ER4000 4mJ 1535nm Eye-Safe Erbium Glass Laser for LiDAR, Sensing and Medical Systems

TECHNICAL SPECIFICATIONS

OUTLINE DIMENSION

Figure 1 Outline Dimensions (mm)

Operating Instructions

1. Match the laser driver to the ER4000 laser.
   The laser driver power supply must be properly matched to the laser.
   The typical load voltage of the ER4000 is < 5 V, with an operating current of 100 A, pulse width < 4 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.

Product Description

ER4000 1.54µm / 1535nm 4mJ Eye-Safe Erbium Glass Microchip DPSS Laser

The ER4000 is a 4mJ 1535nm eye-safe erbium glass microchip DPSS laser developed as a high-energy core for long-range LiDAR, precision laser rangefinders, infrared sensing and selected medical and communication systems. It uses an LD-pumped Er:glass gain medium in a compact resonator to generate nanosecond pulses at a Class 1 eye-safe wavelength, combining millijoule-level energy with a small, integration-friendly package.

The laser delivers ≥4mJ pulse energy with a typical pulse width of 12ns and a repetition rate adjustable from 1 to 10Hz. Pulse stability is about 10%. The raw beam diameter is ~0.5mm, the full-angle divergence is ≤4mrad and the mode is TEM₀₀, so users get a clean, well-collimated beam that is easy to expand for long-range LiDAR or to couple into compact transmit optics, scanners or fiber couplers.

Mechanically, the ER4000 fits into a 60×25×13.5mm³ housing and weighs about 105g, giving designers a 4mJ, 1535nm source that still fits inside pods, turrets and instrument bays where space is at a premium. Electrically, the typical load voltage is <5V with a high drive current of roughly 100A, drive pulse width ≤4ms and nominal repetition rate around 5Hz, adjustable in the 1–10Hz range. The driver must be properly matched to these parameters; otherwise the laser may fail to start correctly or may be overloaded and permanently damaged.

The ER4000 is built for harsh outdoor environments. It operates from −40°C to +65°C and can be stored between −55°C and +75°C. It withstands 1500G shock with 0.5ms duration and 20–2000Hz vibration at 20G, and the specified lifetime exceeds 1 million shots, which aligns with long-life LiDAR, rangefinding and sensor payload requirements.

Beyond classic laser rangefinders and LiDAR, 1535nm Er:glass sources are widely used in target recognition, laser radar, laser medical treatment and optical-fiber communication links, thanks to eye-safety and compatibility with telecom-grade components. The strong water absorption near 1.5µm also allows controlled energy deposition in water-rich tissues, enabling non-ablative skin treatments and other medical procedures, while the low atmospheric attenuation and good penetration in fog, rain and aerosol make the ER4000 suitable for meteorological LiDAR, obstacle-avoidance radar and environmental sensing. 

Operation instructions focus on driver matching and safe wiring. Before any connection, the power supply must be completely switched off and isolated. During wiring, the positive and negative terminals must be checked carefully and all contacts must be firmly secured to avoid short circuits, reverse polarity or intermittent connections. After wiring, the driver parameters—voltage, current, pulse width and repetition rate—should be set according to the attached factory test report; once these are confirmed, the driver can be enabled and the ER4000 should operate normally.

Taken together, the 4mJ pulse energy, eye-safe wavelength, TEM₀₀ beam quality, compact size and MIL-grade environmental performance make the ER4000 a versatile 1535nm platform laser for long-range LiDAR channels, high-end rangefinders, advanced sensing nodes, medical devices and fiber or free-space optical links where both safety and performance matter.