Exfo FLS-2800 – ITLA Tunable Light Source

The EXFO FLS-2800 is an ITLA-based tunable light source delivering precise wavelength control across the full C-band for demanding DWDM and optical network testing. It combines narrow linewidth, high optical power, and exceptional wavelength accuracy to characterize filters, multiplexers, receivers, and photonic integrated circuits in laboratory and field environments.

Technical Specifications

Laser Performance

• Laser Type: ITLA (Integrated Tunable Laser Assembly)


• Tuning Range: Full C-band (1529.16 nm to 1563.05 nm)


• Wavelength Accuracy: ±2.5 pm (typical)


• Wavelength Stability: ±1 pm over 1 hour (after warm-up)


• Linewidth: < 50 kHz typical (-3 dB spectral width)


• Linewidth Stability: < 1 pm/h (typical, after warm-up)


• Tuning Speed: 30 dB (typical)


• Spurious Signals: < -70 dBc (typical)


• RIN: < -150 dBc/Hz (typical, at 10 kHz offset) Control & Interface


• User Interface: Touchscreen display with physical controls


• Remote Control: USB, Ethernet


• Programmable Wavelength Grids: ITU-T grid support (50 GHz, 100 GHz spacing)


• Sweep Modes: Step-sweep, continuous sweep Electrical & Physical


• Power Requirements: 100-240 VAC, 50/60 Hz


• Power Consumption: < 150 W (typical)


• Dimensions: 177 mm H × 430 mm W × 400 mm D


• Weight: Approximately 10 kg


• Operating Temperature: 0 °C to 40 °C


• Storage Temperature: -20 °C to 60 °C


• Operating Humidity: 20% to 80% RH (non-condensing)

Key Features

• Full C-band tuning with ±2.5 pm wavelength accuracy


• Sub-50 kHz linewidth for precise spectral measurements


• Configurable output power (10–13 dBm) with exceptional stability


• Fast wavelength switching (< 5 seconds full sweep)


• Integrated touchscreen and dual-interface remote control

Typical Applications

• DWDM component testing (filters, mux/demux, splitters)


• Optical receiver and amplifier characterization


• Photonic integrated circuit validation


• Network simulation and R&D


• Wavelength calibration and metrology

Compatibility & Integration The FLS-2800 interfaces via USB and Ethernet for automated test systems. Standard fiber optic connectors (FC/APC, SC/APC) enable straightforward integration into existing optical benches and measurement setups.