Innovative Breakthrough | Pluggable Fiber-Coupled 1470 nm Laser Source: Pioneering a New Paradigm for Precision Laser Weeding
Product Summary
DoGain has newly launched an independently developed pluggable fiber-coupled 1470 nm semiconductor laser module. Innovatively integrating a coaxial visible red light positioning design with an SMA905 pluggable fiber structure, the product is equipped with DoGain’s high-reliability in-house laser chips at its core to guarantee superior long-term performance stability and extended service life from the chip level.
Flexibly compatible with a full spectrum of intelligent agricultural equipment, this laser source features easy field deployment, streamlined maintenance, pinpoint operation and consistent performance. Leveraging cutting-edge laser-based thermal weeding technology, it overcomes critical drawbacks inherent to conventional weed control approaches including chemical contamination, low working efficiency and unintended crop damage. The module delivers an eco-friendly, low-carbon, smart and scalable precision weeding solution for modern agriculture, driving the green and intelligent transformation of precision farming.
Green development, intelligent operation and precision management have evolved into core development trends for contemporary agriculture. As a fundamental part of field crop management, farmland weed control directly determines crop yield and produce quality. Currently, mainstream weeding methods all carry prominent limitations that fail to meet the evolving demands of precision agriculture:
Long-term chemical herbicide application triggers weed pesticide resistance, leaves persistent chemical residues in soil and water bodies, and damages farmland ecological environments; manual weeding suffers from excessive labor costs and poor efficiency, making it infeasible for large-scale farm cultivation; mechanical weeding lacks positional accuracy and frequently injures young crop seedlings with high operational losses; biological weeding is highly susceptible to ambient temperature, humidity and climatic fluctuations, featuring slow efficacy and unstable performance.
Laser weeding functions based on targeted photothermal effects to eradicate weeds in an environmentally benign manner. The 1470 nm wavelength falls within the strong water absorption band of plant tissues: laser energy at this band is rapidly absorbed by intracellular moisture within weed stems and leaves and converted into thermal energy, destroying weed cell structures within milliseconds to achieve thorough targeted weed mortality with outstanding targeting precision.
Compared with conventional CO₂ lasers, 1470 nm near-infrared semiconductor lasers boast higher energy conversion efficiency and lower overall power consumption. Benefiting from integrated fiber-coupled packaging, the laser unit features a compact footprint and robust shock resistance, perfectly adapting to the complex and volatile working conditions in open farm fields.
R&D Achievements of the Product
To address the industry’s core demands for miniaturized, modular, easy-to-maintain and mass-producible laser weeding equipment, DoGain has developed the pluggable fiber-coupled 1470 nm semiconductor laser module drawing on its accumulated proprietary chip development expertise. Characterized by compact mechanical layout and superior shock resistance, the module enables rapid integration with diverse intelligent field weeding machinery, resolving persistent pain points of traditional laser weeding devices such as cumbersome maintenance, poor equipment compatibility and inadequate operational stability. It serves as a domestically sourced, high-reliability core laser component for large-scale commercialization of agricultural laser weeding and intelligent upgrading of legacy weed management practices.
Core Product Advantages & Specifications
1. Coaxial Red Indicator for Visualized Precision Weeding
The module adopts an integrated coaxial design combining red aiming indicator and primary working laser, with synchronous coaxial output of positioning light and operational laser beam. Operators can visually pinpoint weed locations on-site. When paired with an AI machine vision calibration system, the setup enables real-time target coordinate correction, drastically boosting laser weeding hit rates and eliminating accidental crop damage from the source, balancing ultra-high working precision and crop safety.
2.Plug-and-Play Fiber Design Enables Tool-Free Quick Maintenance
Factory-fitted with industrial optical fiber featuring 400 μm core diameter and 0.22 numerical aperture (NA), the module is outfitted with a high-power SMA905 pluggable fiber connector supporting instant plug-and-play fiber connection. In field operations, contaminated or damaged fiber cables can be replaced rapidly without specialized tools or professional technicians, minimizing equipment downtime, improving continuous field operation efficiency and satisfying the requirements of regular large-scale agricultural weeding.
3.In-House High-Reliability Laser Chip Ensures Stable Performance and Extended Lifespan
Powered by DoGain’s self-developed laser chips that have passed stringent accelerated reliability aging validation. Under test conditions of 13 A operating current and 45 ℃ ambient temperature, continuous 3200-hour aging testing yields power fluctuation confined within ±10% with zero chip failure, verifying exceptional operational stability. Extrapolated from test data, the module achieves an expected service life of up to 50,000 hours under standard ambient working conditions, supporting long-duration high-frequency continuous field operations.
4. Minimal Power Variation upon Fiber Reconnection Ensures Consistent Performance Across Scenarios
Specially optimized to mitigate power drift commonly seen in pluggable laser structures. Under standardized operating parameters (250 W output at 25 ℃ with liquid cooling and fixed 14 A operating current), repeated fiber plug/unplug testing restricts output power variation below 3% while maintaining nozzle operating temperature under 40 ℃. Stable performance is retained throughout repeated fiber disassembly and assembly, delivering uniform weeding performance across wide temperature ranges and diverse rugged field environments to guarantee consistent full-area weed removal.
5. Integrated Electronic Control System Safeguards Reliable Continuous Operation
The 1470 nm fiber-coupled laser module is matched with a customized water-cooled constant-current drive power supply built on a two-stage power architecture: front-end AC-DC conversion plus back-end DC-DC linear constant-current source, precisely matching the module’s rated voltage and current parameters for steady power supply in field environments.
The front-end AC-DC unit accepts wide-range 220 Vac alternating current input and outputs regulated direct current, with comprehensive hardware protection against overvoltage, overcurrent, overtemperature and short-circuit faults; its liquid cooling structure accommodates drastic ambient temperature swings on farmland. The back-end DC-DC linear constant-current source supports linear DA analog power regulation via a 0~3 V control signal with a minimum DA response time of 15 μs, enabling continuous-wave and high-frequency pulsed laser emission to meet dynamic power-adjustable weeding requirements driven by AI vision systems.
Embedded with CAN bus communication and hardware on/off pins, the electronic control system transmits real-time operational data including output current, voltage, module housing temperature and fault alarms to the vision control system via RS232 communication, establishing multi-level protection to prevent laser module burnout caused by electrical overload. Equipped with liquid cooling circulation, the unit reliably functions across an extensive operating temperature range from -25 ℃ to +50 ℃. Conformal coating and fully sealed mechanical assembly are implemented to withstand humid, dusty harsh field conditions and substantially improve the continuous working reliability of outdoor agricultural laser equipment.
