575 nm, this module delivers stable, accurate signals with 0.01 nm resolution and ±0.3 nm accuracy. The option 021 configuration includes a standard single-mode fiber output with straight contact connector, 20 MHz spectral linewidth, and internal/external digital modulation capabilities. Output power exceeds +6 dBm across the entire wavelength range with ±0.03 dB stability over one hour. Tuning speed is less than 10 seconds per 50 nm span. Wavelength repeatability of ±0.05 nm and 24-hour stability of ±0.02 nm enable reliable component and system characterization in telecommunications, photonics, and R&D environments. The module integrates into Agilent 816x series mainframes and requires warm-up of less than 40 minutes. Operating temperature range is 15 °C to 35 °C, with Class IIIb laser safety classification per FDA 21 CFR 1040.10.
Technical Specifications
• Wavelength range: 1525 nm to 1575 nm
• Wavelength resolution: 0.01 nm (1.25 GHz at 1550 nm)
• Wavelength accuracy: ±0.3 nm
• Wavelength repeatability: ±0.05 nm
• Wavelength stability: ±0.02 nm over 24 hours
• Spectral linewidth: 20 MHz
• Optical output power: > +6 dBm across 1525–1575 nm
• Optical power stability: ±0.03 dB over 1 hour
• Tuning speed: < 10 seconds per 50 nm
• Warm-up time: < 40 minutes
• Operating temperature: 15 °C to 35 °C
• Storage temperature: −20 °C to +70 °C
• Relative humidity: 45 % duty cycle, fall time < 300 ns, 200 Hz to 1 MHz
• TTL reference and input signal support via mainframe
• Built-in safety circuitry for fault-condition optical output disable
– Typical Applications
• Optical component characterization
• Telecommunications system testing
• Photonics research and development
– Compatibility & Integration
• Compatible with Agilent 816x series mainframes
• Requires Agilent 81000xI Series optical interface connectors
