Exfo IQS-2800 Tunable Light Source

The EXFO IQS-2800 is a modular tunable light source built on an external cavity diode laser (ECDL) architecture, delivering narrow-linewidth output across C, L, and A bands. Designed for coherent transmission testing, WDM network emulation, and DWDM component characterization, It has 10 pm tuning resolution, sub-100 kHz instantaneous linewidth, and ±0.1 dB power stability over 24 hours. Output power is available in Standard (13.5 dBm) or High (15.5 dBm) configurations, with <0.5 dB power flatness across the band.

The module integrates into the IQS-636 platform, allowing up to nine units per chassis for multi-wavelength test setups. Frequency tuning supports 25 GHz ITU-grid spacing. Control is via USB or Ethernet, with PM FC/UPC or PM SC/UPC connectors.

Operating range: 5 °C to 45 °C; storage to -40 °C to 70 °C. Laser safety compliance: CFR 1040.10 and IEC 60825-1:2007 Class 1M.

Technical Specifications

• Laser Type: Thermally tuned external cavity diode laser (ECDL)


• Wavelength Bands: C band, L band, A band


• Tuning Resolution: 10 pm


• Linewidth (FWHM, instantaneous): <100 kHz


• Output Power

Standard: 13.5 dBm; High: 15.5 dBm
• Power Stability (24 hours): ±0.1 dB
• Power Flatness over Frequency (BOL): <0.5 dB
• Frequency Step Size (ITU-grid mode): 25 GHz
• Operating Temperature: 5 °C to 45 °C
• Storage Temperature: -40 °C to 70 °C
• Relative Humidity: ≤93 % non-condensing
• Maximum Altitude: 2000 m
• Connectors: PM FC/UPC or PM SC/UPC
• Dimensions: 41 mm (W) × 305 mm (D) × 129 mm (H)
• Weight: 1.7 kg

Key Features

• High spectral purity with <100 kHz linewidth for coherent detection applications


• Fine tuning resolution (10 pm) across extended wavelength coverage


• Excellent power stability and flatness for repeatable measurements


• Multi-band availability accommodates diverse test scenarios

Typical Applications

• Coherent optical transmission testing


• WDM network emulation and validation


• DWDM component characterization

Compatibility & Integration The IQS-2800 module seats within the IQS-636 platform. Up to nine modules can occupy a single chassis, enabling multi-wavelength test configurations within a compact footprint. Remote operation via USB or Ethernet integration with test systems and automated measurement environments.