Detailed ER300 Specifications
The technical material below is retained for this model only. Do not transfer a range, pulse, interface, mechanical or safety value from another 1535 nm product.
TECHNICAL SPECIFICATIONS
|
Model |
ER300 |
|
Laser Wavelength |
1535nm |
|
Eye safe |
Class 1 |
|
Pulse energy |
≥300 μJ |
|
Laser Pulse width |
5 ns |
|
Drive pulse width |
≤2.4 ms |
|
Pulse repetition rate |
1~10Hz |
|
Pulse stability |
10% |
|
Raw Beam Diameter |
0 .3 mm |
|
Beam divergence angle |
≤ 7 mrad |
|
Beam Mode |
TEM00 |
|
Operating temperature |
-40 ℃ ~ +65 ℃ |
|
Storage temperature |
-55 ℃ ~+ 75℃ |
|
Dimension (mm) |
25×8×6.8 mm3 |
|
Weight |
8.5 g |
|
Voltage |
2 V |
|
Electric current |
12 A |
|
Shock |
1500 G, 0.5 ms |
|
Vibration |
20~2000 Hz/20 G |
|
Lifetime |
＞1million shots |
OUTLINE DIMENSION
Figure 1 Outline Dimensions (mm)
Model-specific conditions and limits
Conditions are retained only when the source states them. They are not reconstructed from a nominal range or wavelength.
Operating Instructions
-
Match the laser driver to the ER200 laser.
The laser driver power supply must be properly matched to the laser.
The typical load voltage of the ER200 is < 2 V, with an operating current of 10 A, pulse width < 2 ms, and a repetition rate of 10 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. -
Always disconnect power before wiring.
Before making any connections, make sure the power is switched off and completely isolated.
When 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. -
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. -
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.
1535 nm Pulsed-Source Integration Context
Pulse energy, pulse width, repetition rate, beam divergence, drive waveform, thermal path and the receiving architecture must be assessed together in the finished instrument. The model PDF controls its source values; system range is not inferred from a pulse-energy value, a neighbouring model, or wavelength alone.
Pulse energy describes emitted energy per pulse; its effect cannot be separated from pulse width, divergence, optical losses, receiver threshold and the stated target/atmosphere conditions. It is not a substitute for a model-specific near- or long-range acceptance test.
Source-stated application context
Application labels indicate evaluation context, not automatic fitness for a finished system.
Product Description
ER300 1535nm 300µJ Eye-Safe Erbium Glass Microchip DPSS Laser
The ER300 is a 1.54µm, 1535nm eye-safe erbium glass microchip DPSS laser developed as a compact pulse source for long-range LiDAR, laser rangefinding and target designation tasks. It combines a diode-pumped Er³⁺:glass gain medium with a microchip resonator to deliver nanosecond pulses in a very small, board-level package that can be embedded in OEM systems where space and weight are tightly constrained.
The ER300 provides ≥300µJ single-pulse energy with a typical pulse width of 5ns and a repetition rate adjustable from 1 to 10Hz. Raw beam diameter is about 0.3mm and the divergence is ≤7mrad in a TEM₀₀ mode, which makes it straightforward to collimate or feed into a small-aperture transmit optic while maintaining good beam quality. Pulse stability is specified at 10%, supporting consistent performance for time-of-flight ranging and LiDAR point-cloud generation.
Designed for demanding outdoor environments, the laser operates from −40°C to +65°C and can be stored from −55°C to +75°C. It passes shock testing at 1500G / 0.5ms and vibration testing from 20–2000Hz at 20G, and the specified lifetime exceeds 1 million shots, giving system designers confidence in long-term field deployment. The module measures only 25×8×6.8mm³ and weighs about 8.5g, so it can be mounted directly on driver boards inside compact rangefinder or LiDAR modules.
Electrically, the ER300 is driven from a low-voltage, high-current pulse: typical load voltage is <2V, operating current is 12A, drive pulse width ≤2.4ms and repetition rate up to 10Hz. To protect the device, the driver must be correctly matched to these parameters; the specification sheet and factory test report are used as the reference for setting voltage, current, pulse width and PRF before enabling emission. Proper wiring practice is emphasized: power must be disconnected before connection, polarity must be carefully checked and all contacts should be secure to avoid short circuits, reverse polarity and intermittent connections.
Operating instructions also highlight the need to keep the laser output window clean. The window surface should not be touched; if contamination appears, it should be cleaned before use to prevent energy loss and potential damage. When integrated into a complete laser-ranging or LiDAR system, the ER300 acts as the transmitter core: its nanosecond pulse is expanded and collimated by the transmit optics, reflected from the target and detected at the receiver by an InGaAs APD matched to 1.5µm, with a TDC providing precise time-of-flight measurement.
Thanks to the 1.5µm wavelength, the ER300 works in an eye-safer regime and benefits from low atmospheric attenuation and strong penetration in haze, rain and aerosol conditions. Typical application scenarios include handheld and weapon-mounted laser rangefinders, micro and small UAV LiDAR payloads, EO/IR pods requiring an embedded 1535nm source, topographic mapping systems, industrial structural monitoring and robot navigation, as well as microjoule-to-millijoule-level hybrid architectures where ERDI’s erbium glass lasers are the core pulse engine.
Confirm short- and long-distance acceptance conditions
- Define minimum distance, target material, reflectance, size and incidence angle.
- Check receiver recovery, optical-axis overlap and strong-return handling at the intended near limit.
- Verify supply tolerance, peak current, grounding, interface levels, connector and timing with the ordered revision.
- For long-distance acceptance, state target geometry, visibility, weather, background and required detection probability.
- Test with the installed window, boresight, field of view, enclosure and thermal path rather than a bare module alone.
- Evaluate accessible emission, labels and failure conditions again for the finished laser product under IEC 60825-1.
Questions to resolve before design release
Does a stated maximum range apply to every target?
No. A stated range must be read with its target and environmental conditions. Dark, small, oblique, wet or partially obscured targets and degraded visibility can reduce received signal.
Does 1535 nm itself establish the laser classification?
No. Classification concerns accessible emission from the finished laser product. The module statement and final instrument assessment are distinct.
Can a long-range claim be used as the minimum range?
No. Minimum-distance behaviour depends on the particular transmit/receive geometry, receiver timing and strong-return management documented for the model and host system.
Product evidence and general technical context
The model PDF controls model claims. Public references below explain general engineering principles only.
- ERDI ER300 model PDFModel-specific technical evidence.
- System Design of a Pulsed Laser RangefinderOptical Engineering 30(3), 1991 - link budget, background, noise, detection and range error.
- The Short-Range, High-Accuracy Compact Pulsed Laser Ranging SystemSensors 22(6), 2146, 2022 - pulsed-ToF equation, timing error, reflectivity and temperature effects.
- Laser system range calculations and the Lambert W functionApplied Optics 48(4), B1-B7, 2009 - range performance versus atmospheric transmission, target and system parameters, and threshold SNR; its 1.06 µm example is general context, not ERDI model data.
- Monostatic all-fiber rangefinder systemApplied Optics 54(25), 7687-7694, 2015 - a measured case study of shared-aperture geometry and receiver-recovery loss; it does not establish an ERDI model limit.
- Light Transmission in Fog: The Influence of Wavelength on the Extinction CoefficientApplied Sciences 9(14), 2843, 2019 - measured and modeled wavelength-dependent fog attenuation.
- IEC 60825-1:2014Laser-product classification and accessible-emission requirements; final equipment requires system-level assessment.
- Practical application of pulsed “eye-safe” microchip laser to laser rangefindersOpto-Electronics Review 21(3), 2013 - a peer-reviewed 1535 nm rangefinder implementation; use for general transmitter/receiver and atmospheric-design context, not model specifications.