Quick wins for a faster PC:
Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Clear out junk files and repair common Windows errorsFree Scan →Scan for outdated or missing drivers - takes under a minuteDriver Scan →iTechGuides is reader-supported. When you buy through links on our site, we may earn an affiliate commission. As an Amazon Associate I earn from qualifying purchases. Learn more
ROHM’s RLD8BQAB3 is a pulsed infrared laser-diode array designed for LiDAR. Its eight channels are rated at 125W typical optical output apiece, giving a combined peak optical power of 1kW when operated together. That is a peak figure under specified pulse conditions—not a continuous 1kW output.
What the RLD8BQAB3 is—and what “1kW” means
ROHM announced the RLD8BQAB3 on January 7, 2025, as a surface-mount, high-power infrared laser diode for LiDAR systems using 3D time-of-flight (ToF) measurement. The device uses eight laser channels. ROHM says the channels can operate individually or together; all eight together can produce 1kW peak optical power. ROHM’s announcement and its product specifications describe the device.
The 1kW figure is the combined peak output, not a continuous-wave rating. ROHM lists 125W typical optical output and a 150W maximum optical-output rating per channel. Its typical measurement conditions are 41A current, 100ns pulse width and 0.01% duty. Those conditions matter when comparing the part with another emitter: a headline wattage without pulse width, duty cycle and channel configuration is not an apples-to-apples comparison.
Recommended Free Tools
Wavelength and specifications
| Specification | ROHM-listed value |
|---|---|
| Peak wavelength | 905nm |
| Channels | Eight; common-cathode wiring allows individual-channel or simultaneous operation |
| Typical optical output | 125W per channel |
| Maximum optical-output rating | 150W per channel |
| Combined peak optical power | 1kW when all eight channels operate together |
| Typical measurement conditions | 41A, 100ns pulse width, 0.01% duty |
| Emission area | 300 × 10µm |
| Package size | 5.6 × 3.3mm; 1.75mm thick |
| Wavelength temperature dependence | 0.1nm/°C, as reported by ROHM |
ROHM compares the 0.1nm/°C wavelength temperature dependence with approximately 0.26–0.28nm/°C for standard products. The company says this stability can help maintain LiDAR performance as operating temperature changes. The comparison is ROHM’s; system performance still depends on the complete optical and electronic design. See the RLD8BQAB3 product page for the listed characteristics.
#1 Best Overall
- 905nm Pluse 25W 50W 75W 100W 150W 200W Diode 5.6mm TO18
How its package and channel arrangement work
The package combines eight emission areas with a high-heat-dissipation substrate, submount and clear-glass cap. ROHM says the clear-glass cap avoids scattering associated with dicing scratches in resin encapsulation and describes it as an industry-first feature for a surface-mount laser diode. Each of the eight emission areas is 300µm wide. The product is wired with a common cathode, allowing a system designer to fire channels individually or operate all eight together, subject to the drive and thermal design.
These design features address integration needs, but they do not by themselves establish that a board or optical assembly can safely handle the device’s peak output. Developers need to confirm the appropriate drive electronics, heat path, optics, pulse control and optical safety measures for their particular system.
Rank #2
- Output Power 500mw
- Wavelength 808nm
- Working Voltage 2.2VDC
- Working Current 400mA
- Working Temperature -10 ~40degree
Intended LiDAR applications
The RLD8BQAB3 is intended as an illumination source for pulsed LiDAR, which measures distance and supports spatial recognition. ROHM identifies possible systems across consumer, industrial and automotive-related uses:
Do these 3 things before closing this tab:
1Clear out junk files and repair common Windows errors2Scan for outdated or missing drivers - takes under a minute3Repair Windows errors before they cause bigger problems- Automotive advanced driver-assistance systems (ADAS)
- Drones
- Robot vacuum cleaners
- Automated guided vehicles (AGVs)
- Service robots
- 3D monitoring equipment
ROHM’s laser-diode lineup also describes LiDAR and SLAM applications including ADAS, robot vacuums and service robots. The announcement says a bandpass filter can reduce sunlight and other ambient-light noise, supporting longer-range and higher-definition LiDAR detection. That is a system-level benefit to evaluate with the receiver, optics, filtering and environment—not a guaranteed range or resolution figure for the diode alone.
Rank #3
- 905nm Pluse 25W 50W 75W 100W 150W 200W Diode 5.6mm TO18
What to compare before choosing a LiDAR emitter
The RLD8BQAB3’s combined peak power is only one comparison point. When evaluating it against another emitter, check the specifications and integration status that determine whether it fits the intended system:
- Output and pulse conditions: Compare peak optical power alongside pulse width, duty cycle, current and whether power is stated per channel or for the complete array.
- Channel control: Determine whether the system needs individual emitters, simultaneous firing or a different firing sequence; the RLD8BQAB3 supports individual or all-channel operation through its common-cathode arrangement.
- Wavelength behavior: Check nominal wavelength and its change with temperature, then assess compatibility with the receiver and any optical filters.
- Beam and optical design: Confirm beam quality, emitter arrangement and optical requirements against the target range, field of view and receiver. The cited ROHM material does not establish a complete system beam or range specification.
- Thermal and package constraints: Assess the heat path, board layout and space available for a 5.6 × 3.3mm, 1.75mm-thick package.
- Safety and qualification: Establish eye-safety controls, applicable regulatory requirements and the qualification status needed for the end product. Do not infer these from the output rating or manufacturing information alone.
- Supply and lifecycle: Confirm current samples, production availability, lead time, regional sales coverage and any required automotive qualification directly with ROHM.
Availability and automotive qualification
ROHM’s January 7, 2025 announcement said samples had been available since August 2024 through a ROHM sales representative or the company’s inquiry route. It does not establish current stock, lead time, geographic availability or a retail purchasing channel, so prospective integrators should confirm those details with ROHM. The announcement’s inquiry route is the cited contact path.
Rank #4
- 905nm Pluse 25W 50W 75W 100W 150W 200W Diode 5.6mm TO18
ROHM’s Japanese announcement stated that front-end production processing is performed at ROHM and back-end processing at ROHM Wako, both with IATF 16949 certification. It also said preparation for automotive AEC-Q102 compliance was under way for fiscal 2024. That dated statement is not confirmation that the RLD8BQAB3 currently holds AEC-Q102 qualification; automotive teams should ask ROHM for current, product-specific qualification documentation. See ROHM’s Japanese announcement.
Quick Recap
Best Value
- TO-5.6mm 905nm Pulse 200W Diode
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
