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TrueWave RS Optical Fiber

TrueWave RS LWP Fiber offers low dispersion slope and low dispersion values that accommodate today’s lower channel counts as well as tomorrow’s full band capabilities. It is an excellent choice for networks that traditionally operate in the C-band (1530 nm – 1565 nm), as well as in emerging L-band (1565 nm – 1625 nm) systems, and also provides transmission capability at 1310 nm.

Compared to standard single-mode and other G.655 fibers, TrueWave RS LWP Fiber offers:

• Low dispersion values and dispersion slope

• Easy, less expensive dispersion compensation

• Low Polarization Mode Dispersion (PMD)

• Low attenuation at the water peak

• Compliance with ITU-T G.655.C and D standards

TrueWave RS LWP Fiber provides this outstanding performance while minimizing total system costs. The fiber’s optimized dispersion values and dispersion slope reduce the need for expensive dispersion compensation for erbium-doped fiber amplified (EDFA) networks in single or DWDM channels. Minimized dispersion compensation enables the use of simplified, less expensive EDFA amplifiers, further reducing overall systems cost.

TrueWave RS LWP Fiber also excels in the Coarse Wavelength Division Multiplexing (CWDM) applications that are popular in metro and regional applications. The fiber’s low and stable attenuation at the water peak opens up the entire wavelength range from 1310 to 1625 nm for transmission. Combined with its low dispersion values in this broad wavelength range, this significantly increases link distances without need for dispersion compensation.

TrueWave RS LWP Fiber offers low dispersion slope and low dispersion values that accommodate today’s lower channel counts as well as tomorrow’s full band capabilities. It is an excellent choice for networks that traditionally operate in the C-band (1530 nm – 1565 nm), as well as in emerging L-band (1565 nm – 1625 nm) systems, and also provides transmission capability at 1310 nm.

Compared to standard single-mode and other G.655 fibers, TrueWave RS LWP Fiber offers:

• Low dispersion values and dispersion slope

• Easy, less expensive dispersion compensation

• Low Polarization Mode Dispersion (PMD)

• Low attenuation at the water peak

• Compliance with ITU-T G.655.C and D standards

TrueWave RS LWP Fiber provides this outstanding performance while minimizing total system costs. The fiber’s optimized dispersion values and dispersion slope reduce the need for expensive dispersion compensation for erbium-doped fiber amplified (EDFA) networks in single or DWDM channels. Minimized dispersion compensation enables the use of simplified, less expensive EDFA amplifiers, further reducing overall systems cost.

TrueWave RS LWP Fiber also excels in the Coarse Wavelength Division Multiplexing (CWDM) applications that are popular in metro and regional applications. The fiber’s low and stable attenuation at the water peak opens up the entire wavelength range from 1310 to 1625 nm for transmission. Combined with its low dispersion values in this broad wavelength range, this significantly increases link distances without need for dispersion compensation.

Features And Benefits 

  • Eliminates dispersion compensation costs for metro networks, providing lowest first channel costs @ 10 Gb/s
  • Enables use of DWDM, CWDM, or a combination of the two
  • Lowers dispersion compensation and amplifier costs for EDFA-amplified long haul networks
  • Offers the lowest dispersion slope over both C-band and L-band wave-length windows to provide similar cost savings over entire C- and L- band channels
  • Provides lowest residual dispersion, an important requirement for fiber in next-generation applications such as OXC-based optical networks

Overview 

Lightera’ TrueWave RS Low Water Peak (LWP) Fiber is a Nonzero Dispersion Fiber (NZDF) that provides exceptional performance for Dense Wavelength Division Multiplexing (DWDM) used in metropolitan, regional, and long haul optical transmission systems.

Product Description 

TrueWave RS LWP Fiber offers low dispersion slope and low dispersion values that accommodate today’s lower channel counts as well as tomorrow’s full band capabilities. It is an excellent choice for networks that traditionally operate in the C-band (1530 nm – 1565 nm), as well as in emerging L-band (1565 nm – 1625 nm) systems, and also provides transmission capability at 1310 nm.

Compared to standard single-mode and other G.655 fibers, TrueWave RS LWP Fiber offers:

• Low dispersion values and dispersion slope

• Easy, less expensive dispersion compensation

• Low Polarization Mode Dispersion (PMD)

• Low attenuation at the water peak

• Compliance with ITU-T G.655.C and D standards

TrueWave RS LWP Fiber provides this outstanding performance while minimizing total system costs. The fiber’s optimized dispersion values and dispersion slope reduce the need for expensive dispersion compensation for erbium-doped fiber amplified (EDFA) networks in single or DWDM channels. Minimized dispersion compensation enables the use of simplified, less expensive EDFA amplifiers, further reducing overall systems cost.

TrueWave RS LWP Fiber also excels in the Coarse Wavelength Division Multiplexing (CWDM) applications that are popular in metro and regional applications. The fiber’s low and stable attenuation at the water peak opens up the entire wavelength range from 1310 to 1625 nm for transmission. Combined with its low dispersion values in this broad wavelength range, this significantly increases link distances without need for dispersion compensation.

 

TrueWave RS Optical Fiber

Low Dispersion Slope 

The low dispersion slope of TrueWave RS LWP Fiber enables more uniform performance across the entire wavelength band for high speed, multi-channel DWDM networks. It also minimizes four wave mixing, which can occur at the lower end of the C-band in NZDFs with high dispersion slope, degrading multichannel DWDM system performance. Because of its low dispersion slope, the minimum dispersion of TrueWave RS LWP Fiber can be increased in this region to better suppress FWM, while keeping the fiber’s maximum dispersion low enough for signals to travel over long distances with minimum need for costly dispersion compensation.

 

TrueWave RS Optical Fiber

Lowest Residual Dispersion 

In a transparent optical network, residual dispersion will accumulate from one node to the next. Lower residual dispersion minimizes the accumulation of dispersion in an OXC network, thereby enabling larger transparent networks with lower total system costs. TrueWave RS LWP Fiber’s low dispersion slope enables better and lower cost dispersion compensation for high-speed regional and metro networks. For example, the cost of dispersion compensating Large Area NZDF fiber can easily be more than 50 percent higher than that of TrueWave RS LWP Fiber.

Lightera is also a leader in dispersion compensation technology. Using Lightera’ commercial dispersion compensation modules, the residual dispersion of TrueWave RS LWP Fiber can be as low as 0.15 ps/ nm/km in both the C- and L-bands, providing longer reach, larger transparent networks and lower system costs.

 

TrueWave RS Optical Fiber

Longer Reach in CWDM Systems 

TrueWave RS LWP Fiber offers one of the industry’s lowest attenuation values at the water peak region. Its typical value of ≤ 0.35 dB/km at 1383 nm is maintained after exposure to hydrogen according to test defined in IEC 60793-2-50.

This highly stable and low water peak, in combination with the low dispersion over the total wavelength range, ensures full-band CWDM transmission (16*10 Gb/s CWDM channels of 20 nm width over a 40 km link). Large cost savings can be realized even when using inexpensive, uncooled 2.5 Gb/s directly modulated lasers modulated at 10 Gb/s.

 

TrueWave RS Optical Fiber

Low and Stable PMD 

Lightera was the first fiber manufacturer to adopt specifications for Polarization Mode Dispersion (PMD) in single-mode fibers. Manufactured using a patented fiber drawing method and extensive process control, TrueWave RS LWP Fiber has a PMD specified at levels much lower than the minimum requirements defined by ITU-T G.655.

At Lightera, we recognize that PMD values depend on the geometrical and mechanical condition of the fiber. Lightera continues to lead the industry in the understanding and minimization of PMD to ensure that today’s fibers will excel with tomorrow’s network.

ITU-T G.655 specifies a maximum PMD link design value of 0.2 ps/√km, which means that transmission link length over 160 km using 40 Gb/s transmission speed can be very complicated and expensive. With the much lower PMD value specified on the TrueWave RS LWP Fiber (0.04 ps/√km), the link length is increased to about 4000 km using the same transmission speed.

Reduced System Cost 

Conventional G.652 single-mode fiber was designed to minimize loss and maximize bandwidth in 1310 nm systems. Its high chromatic dispersion at 1550 nm (approximately 17 ps/nm/km) requires costly dispersion compensation when data rates are above 2.5 Gb/s. However, dispersion compensation fiber normally introduces higher loss, PMD and cost into a system.

TrueWave RS LWP Fiber’s unique fiber design enables a significant reduction in total system cost (including compensation, amplifiers, and even lasers) compared to standard single-mode fiber and other NZDF fibers. Specifically, TrueWave RS LWP Fiber is unique among NZDF fibers in providing both immediate first-cost benefits, flexibility for low-cost capacity upgrade, and capabilities for emerging networks.

 

Product Specifications
Product Description TrueWave RS Optical Fiber
Physical Characteristics
Clad Diameter 125.0 ± 0.7 μm
Clad Non-Circularity ≤ 0.7 %
Core/Clad Concentricity Error (Offset) ≤ 0.5 μm, < 0.2 μm typically
Coating Diameter (Uncolored) 237 – 247 μm
Coating-Clad Concentricity Error (Offset) ≤ 12 μm
Tensile Proof Test 100 kpsi (0.69 GPa)
Coating Strip Force Range: 1.0 N ≤ CSF ≤ 8.9 N
Fiber Curl Radius ≥ 4m
Dynamic Fatigue Parameter (Nd) ≥ 20
Reel Lengths Standard as well as customer specific lengths are available up to 50.4 km
Attenuation Uniformity / Point Discontinuities at 1550 nm ≤ 0.05 dB
Chromatic Dispersion
C-band 1530-1565 nm 2.6 to 6.0 ps/(nm-km)
L-band 1565-1625 nm 4.0 to 8.9 ps/(nm-km)
Dispersion Slope at 1550 nm ≤ 0.05 ps/(nm² -km)
S L Bands 1460 1625 nm -1.0 – 8.9 ps/(nm-km)
Chromatic Dispersion at 1310 nm -8 ps/nm-km (typical)
Group Refractive Index
At 1310 nm 1.471
At 1550 nm 1.470
At 1625 nm 1.470
Mode Field Diameter 8.4 ± 0.6 µm @ 1550 nm
Effective Area 52 µm² (typical) @ 1550 nm
Cable Cut-off Wavelength (λcc) ≤ 1260 nm
Polarization Mode Dispersion (PMD)¹
Fiber PMD Link Design Value (LDV)² ≤ 0.04 ps/√km
Maximum Individual Fiber ≤ 0.1 ps/√km
Typical Fiber LMC PMD ≤ 0.02 ps/√km
Note ¹ As measured with low mode coupling (LMC) technique in fiber form, value may change when cabled. Check with your cable manufacturer for specific PMD limits in cable form.
Note ² The PMD Link Design Value complies with IEC 60794-3, September 2001 (N = 20, Q = 0.01%). Details are described in IEC 61282-3 TR Ed 2, October 2006.

 

Optical Characteristics (after Hydrogen Aging)
Attenuation Maximum Typical
at 1310 nm ≤ 0.4 dB/km ≤ 0.35 dB/km
at 1383 nm ≤ 0.4 dB/km ≤ 0.35 dB/km
at 1550 nm ≤ 0.22 dB/km ≤ 0.20 dB/km
at 1625 nm ≤ 0.24 dB/km ≤ 0.21 dB/km

 

Macrobending Attenuation
The maximum attenuation with bending does not exceed the specified values under the following

 

Environmental Characteristics (at 1310, 1550 & 1625 nm)
Temperature Cycling (-60° to +85 °c) ≤ 0.05 dB/km
High Temperature Aging (85 °c) ≤ 0.05 dB/km
Damp Heat Aging (85 °c and 85% Rh) ≤ 0.05 dB/km
Water Immersion (23 °c) ≤ 0.05 dB/km

Contact Information 

For additional information please contact your sales representative. You can also visit our website at www.lightera.com or call 1-888-FIBERHELP (1-888-342-3743) USA or 1-770-798-5555 outside the USA. For a full list of our certifications, visit our website.

Trademark Notice and Disclaimer 

Lightera reserves the right to make changes to the product(s) described in this document at any time without notice. This document is for informational purposes only and is not intended to modify or supplement any Lightera warranties or specifications relating to any of its products or services.

Doc ID 

fiber-120

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