Dycore has proudly introduced its latest innovation: a 1470nm pluggable semiconductor laser module. This cutting-edge device uniquely integrates a red light coaxial visualization system with an SMA905 fiber-optic pluggable design. At its heart lies Dycore's highly dependable laser chip, meticulously crafted to guarantee stable performance and an extended operational lifespan. This versatile laser source seamlessly adapts to a variety of agricultural smart equipment, offering unparalleled ease of deployment, efficient maintenance, precise operation, and consistent performance. Leveraging advanced laser-based physical weeding technology, it surpasses the limitations of traditional methods, such as pollution, inefficiency, and crop damage, providing a sustainable, intelligent, and scalable precision weeding solution for modern agriculture. This innovation paves the way for a greener and smarter transformation in the agricultural sector.

Application Background

In the contemporary agricultural landscape, green, intelligent, and precision-oriented practices have emerged as the cornerstone of development. Weed management in farmland, a pivotal aspect of crop cultivation, directly influences crop yield and quality. However, prevailing weeding methods are fraught with significant drawbacks and struggle to meet the rigorous demands of precision agriculture. Traditional chemical weeding, over time, can induce weed resistance and contaminate soil and water, disrupting the delicate balance of farmland ecosystems. Manual weeding, while precise, is labor-intensive and inefficient, making it impractical for large-scale operations. Mechanical weeding, though faster, often lacks precision and can inadvertently damage crop seedlings, leading to substantial operational losses. Biological weeding, constrained by environmental factors like temperature, humidity, and climate, exhibits a prolonged effectiveness period and poor stability.

Laser weeding operates on the precise thermal effect of light energy, achieving non-destructive weed eradication. The 1470nm wavelength, a strong absorption band for plant moisture, enables rapid absorption of laser energy by weed stems and leaves, converting it into heat. This process swiftly destroys the weed's cellular structure within milliseconds, ensuring precise and targeted removal from the root. Compared to traditional CO lasers, the 1470nm near-infrared semiconductor laser boasts higher energy efficiency and lower power consumption. Its fiber-coupled design renders the equipment more compact, shock-resistant, and ideally suited for the complex and variable conditions of field environments.

Figure 1: The Operating Principle of Laser Weeding

Development Achievements

Responding to the industry's call for miniaturization, modularity, ease of maintenance, and mass production in laser weeding equipment, Dycore has harnessed its proprietary chip technology to launch the fiber-optic pluggable 1470nm semiconductor laser module. Its compact structure and exceptional shock resistance facilitate rapid integration into various smart field weeding devices, effectively addressing the pain points of traditional laser weeding equipment, such as cumbersome maintenance, poor adaptability, and insufficient stability. This innovation provides a highly reliable, domestically produced core laser source, supporting the widespread adoption of agricultural laser weeding technology and the intelligent transformation of traditional weeding practices.

Figure 2: Fiber-Optic Pluggable 1470nm Semiconductor Laser Module

Product Advantages and Features

Red Light Coaxial Integration

Visualized Precision Weeding

The product features an innovative coaxial design that integrates an indicator red light with the main laser, enabling synchronized and coaxial output. This design allows for intuitive visualization and precise positioning of weed growth points. When combined with a machine vision AI intelligent verification system, it can calibrate the target position in real-time, significantly enhancing the accuracy of laser weeding and eliminating the risk of crop damage from a technical perspective, ensuring both operational precision and crop safety.

Figure 3: Application of Red Indicator Light in Laser Weeding Equipment

Pluggable Fiber Optics

Tool-Free Rapid Maintenance

The module comes equipped with a 400-micron core diameter, NA0.22 industrial fiber optic cable, featuring an SMA905 high-power pluggable fiber interface for effortless "plug-and-play" connectivity. In the event of fiber contamination or damage during field operations, rapid disassembly and replacement can be performed without specialized tools or technicians, significantly reducing equipment downtime and maintenance time. This enhances the continuity and overall efficiency of field operations, meeting the demands of large-scale and routine farmland work.

Highly Reliable Laser Chip

High Stability and Extended Lifespan

The product is powered by Dycore's proprietary laser chip, which has undergone rigorous reliability aging tests. Under continuous aging conditions of 13A/45℃ for 3200 hours, the power decay remained stable within ±10%, with no chip failures, demonstrating exceptional performance stability. Based on test data, the product's lifespan under normal operating conditions at room temperature is estimated to reach 50,000 hours, making it ideal for long-term, high-frequency field operations.

Figure 4: Chip Reliability Verification: Relationship Between Normalized Power and Aging Time

Stable Fiber Plugging Power

Consistent Performance Across Multiple Scenarios

To address the industry challenge of power fluctuations in pluggable structures, the product has undergone specialized optimization. Under standard operating conditions of 250W@25℃ cooling and a locked operating current of 14A, fiber plugging tests show that the output power variation rate remains below 3%, while the nozzle operating temperature is stably controlled below 40℃. Performance remains consistent during plugging operations, ensuring uniform performance across high-temperature, low-temperature, and complex field environments, effectively guaranteeing the stability and consistency of weed removal operations across all areas.

Integrated Electronic Control System

Ensuring Highly Reliable Operation

The 1470nm fiber-coupled module is paired with a customized water-cooled constant-current drive power solution, featuring a two-stage architecture with a front-end AC-DC power supply and a rear-end DC-DC linear constant-current source. This design perfectly matches the module's rated operating current and voltage conditions, providing stable power output for field operations. The front-end AC-DC power supply supports a wide AC input range of 220Vac, with regulated DC voltage output and comprehensive hardware protection against overvoltage, overcurrent, overtemperature, and short circuits. Its water-cooled design adapts to the varying high and low temperatures in field environments. The rear-end DC-DC linear constant-current source supports linear DA analog control, allowing precise adjustment of laser output power via a 0~3V control signal, with a rapid DA response time of 15µs. It supports both continuous and high-frequency pulsed light emission modes, meeting the dynamic energy control needs of AI vision-based weeding.

The electronic control system incorporates CAN bus communication and hardware power-on/off pins, transmitting real-time information on power output current, voltage, module housing temperature, and fault alerts to the vision control system via RS232. This creates a multi-level protection mechanism to prevent laser module overload and burnout from an electrical standpoint. The entire system features a water-cooled design, ensuring stable operation across a wide temperature range of -25℃ to +50℃. The use of conformal coating and fully sealed assembly design makes it suitable for harsh field conditions with humidity and dust, significantly enhancing the reliability of continuous outdoor agricultural equipment operation.

About Dycore

Dycore specializes in the design and manufacturing of high-end laser chips, leveraging its core competitiveness in the upstream sector of the optoelectronic industry chain. With a comprehensive suite of engineering capabilities and mass production capabilities covering compound semiconductor laser chip design, epitaxial growth, device fabrication, chip packaging, testing, reliability verification, and functional modules, Dycore is dedicated to the design, research, and manufacturing of high-performance, high-power, and highly reliable optoelectronic chips and devices. Its products find widespread applications in fields such as optical communications, industrial processing, intelligent sensing, quantum computing, healthcare, and scientific research, aiming to become a globally recognized product development center and manufacturer.