The HP/Agilent 81689A is a compact tunable laser module engineered for precise wavelength control across the C-band (1525–1575 nm). Designed for optical testing, DWDM system characterization, and telecommunications applications, it delivers optical output ≥ +6 dBm with 0.01 nm wavelength resolution and ±0.3 nm accuracy. The module offers exceptional wavelength stability (±0.02 nm over 24 hours) and 20 MHz spectral linewidth, supporting both internal and external digital modulation up to 1 MHz, plus external analog modulation from 5 kHz to 1 MHz. Available with standard single-mode or polarization-maintaining (Panda) fiber options with straight or angled connectors, the 81689A integrates into Agilent 8163, 8164, and 8166 series mainframes for flexible test configuration during DWDM installation and maintenance.
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 (24 hours)
• Optical Output Level: ≥ +6 dBm (1525–1575 nm)
• Spectral Linewidth: 20 MHz
• Output Isolation (typ.): 38 dB
• Return Loss (typ.): 40 dB (options 021, 071)
• Optical Power Stability: ±0.03 dB (1 hour, constant temperature)
• Tuning Speed: 45% duty cycle, 300 kHz to 1 MHz
• External Digital Modulation: >45% duty cycle, fall time 15% modulation depth, 5 kHz to 1 MHz
– Key Features
• Four fiber/connector options: standard single-mode straight contact (021), angled contact (022), polarization-maintaining Panda straight contact (071), angled contact (072)
• Polarization-maintaining fiber: TE mode on slow axis, 16 dB extinction ratio (typ.)
• Operating temperature 15 °C to 35 °C; < 40 minutes warm-up time
• Class IIIb laser (FDA 21 CFR 1040.10); Class 3A (IEC 825-1: 1993)
• Delivered with commercial calibration certificate and test report; 2-year recalibration interval
– Compatibility & Integration
Compatible with Agilent 8163A, 8163B, 8164A, 8164B, 8166A, and 8166B mainframes.
