77F-LT1300 1550nm CATV Optical Transmitter 3-10dBm DFB Laser for FTTH HFC

• Alternative Names: 1550nm CATV Transmitter, Internal Modulation 1550nm Transmitter, DFB Laser Transmitter, Long Distance CATV Transmitter, EDFA Compatible Transmitter, HFC Optical Transmitter
• Main Applications: Long-distance CATV trunk transmission, large-scale FTTH CATV coverage, combined with EDFA for multi-point distribution, digital TV backbone network, county-level CATV network
• Core Highlights: Internationally renowned 1550nm DFB laser, superior C/CSO performance (≥70dB), compatible with all mainstream EDFAs, 32-bit ARM control, ATC/APC stabilization, modular design, SNMP management, dual hot-swappable power supply

The 77F-LT1300-5 series is a high-performance 1550nm internal modulation optical transmitter independently developed by Shandong Wanshuo Optoelectronic. Specially designed for long-distance CATV transmission and large-scale FTTH deployment, it converts RF TV signals into 1550nm optical signals, which can be amplified by EDFAs for multi-point distribution, making it the ideal choice for county-level and city-level CATV backbone networks.

Adopting internationally renowned high-performance 1550nm DFB lasers, it delivers excellent linearity and stability. Equipped with advanced multi-frequency RF predistortion technology, it achieves industry-leading C/CSO performance of ≥70dB, ensuring clear and stable TV signal transmission even after multi-stage EDFA amplification. The built-in 32-bit ARM processor efficiently coordinates all modules and precisely monitors operating parameters in real time.

The device integrates laser temperature stabilization (ATC) and optical power stabilization (APC) circuits to ensure long-term stable operation. It adopts a standard 19-inch 1U rack-mount structure with a dual-module design, supporting expansion with additional transmitters, EDFAs or optical receivers. It supports dual hot-swappable power supplies (AC 90-264V / DC 36-72V optional) with snap-on fixation for easy maintenance. With a complete SNMP network management interface, it supports remote monitoring and control, greatly improving operation and maintenance efficiency.

• Long-distance CATV trunk network transmission
• Large-scale FTTH CATV service deployment
• Combined with EDFA for multi-point signal distribution
• County-level and city-level CATV backbone networks
• Digital TV and HDTV signal transmission
• Hotel and commercial building long-distance TV signal reception
• Cross-regional CATV network interconnection

1. Superior 1550nm DFB Laser: Internationally renowned brand, excellent linearity, compatible with all mainstream EDFAs
2. Industry-Leading C/CSO: ≥70dB C/CSO performance, ensures signal quality after multi-stage amplification
3. Advanced Predistortion Technology: Multi-frequency RF predistortion optimizes all transmission parameters
4. Intelligent Control: 32-bit ARM processor, real-time monitoring and automatic adjustment
5. Dual Stabilization Circuits: ATC and APC circuits ensure long-term stable operation
6. Modular Expandable Design: Dual-slot structure supports EDFA and receiver expansion
7. Dual Hot-Swappable Power Supply: AC/DC optional, online replacement without service interruption
8. Comprehensive Network Management: SNMP protocol support for remote monitoring and control