The Photonetics 3613 ITU 33 DFB module is a Distributed Feedback Laser Diode module engineered to deliver stable, single-frequency light output at ITU-grid-aligned wavelengths across the C- and L-bands. Designed for integration with OSICS mainframes, this module provides the wavelength precision and power stability required for optical communications, DWDM systems, and metrology applications.
Technical Specifications
• Wavelength Range: C-band or L-band (ITU-T grid selectable)
• Wavelength Tuning Range: 1.6 nm (1.8 nm typical)
• Wavelength Accuracy: ±0.03 nm
• Wavelength Stability: ±0.005 nm / hour (±0.005 nm / 24 hours typical)
• Optical Output Power: +10 dBm (standard) or +13 dBm (Option P13)
• Optical Power Stability: ±0.01 dB / hour (±0.01 dB / 24 hours typical)
• Spectral Linewidth (FWHM): 40 dB
• Relative Intensity Noise (RIN): > 145 dB/Hz (typical)
• Fiber Type: Polarization Maintaining Fiber (PMF), except 1310 nm modules
• Internal Temperature Control: Equipped for precise thermal management
– Key Features
• DFB technology ensures single longitudinal mode operation and wavelength stability critical for sensitive measurements
• ITU grid compliance enables direct integration into DWDM test systems
• Tight wavelength accuracy (±0.03 nm) and sub-hourly drift specifications (±0.005 nm / hour) support precision optical testing
• Modular architecture allows multi-channel configurations within OSICS platforms
– Typical Applications
• Optical communication system testing
• DWDM system validation
• RF photonic link characterization
• Optical sensing and metrology
• Medical optical systems
– Compatibility & Integration
This module interfaces exclusively with Photonetics OSICS mainframes, enabling multi-wavelength source configurations for advanced test environments.















