• DWDM network solution
    SEESUO introduces a DWDM (Dense Wavelength Division Multiplexing)-based optical fiber trunk transmission solution, specifically designed for ultra-long-haul backbone networks, metropolitan core layers, and multi-service aggregation scenarios. This solution utilizes C-band (1525nm-1565nm) and L-band (1570nm-1610nm) expansion technology, supporting 48/96 wavelength channels per fiber with single-wave rates of 10G/100G/200G hybrid transmission, achieving a maximum capacity of 9.6Tbps (96×100G). Leveraging SEESUO FlexGrid™ tunable filtering technology and G.652/G.655 fiber compatibility design, it provides operators with a high-density, low-latency, and easy-to-maintain trunk transmission upgrade solution, meeting the high-reliability demands of 5G backhaul, financial leased lines, and other critical services.
    Project consultation
SOLUTION
网络拓图
SOLUTION ADVANTAGE
  • Ultra-high channel density
    The system adopts 50GHz/100GHz channel spacing, supporting 96 wavelengths per fiber (C+L band). Utilizing SEESUO FlexChassis™ 2U compact chassis for 48-wave deployment, it reduces rack space consumption by 80% compared to traditional CWDM solutions.
  • Ultra-long-haul transmission capability
    Backbone Scenario:1,000km cascaded transmission (with EDFA optical amplifier stations spaced at 80-100km intervals and DCM dispersion compensation modules achieving ±5ps/nm accuracy).Key Specifications:OSNR ≥18dB (100G QPSK), receiver sensitivity -28dBm.
  • Smooth live-network upgrade
    Compatible with existing SDH/OTN equipment (e.g., Huawei OSN series, ZTE ZXMP series) for hybrid transmission. The SEESUO TransPod™ wavelength converter enables compatibility between 10G/40G non-coherent signals and DWDM systems.
  • Deployment costs reduced by 30%
    The 2U chassis supports 48 wavelengths (traditional solutions require 4U).Pre-configured wavelength templates reduce testing labor by 30%.Optical module power consumption <4W/100G (industry average: 5.5W).
TECHNICAL POINTS
  • C/L Band Expansion and Channel Spacing Control
    Implements ITU-T G.694.1 standard wavelength planning, with bidirectional interleaved multiplexing to enhance spectral efficiency. Anritsu MS9740B optical spectrum analyzer ensures wavelength offset calibration (±0.05nm) to prevent adjacent channel crosstalk.
  • Precision Dispersion Compensation Deployment
    Tailored compensation solutions for G.652/G.655 fiber differences. SEESUO DCM-1360 modules and TDCM dynamic compensation modules are deployed every 80km to achieve residual dispersion ≤±100ps/nm.
  • Multi-Vendor Equipment Hybrid Networking
    Achieves interoperability between heterogeneous devices through optical layer decoupling technology. VOAs (attenuation range 0-20dB) are installed at third-party optical module outputs to ensure consistent fiber input power.
  • Optical Fiber Physical Layer Reliability Design
    Compliant with YD 5102-2010 optical cable construction standards, the backbone layer utilizes GYTA53 double-armored cables (tensile resistance ≥2400N). Heat-shrink sleeves and stainless steel brackets secure the cables, with each cable reel reserving sufficient length for two fusion splices.
  • Wavelength Planning Methodology
    Adopts metropolitan-standard planning (48-wave system) with odd/even wave staggered 50GHz spacing and 100GHz internal spacing. Reserves 1530nm/1550nm as dedicated OTDR test wavelengths.
  • Standardized Installation & Commissioning Procedures
    Fiber Termination: Uses 24-core ribbon pigtails for ODF rack fusion splicing. Equipment Installation: Maintains ≥0.5m clearance between MUX/EDFA and ODF racks to ensure thermal dissipation. Power Equalization: Calibrated with AQ6317B optical spectrum analyzer.
RELEVANT PRODUCTS
  • 1.25G Dual Fiber SFP

    Wavelength：850nm,1310nm, 1550nm

    Distance：550m,2km,10km,20km,40km,80km,120km,Customized

    Port Type：LC Port

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    • Dual data-rate of 1.25Gbps/1.063Gbps operation
    • 850nm VCSEL laser transmitter and PIN photo detector for 550m transmission
    • 1310nm FP laser transmitter and PIN photodetector for 10km/20km transmission
    • 1550nm DFB laser transmitter and PIN photo detector for 80km transmission
    • 1550nm DFB laser transmitter and APD photo detector for 120km transmission
    • Compliant with SFP MSA and SFF-8472 with duplex LC receptacle
    • Hot-Pluggable
    • Digital Diagnostic Monitoring
    • Compatible with SONET OC-24-LR-1
    • Compatible with RoHS
    • +3.3V single power supply
    • Operating case temperature: Standard:  0 to +70°C
  • 1.25G BiDi SFP

    Wavelength：Tx1310nm/Rx1550nm, Tx1550nm/Rx1310nm,Tx1490nm/Rx1550nm,Tx1550nm/Rx1490nm, Tx1310nm/Rx1490nm,Tx1490nm/Rx1310nm

    Distance：2km,10km,20km,40km,80km,120km,Customized

    Port Type：LC Port, SC Port

    Learn more
    • Dual data-rate of 1.25Gbps/1.063Gbps operation
    • 1310nm FP laser transmitter and 1550nm PIN photo-detector for 10/20km transmission
      1310nm DFP laser transmitter and 1550nm PIN photo-detector for 40km transmission
      1550nm DFB laser transmitter and 1310nm PIN photo detector for10/20/40km transmission
      1490nm DFB laser transmitter and 1550nm APD photo detector for 80km/120km transmission
      1550nm DFB laser transmitter and 1490nm APD photo detector for 80km/120km transmission
    • Compliant with SFP MSA and SFF-8472
    • Hot-Pluggable
    • Digital Diagnostic Monitoring
    • Compatible with SONET OC-24-LR-1
    • Compatible with RoHS
    • +3.3V single power supply
    • Operating case temperature: Standard:  0 to +70°C
  • 2.5G Dual Fiber SFP

    Wavelength：850nm,1310nm, 1550nm

    Distance：550m,2km,10km,20km,40km,80km,120km,Customized

    Port Type：LC Port

    Learn more
    • Up to 2.67Gb/s Data Links
    • 850nm VCSEL laser transmitter for 300m transmission
    • 1310nm FB laser transmitter for 10km/20km transmission
    • 1310nm DFB laser transmitter for 40km transmission
    • 1550nm DFB laser transmitter for 40km/80km/120km transmission
    • Compliant with SFP MSA and SFF-8472 with duplex LC receptacle
    • Hot-Pluggable
    • Digital Diagnostic Monitoring
    • Compatible with RoHS
    • +3.3V single power supply
    • Operating case temperature: Standard:  0 to +70°C
  • 2.5G BiDi SFP

    Wavelength：Tx1310nm/Rx1550nm, Tx1550nm/Rx1310nm,Tx1490nm/Rx1550nm,Tx1550nm/Rx1490nm, Tx1310nm/Rx1490nm,Tx1490nm/Rx1310nm

    Distance：2km,10km,20km,40km,80km,120km,Customized

    Port Type：LC Port

    Learn more
    • Up to 2.67Gb/s Data Links
    • 1310nm FP laser transmitter and 1550nm PIN photo-detector for 10/20km transmission
    • 1310nm DFP laser transmitter and 1550nm PIN photo-detector for 40km transmission
    • 1550nm DFB laser transmitter and 1310nm PIN photo detector for10/20/40km transmission
    • 1490nm DFB laser transmitter and 1550nm APD photo detector for 80km/120km transmission
    • 1550nm DFB laser transmitter and 1490nm APD photo detector for 80km/120km transmission
    • Compliant with SFP MSA and SFF-8472
    • Hot-Pluggable
    • Digital Diagnostic Monitoring
    • Compatible with RoHS
    • +3.3V single power supply
    • Operating case temperature: Standard:  0 to +70°C
OUR CASE
ISP FTTX Date center School
OUR TEAM
SEESUO combines professional knowledge with innovation to provide tailored technical support and advanced solutions for clients, meeting their needs and ensuring precision in network design, system optimization, and troubleshooting. The technical team at SEESUO consistently stays at the forefront of technology.
  • The DWDM (Dense Wavelength Division Multiplexing) solution for optical fiber trunk transmission is a multi-faceted strategy that requires holistic consideration of multiple dimensions including fiber resources, equipment selection, wavelength planning, transmission performance, network management, and system reliability.
Field Survey and Planning for Existing Networks
The SEESUO team conducted optical fiber cable testing using JDSU MTS-8000 to measure end-to-end loss, chromatic dispersion, and PMD. Key inspections included live connectors (IL ≤ 0.3dB) and bend loss (radius > 30mm). Subsequently, they performed a one-to-one analysis of actual service requirements to finalize the optimal fiber replacement solution.

Hardware Deployment
The field team performs rack installation, deploying equipment at 'optical amplifier station - electrical repeater station' intervals (every 80km in metro networks, every 50km in backbone networks) to ensure compliant deployment locations and fiber routing. The wavelength allocation plan is confirmed with the customer's transmission team. ODF rack → MUX input port: Uses φ3.0mm armored patch cords with a bend radius >5cm. Inter-device connections: MPO-12 pre-terminated trunk system (insertion loss ≤0.5dB).

Phased Service Migration
The customer's network department and SEESUO technical experts formed a joint working group to implement the "three-phase cutover method". Priority was given to loading wavelengths in low-loss windows such as 1530nm/1550nm. After every 8 wavelengths were loaded, an OSNR test was conducted. The SEESUO team provided on-site support with continuous 24-hour bit error rate monitoring.

Establish a long-term operation and maintenance mechanism
The core network expert team conducts monthly remote quality analysis meetings and provides quarterly inspection services. Based on the quarterly operational reports from the FiberInsight® system (including optical power degradation trends and dispersion compensation margins), they dynamically adjust maintenance strategies.

CONSULTATION PROCESS
01
Demand consultation
Describe business needs and submit demand consultation
02
Initial communication
Answer questions about needs, align core demands, and determine cooperation intentions
03
Solution Exchange
Conduct online or offline discussions on relevant plans
04
Business Process
After the plan is finalized, the business process begins
TECHNICAL SUPPORT
Get solutions or consultation from the technical team.
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