The part number **47LPQ-00BG-R** refers to a high-performance **Pulsed Laser Diode (PLD)** module, typically manufactured by companies like **Excelitas Technologies**. These components are specifically engineered for applications requiring high-intensity, short-duration light pulses. --- ### 1. Technical Specifications Below are the typical technical characteristics associated with this series of laser diodes: | Feature | Specification | | :--- | :--- | | **Technology** | Multi-junction Pulsed Laser Diode | | **Peak Wavelength** | ~905 nm (Near-Infrared) | | **Peak Power Output** | High (often ranging from 70W to 100W+ depending on drive current) | | **Configuration** | Stacked / Quad-junction | | **Package Type** | Low-profile, surface mount or specialized cavity | | **Duty Cycle** | Low (typically < 0.1%) | | **RoHS Status** | Compliant (indicated by the "-R" suffix) | --- ### 2. Key Electronic Features * **Multi-Junction Stack:** The "47" series often utilizes a multi-epi-layer structure. This allows the diode to emit significantly higher peak power from a small aperture compared to single-junction lasers. * **Efficiency:** Designed for high "wall-plug" efficiency, converting electrical pulses into optical energy with minimal heat dissipation during the pulse. * **Response Time:** Optimized for nanosecond (ns) pulse widths, which is critical for precision distance measurement. --- ### 3. Application Areas These parts are industrial/automotive grade and are commonly found in: 1. **LiDAR Systems:** Used in autonomous vehicles and drones for 3D mapping and obstacle detection. 2. **Range Finding:** Professional-grade laser rangefinders for surveying and military use. 3. **Adaptive Cruise Control:** Integrated into vehicle safety systems to monitor the distance to the car ahead. 4. **Industrial Sensing:** High-speed object detection and safety light curtains. --- ### 4. Circuit Implementation Notes To operate this part effectively, the following electronic considerations are necessary: * **High Current Driver:** Requires a specialized MOSFET-based driver capable of delivering high peak currents (e.g., 20A - 40A) for very short durations (e.g., 1ns to 100ns). * **Heat Dissipation:** While the average power is low, the instantaneous heat at the junction is high. Proper PCB thermal management is required. * **Safety:** As a Class 3B or Class 4 laser (depending on optics), eye safety regulations (IEC 60825-1) must be followed during circuit design.