ER900 1535nm 900µJ Eye-Safe Laser for Ultra-Long-Range LiDAR and Rangefinders

TECHNICAL SPECIFICATIONS

OUTLINE DIMENSION

Figure 1 Outline Dimensions (mm)

Operating Instructions

1. Match the laser driver to the ER900 laser.
   The laser driver power supply must be properly matched to the laser.
   The typical load voltage of the ER900 is < 2 V, with an operating current of 30 A, pulse width < 3 ms, and a repetition rate of 5 Hz. For the exact operating parameters, please refer to the attached factory test report. The laser driver power supply must meet these requirements; otherwise, the laser may fail to operate properly or could be overloaded and permanently damaged. Therefore, before wiring, carefully check the laser specification sheet and confirm that the laser is compatible with the selected driver.

2. Always disconnect power before wiring.
   Before making any connections, make sure the power is switched off and completely isolated. During wiring, carefully check the positive and negative terminals of the laser and ensure correct polarity. After the wiring is completed, perform a thorough inspection to confirm that all connections are correct, in order to avoid short circuits, reverse polarity, and other faults. At the same time, make sure all terminals are firmly secured to prevent poor contact due to loose wiring.

3. Set operating parameters according to the factory test report.
   After confirming that the wiring is correct, set the corresponding parameters on the driver according to the attached factory test report. Once the parameters are correctly set, turn on the driver; the laser should then operate normally.

4. Keep the laser output window clean.
   Take care to keep the laser output window clean and do not touch the window surface. If contamination occurs, clean the window thoroughly before operating the laser.

5. Use the correct mounting torque.
   Because the overall length of the laser housing is relatively long, when fastening the laser via the mounting lugs on both sides, use a torque screwdriver set to 0.2 N·m. Excessive or insufficient torque may affect the mechanical stability and performance of the laser.

Product Description

ER900 1.54µm / 1535nm 900µJ Eye-Safe Microchip DPSS Laser

The ER900 is a 1535nm eye-safe microchip DPSS laser designed as a compact, high-pulse-energy transmitter for ultra-long-range LiDAR and laser rangefinder systems. It targets OEM designers who need more than 800µJ single-pulse energy in a board-level package for multi-kilometer outdoor ranging and targeting tasks.

At the heart of the ER900 is a 1.54µm eye-safe DPSS cavity that delivers 900µJ pulse energy (typical) with a full-width-at-half-maximum (FWHM) pulse width of about 7ns at 5Hz repetition rate. The raw beam diameter is approximately 0.3mm, the beam divergence is ≤7mrad and the mode is TEM₀₀, giving a tight, near-Gaussian beam that is easy to collimate or feed into compact transmit optics for long-distance propagation.

The mechanical form factor is 40×8×7.5mm³ with a typical mass of 18g, providing high pulse energy without consuming much space or weight in a LiDAR or rangefinder engine. The mechanical drawing on page 2 shows a slim rectangular body with two side mounting lugs, allowing secure attachment to a baseplate or optical bench while keeping the optical axis low to the board.

Electrically, the ER900 is driven from a low-voltage, high-current pulse: the typical load voltage is around 2V, the operating current is 30A and the driver pulse width is specified as <3ms. The driver must be a constant-current source matched to these parameters and kept within the vendor’s recommended window; otherwise the laser may fail to start properly or could be overloaded and damaged.

The device is designed for harsh outdoor environments. The operating temperature range is −40°C to +65°C, and the storage temperature range is −55°C to +85°C. It withstands 1500G shock with 0.5ms pulse duration and vibration from 20–2000Hz at 20G, and the specified lifetime is greater than 1 million shots, which aligns with long-life airborne, vehicle and fixed-site LiDAR and LRF platforms.

In typical system architectures, the ER900 serves as the transmitter core for ultra-long-range 1535nm rangefinders, high-energy LiDAR channels and eye-safe target designation beams. The 1.5µm wavelength operates in an eye-safer regime and benefits from relatively low atmospheric attenuation and good penetration through haze, light rain and aerosols, making the ER900 especially suitable for UAV LiDAR payloads, shipborne and vehicle EO/IR heads, coastal and border surveillance, industrial mapping and structural monitoring where multi-kilometer performance is required but eye-safety must be respected.