N7778C Tunable Laser Source, High Power and Low SSE

• Wavelength: 1240-1380 nm or 1340-1495 nm or 1450-1650 nm or 1490-1640 nm
• Sweep speeds: up to 200 nm/s, bidirectional
• Max. power: > +12 dBm peak typ. (Options 114, 116, 216) or > +13 dBm peak typ. (Option 113)
• New: extra-high power option with > 18 dBm peak (Option 013)
• Signal to SSE ratio: ≥ 75 dB/nm typical (≥ 50 dB/nm typical for Option 013)
• Absolute wavelength accuracy: ±5 pm static, ±10 pm sweeping typical

The N7778C value line tunable laser source offers a peak output power of more than +12 dBm, at least 75 dB/nm above its spontaneous emission level. It features a typical wavelength repeatability of ±1.5 pm at two-way sweeps up to 200 nm/s. The N7778C’s balance of features, performance and price makes it suitable for cost-effective, high-throughput manufacturing-floor component testing as well as for coherent transmission experiments.

The new option 013 is a particularly good match for testing and developing components with Silicon Photonics/ integrated photonics technology. Verifying the spectral responsivity and the sensitivity of receiver optical subassemblies (ROSA) for Ethernet benefit from more than +16 dBm output power across 1290 nm to 1340 nm - enough to allow for external modulation in BER testing.

The wavelength tuning performance has been enhanced to provide default fine tuning without overshoot. No separate fine-tuning control is needed for smooth tuning with 0.1 pm resolution, due to automatic coordination of the motor and piezoelectric-actuator. This simplifies wavelength-optimization procedures.

Like its predecessors 81600B and 81608A, the new N7778C tunable laser source is supported by the photonic application suite software for spectral measurements of insertion loss, polarization dependent loss and dispersion. In combination with the N774xC multiport power meters and the N7786C polarization synthesizer, the new lasers provide optimal swept-wavelength accuracy and excellent dynamic range for measuring both filter stop bands and pass bands.

All N777xC tunable lasers are based on a common cavity and laser module design and share a narrow linewidth, excellent long-term stability and low spontaneous emission level. They are software compatible with the 8160xA and 81600B lasers, the industry standards for more than a decade, but occupy 1 height unit less rack space. The remote user interface on the instrument is accessible with just a web browser, either via LAN or via USB connection. An optional touch-screen display provides local operator access and displays current operating parameters.

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