HP / Agilent 81689A compact tunable laser is specially designed for the C- Band

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.