Agilent/Keysight 81602A Tunable Laser Module (1250–1370 nm)

The Keysight 81602A is a tunable laser module delivering high-power optical output across the O-band spectrum. Operating from 1250 nm to 1370 nm with peak power exceeding +18 dBm, it addresses the demanding power budgets of silicon photonics characterization, integrated photonic device testing, and optical communications validation. The module combines exceptional wavelength accuracy (±1.5 pm typical) with fast bidirectional sweep capability up to 200 nm/s and built-in wavelength metering for precision tuning.

Output is delivered through a polarization-maintaining fiber port with 16 dB polarization ratio, ensuring well-defined state of polarization for sensitive optical measurements. Power stability of 0.01 dB supports repeatable test sequences across extended operating temperatures from −40 °C to 70 °C.

Technical Specifications

• Wavelength Range: 1250 nm to 1370 nm


• Peak Output Power: >+18 dBm


• CW Output Power Range: 10 to 18 dBm


• 100GBASE-LR4 Output Power: +16 dBm


• CWDM Channel Output Power (1271/1291/1311/1331 nm): +12 dBm


• Wavelength Accuracy: ±1.5 pm (typical)


• Sweep Speed: Up to 200 nm/s, bidirectional


• Power Stability: 0.01 dB


• Output Fiber: Polarization Maintaining Fiber (PMF)


• Polarization Ratio: 16 dB


• Laser Classification: Class 3B (IEC 60825-1)


• Warm-up Time: 30 minutes


• Operating Temperature: −40 °C to 70 °C

Key Features

• Built-in wavelength meter enables precise wavelength tuning


• Exceptional power flatness, repeatability, and stability across tuning range


• Fast repetition rate supports accelerated characterization workflows


• Integrated laser head and control unit configuration

Typical Applications

• Silicon photonics device characterization and functional validation


• Integrated optical component testing at specified signal wavelengths


• 100G Ethernet receiver testing (with external modulator, waveform generator, and optical attenuator)


• CWDM and PON standards compliance testing


• High insertion-loss modulator and splitter evaluation

Compatibility & Integration The 81602A operates with 81600B laser programming commands and integrates into the N7700A photonic application suite for streamlined test environment deployment.