120W laser diode for industrial LiDAR

120W laser diode for industrial LiDAR

New Products |
By Nick Flaherty

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Rohm has developed a high-power laser diode for industrial LiDAR equipment and consumer applications requiring distance measurement and spatial recognition.

The Rohm RLD90QZW8 120W infrared laser diode reduces the emission width and the temperature dependence to extend the detection range and resolution of industrial LiDAR designs.

In recent years, LiDAR is being increasingly adopted in a wide range of applications that require automation such as AGVs (Automated Guided Vehicles), robot vacuums, and autonomous vehicles where it is necessary to accurately measure distance and recognize space. There is a need to improve the performance and output of laser diodes when used as light sources to increase detection distance and accuracy.

The design of the RLD90QZW8 reduces the temperature dependence of the laser wavelength by 66% over general products, to just Δ11.6nm (Ave. 0.10nm/°C). This makes it possible to narrow the bandpass filter while extending the detection range of LiDAR.

This follows a 25W laser diode, the RLD90QZW5, in 2019 that was followed by the 75W RLD90QZW3 in 2021.

The 120W laser diode has a uniform light intensity of 97% is achieved over the emission width of 270µm, representing a range of 264µm that contributes to higher resolution. Additional features include high power-to-light conversion efficiency (PCE) for efficient optical output that contributes to lower power consumption in LiDAR applications.

A variety of design support materials necessary for integrating and evaluating the new product is available free of charge on Rohm’s website that facilitate market introduction. In order to drive laser diodes with high nano-second order speed required for LiDAR applications, Rohm has also developed a reference design using the 150V EcoGaN HEMT and BD2311NVX series high speed gate drivers.

A broad range of design data includes SPICE simulation models, board development data, and application notes on drive circuit design necessary for integration and evaluation that supports quick market introduction for industrial and consumer designs.

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