Detailed ER8000 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.
Specifications
ER8000 is part of the 1535 nm erbium-glass pulsed laser family. Its current PDF lists pulse energy ≥8 mJ and optical pulse width 13 ns. Repetition-rate status is shown separately in the table. These are the source's distinct specifications; none establishes the distance or accuracy of a finished instrument.
| Parameter | Current PDF value |
|---|---|
| Model | ER8000 |
| Laser Wavelength | 1535nm |
| Laser classification — source entry | Class 1 (classification report and evaluated configuration require confirmation) |
| Pulse energy | ≥8 mJ |
| Laser Pulse width | 13 ns |
| Drive pulse width | ≤ 4 ms |
| Pulse repetition rate | 1~5 Hz |
| Pulse stability | 5 % |
| Raw Beam Diameter | 0.8 mm |
| Beam divergence angle | ≤ 4mrad |
| Beam Mode | TEM00 |
| Operating temperature | -40 ℃ ~ +65 ℃ |
| Storage temperature | -55 ℃ ~+ 75℃ |
| Dimension (mm) | 110×40×24.5mm³ (Three linear dimensions in mm are listed; the source’s mm³ typography is not a calculated volume.) |
| Weight | 220 g |
| Voltage | ≤ 14 V |
| Electric current | 100 A |
| Shock | 1500 G, 0.5 ms |
| Vibration | 20~2000 Hz/20 G |
| Lifetime | ＞1million shots |
Reading this model's optical specifications
The recorded raw beam diameter is 0.8 mm and divergence is ≤ 4mrad. The current specification table does not state the divergence's full-angle/half-angle convention or the beam-width measurement method. Those definitions remain unspecified until a beam report confirms them. The beam-mode entry does not, by itself, supply a measured M² value.
Values above were checked against the current model PDF, including its inequality signs and stated measurement qualifiers. Source entries of “Class 1” require the corresponding classification report; shock, vibration and lifetime entries likewise need their stated test conditions. Missing tolerances and statistics are not reconstructed from another model or a paper.
Outline dimensions
Open the ER8000 mechanical drawing in its current PDF (page 2)
The PDF identifies this model's 110 mm enclosure. Use its dimensioned mechanical drawing for the correct mounting geometry.
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 conditions
Optical pulse and excitation pulse
ER8000's table gives an optical pulse width of 13 ns and a drive pulse-width entry of ≤ 4 ms. They describe different events: excitation loads energy into the gain assembly, whereas the emitted optical pulse is the short output event. They should not be interchanged when interpreting a trace or specification. This page provides no replacement driver settings; electrical connection and operating procedures belong to the supplied model manual.
Repetition rate, stability and temperature
Repetition-rate table entry: 1~5 Hz. Where a source-version clarification appears above, confirm that individual rating before specifying the ordered configuration. The entry is not a specification for arbitrary bursts or continuous-wave operation. Pulse stability is recorded as 5 %; the current table does not define whether this means RMS variation, peak-to-peak variation or another statistic. A meaningful comparison requires the same pulse count, repetition regime, warm-up state and measurement method.
The recorded operating range is -40 ℃ ~ +65 ℃; storage is -55 ℃ ~+ 75℃. Storage survival and emission performance are separate conditions. Temperature-dependent results should identify where temperature was measured, how the source was mounted and whether it had reached a stable thermal state.
What a useful optical test record contains
Record the model and serial number, output reference plane, wavelength, pulse-energy detector, temporal instrument response, measurement uncertainty and test temperature. Beam testing additionally needs x/y profiles, width definitions and the optical configuration. These details make results comparable without filling absent product specifications with assumed values. ISO 11146-1:2021; ISO 11146-2:2021.
1535 nm Pulsed-Source Integration Context
Technical principle
940 nm pumping: excitation and emission
ERDI's family description identifies a 940 nm pump architecture. This is a family-level statement; the retained ER8000 table does not independently specify its pump diode or wavelength tolerance. Published bulk Er/Yb-glass experiments demonstrate 940 nm pumping with passive Q-switching, establishing a relevant physical example. Their pump powers and measured outputs are not ER8000 specifications. Zou et al., 2017.
The pump supplies excitation to the sensitizer/gain system, while the useful laser emission occurs near 1.5 µm. In an Er/Yb architecture, ytterbium sensitization transfers excitation to erbium. The erbium laser transition supplies the output. Absorbed optical excitation, emitted pulse energy and electrical input are different quantities; their relationship depends on material properties and losses, not on the wavelength names alone. Liu et al., 2003.
Erbium glass: energy storage and optical gain
Erbium-doped glass is the active medium. Co-dopants and host composition influence absorption, transfer processes and available gain. The resonator feeds light through the excited material so that stimulated emission can amplify it. “Erbium glass” is a material class, not a universal composition: a product's glass grade, dopant concentrations and dimensions require its own specification. A paper's material recipe must not be assigned to this model. Liu et al., 2003.
Spinel: the passive Q-switch mechanism
For a configuration using cobalt-doped magnesium aluminate spinel, Co²⁺:MgAl₂O₄ acts as a saturable absorber inside the resonator. Initially it contributes optical loss while excitation accumulates. As intracavity intensity rises, its absorption decreases, enabling a short pulse to develop; the gain then depletes and the absorber recovers. This is passive Q-switching. Undoped transparent spinel and cobalt-doped saturable-absorber spinel are different descriptions. The latter function is well established in Er/Yb-glass literature, but the exact absorber in ER8000 requires confirmation from its own material record. Karlsson et al., 2000.
Output coupler: feedback and extraction
A laser resonator retains part of its circulating light as feedback. The output coupler transmits a fraction as useful emission while reflecting a fraction back into the cavity. Its role differs from a collimating lens or an external protective window. Coupling, gain and internal losses act together; increasing transmission does not universally increase output. Coating values, substrate and cavity geometry belong to the individual design, and are not specified here by analogy with another laser. Karlsson et al., 2000.
Square spots: identify the wavelength and plane
A square profile can refer to pump illumination, an output near-field image or a far-field distribution. These are different observations. A square glass element also does not prove a square intensity pattern. The available model table does not identify a square profile or its plane. Any future product-specific claim should therefore accompany a measured profile, wavelength, distance and x/y dimensions. A general discussion of pump shaping cannot establish the output shape.
Initial divergence and collimation
“Initial divergence” needs a defined position relative to external beam-conditioning optics. Full-angle and half-angle descriptions differ by a factor of two; asymmetric beams also need both transverse directions. Beam-width definitions must accompany the measurement. ISO 11146 supplies methods for widths, divergence and propagation ratios; it does not supply a value for this product. ISO 11146-1:2021; ISO 11146-2:2021.
Collimation changes the wavefront and effective waist. A finite beam still diffracts: in the ideal Gaussian description, a larger waist corresponds to smaller far-field divergence at a fixed wavelength. Real-beam quality and optical aberrations affect the result. This explains why a bare source and an assembled, beam-conditioned optical instrument may have different diameter and divergence entries. Neither “collimated” nor a single spot photograph proves zero divergence. MKS/Newport: Gaussian Beam Optics; MKS/Newport: Focusing and Collimating.
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.
The current model record pairs the 8 mJ threshold with a 110 × 40 × 24.5 mm enclosure. A 0.8 mm raw beam diameter and divergence ≤4 mrad distinguish this package from the smaller 2 mJ and 4 mJ sources. The beam definitions still need to match the method used in a comparison.
ER8000 and ER10000 share the listed enclosure dimensions and mass but differ in pulse energy and optical duration. ER8000’s 5% stability entry also lacks a defined statistic, so the page does not convert it into an RMS guarantee. Product-specific evidence remains separate from general discussions of erbium-glass laser operation.
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
What distinguishes ER8000 from ER10000?
The two model tables share a 220 g, 110 × 40 × 24.5 mm package, but ER8000 lists ≥8 mJ and 13 ns optical pulses. ER10000 has different energy and optical-duration entries. Use both distinctions rather than treating enclosure similarity as equivalent optical performance.
What is the size of the ER8000 source?
Its recorded external dimensions are 110 × 40 × 24.5 mm with a mass of 220 g. The three dimensions identify a mechanical envelope, not a measured volume. Use the current model drawing for the supplied configuration and its dimensional tolerances.
What does ER8000’s 5% stability entry establish?
The table records 5% without a stated statistical method. This is not enough to claim a 5% RMS or peak-to-peak limit. The model’s own acceptance record should define the sample, operating condition and calculation used for any formal stability comparison.
How is the 13 ns pulse entry used in comparison?
It identifies ER8000’s documented optical pulse duration. The table does not explicitly state FWHM for this entry, so a comparison should not silently assume it. The longer excitation duration is a separate quantity and is not a substitute for the emitted-pulse width.
Does the 8 mJ entry specify a completed laser rangefinder?
No. ER8000 is the optical source represented by its controlled table. A receiver, complete optical path, target conditions and atmospheric state affect finished-instrument performance. No particular measurement distance or target-detection claim follows solely from the source’s 8 mJ minimum energy.
Product evidence and general technical context
The model PDF controls model claims. Public references below explain general engineering principles only.
- ER8000 controlled model datasheetModel identity and the product-specific values and qualifications discussed on this page.
- ISO 11146-1:2021 — laser beam measurementDefinitions and measurement methods for beam width, divergence and propagation ratio; not an ERDI model test report.