Tunable laser sources expand spectral test options

Posted By : Mick Elliott
Tunable laser sources expand spectral test options

The 81607A, 81608A and 81609A tunable laser sources are a range of modules for the Keysight 8164B lightwave measurement system. The modules extend the product family that debuted in March 2015 with the 81606A tunable laser source, an instrument with sub-picometer tuning repeatability and wavelength accuracy that is maintained even in full-speed, two-way sweeps.

The value and basic line models share the 81606A’s new design with low spontaneous emission and narrow line width, power repeatability and long-term stability. The modules offer engineers additional price-performance options based on output power, tuning speed, wavelength accuracy and repeatability.

Whether engineers need to verify the design of demanding optical components or adjust more wavelength-selective switches per hour, or they simply need a stable, tunable optical source, the 8160xx family of tunable lasers offers a suitable model.

The 81607A value line tunable laser source complements the top line 81606A model at a more moderate output power. With a typical wavelength repeatability of ±1 pm, even during 200-nm/s two-way sweeps, it is suitable for high-throughput test and automated adjustment of passive optical components.

The 81608A, another member of the value line tunable laser sources, offers more than +12-dBm peak output power, at least 75 dB/nm above its spontaneous emission level.

The 81608A features ±1.5-pm typical wavelength repeatability at two-way sweeps up to 200 nm/s.

The laser’s balance of features, performance and price makes it suitable for both coherent transmission experiments and cost-efficient manufacturing-floor component testing.

The 81609A basic line module can step within 300 milliseconds to discrete wavelengths with 0.1-pm resolution and ±3-pm typical wavelength repeatability, making them ideal for cost-effective testing of broadband optical devices.

Like the other modules in the family, the 81609A delivers more than +12-dBm peak output power with low spontaneous emission levels. At ±0.01-dB power stability over an hour, it can also serve as a static local oscillator with a wide tuning range for receiver testing or transmission experiments.

All members of the tunable laser family are compatible with the current 81600B laser commands and the N7700A photonic application suite, a collection of advanced software tools for making fast and accurate optical measurements, controlling fibre optic instruments and analysing measurement results. This commonality makes it easy for engineers to transition smoothly to the new modules or expand their collections to include the modules.

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