Corning MetroCore Optical Bare Fiber 2669 (T M ) / 2km

The Corning MetroCore Optical Bare Fiber 2669 is a 2 km spool of non-zero dispersion-shifted single-mode fiber engineered for short-haul metropolitan networks operating at 2.5 Gbps and 10 Gbps. Its moderate negative dispersion of approximately -8 ps/(nm•km) at 1550 nm compensates for positive frequency chirp in directly modulated lasers, enabling extended transmission reach without discrete dispersion compensation modules. Low attenuation across the C-band and L-band, combined with minimal polarization mode dispersion, supports dense WDM deployments and cost-effective DM-DFB laser implementations.

– Technical Specifications

• Fiber Type: Non-zero dispersion-shifted fiber (NZDSF)
• Nominal Length: 2 km spool
• Attenuation: ≤0.50 dB/km at 1310 nm; ≤0.25 dB/km at 1550 nm; ≤0.25 dB/km at 1605 nm
• Attenuation (Water Peak): ≤0.40 dB/km at 1383 ± 3 nm
• Total Dispersion: -10.0 to -1.0 ps/(nm•km) over 1530 to 1605 nm
• Dispersion at 1550 nm: Approximately -8 ps/(nm•km)
• Mode-Field Diameter (1550 nm): 7.60 µm to 8.60 µm
• Cable Cutoff Wavelength: ≤1260 nm
• Point Discontinuity: ≤0.10 dB at 1310 nm or 1550 nm
• PMD Link Value: ≤0.1 ps/√km
• PMD (Maximum Individual Fiber): ≤0.2 ps/√km
• Operating Temperature (Cabled Fiber): -40 °C to +70 °C
• Proof Test: Entire fiber length subjected to proof testing

– Key Features

• Negative dispersion enables directly modulated laser operation without external compensation
• Low PMD supports high-speed DWDM systems with minimal pulse broadening
• Proof-tested fiber ensures reliability in critical network applications

– Typical Applications

• Metro network validation and system characterization
• Signal latency and transmission performance testing
• Fiber splicing and laboratory operations
• Dense wavelength division multiplexing (DWDM) deployments

– Compatibility & Integration

• Supports 2.5 Gbps and 10 Gbps transmission rates
• Optimized for directly modulated DM-DFB laser sources
• Effective across C-band (1530–1565 nm) and L-band (1565–1605 nm) wavelengths
• Recipient of the 2000 Photonics Circle of Excellence Award