N7774C Ultra-High Power Tunable Laser

The Keysight N7774C Ultra-High Power Tunable Laser provides the highest output power in the N777-C Family of Tunable Laser Sources. It is particularly suitable for use with test configurations that require splitting a signal power between optical paths that lead to multiple devices under test (DUT), or with complex test setups that need to deal with a large loss budget.

Two wavelength options cover the optical O-band (Option A13), typically used by transceivers for the datacenter infrastructure, and the CL-band (Option A16), typically used for long-distance links. Option A13 offers a tuning range from 1260 nm to 1350 nm with an output power of min. +22 dBm, peaking at +24 dBm. The output power is adjustable over a wide range, reaching –10 dBm.

Option A16, which will become available at the beginning of 2027, features a tuning range from 1520 nm to 1620 nm with min. +17 dBm output power, peak power of +20 dBm, and is adjustable to –5 dBm. Equipped with PMF output fiber, the N7774C is a perfect match for testing and developing components with Silicon Photonics/ integrated photonics technology.

All N777-C models are based on a common cavity and laser module design and share a narrow linewidth, excellent long-term stability and low spontaneous emission level. N7774C extends this cavity design by an amplified output path. Compared to cavities where the back facet of the gain chip is used to provide high power, this design ensures the output power stays high across the full tuning range. The N7774C belongs to the Top Line models of the tunable laser family and shares the leading-edge tuning and wavelength accuracy with the N7776C.

The N7774C can perform two-way sweeps with up to 200 nm/s to accelerate wavelength-dependent alignment processes and the automated calibration of wavelength-selective devices. The dynamic specifications for swept operation apply in both directions, independent from the sweep speed.

The new enhanced fine-tuning provides wavelength adjustment without overshooting. Automatic coordination of the motor and piezoelectric actuator ensures smooth tuning with 0.1 pm resolution, simplifying wavelength-optimization procedures. The N7774C is supported by the N7700100C photonic application software suite for spectral measurements of insertion loss, polarization dependent loss and polarization mode dispersion in combination with Keysight power meters and polarization instruments.