400uJ 10Hz Erbium Doped Glass Laser - 1535nm Infrared Laser For Precision Applications

The 400μJ 1535nm Erbium Glass Laser is a compact, eye-safer pulsed laser source designed for laser rangefinders, LiDAR systems, and electro-optical ranging equipment. It delivers 400μJ pulse energy at 1–10Hz with a 4–5ns pulse width, providing a practical balance between ranging energy and system SWaP requirements. Compared with lower-energy 1535nm sources, the 400μJ output provides additional energy margin for demanding ranging applications without moving to a significantly higher-energy laser architecture. With a compact 32 × 12 × 8mm package (without connector) and ≤10g weight, it is particularly suitable for OEM integration into portable, UAV-borne, and space-constrained ranging systems.

For a 1535nm laser rangefinder or LiDAR transmitter, pulse energy is not simply a "higher is better" parameter. The right energy level must be balanced against ranging margin, module size, weight, drive requirements, thermal load, and system integration constraints. A 400μJ 1535nm Erbium Glass Laser is positioned as a practical middle-energy solution for systems that need more transmitted pulse energy than compact 200–300μJ sources, while avoiding the higher SWaP and electrical demands typically associated with higher-energy laser architectures.

At 400μJ pulse energy with a 4–5ns pulse width, this laser provides approximately 80–100kW of calculated peak optical power, giving system designers a stronger transmit pulse for laser ranging and LiDAR applications where target reflectivity, atmospheric loss, receiver sensitivity, or required ranging distance can reduce link margin. The 1–10Hz repetition rate also makes it suitable for rangefinder architectures that prioritize reliable single-pulse detection and controlled pulse timing rather than high-frequency scanning.

The 400μJ configuration is especially useful when a lower-energy laser may leave limited system margin, but moving directly to a 500μJ or higher-energy source would add unnecessary size, weight, drive current, or thermal complexity. With a compact 32 × 12 × 8mm package (without connector) and a weight of ≤10g, this model is well suited to compact laser rangefinders, UAV-borne electro-optical payloads, portable ranging devices, and space-constrained LiDAR transmitter modules.

For OEM system designers, the key advantage of the 400μJ level is therefore not pulse energy alone, but its balance between usable ranging energy and compact integration. It provides a differentiated option within the 1535nm Er laser family for applications that require more link-budget headroom than lower-energy modules without moving to a substantially larger high-energy transmitter platform.

80–100kW Nanosecond Peak Power for High-Precision Laser Ranging

Featuring 400μJ single pulse energy and 4–5ns narrow pulse width, the 1535nm erbium glass laser achieves a calculated peak optical power of 80–100kW. The combination of ultra-short pulse duration and high peak power brings prominent performance gains to laser rangefinder and LiDAR transmitter systems. It effectively boosts instantaneous optical output power, greatly enhancing the transmitting-end energy margin. This capability enables reliable detection oflow-reflectivity targets and fully offsets signal attenuation caused by atmospheric interference and optical path losses in actual field scenarios.

For OEM customized ranging systems, this pulse design delivers unique engineering benefits. Instead of raising average optical power which brings extra power consumption and heat generation, the module concentrates fixed 400μJ pulse energy into nanosecond-level narrow pulses. This design perfectly matches pulsed time-of-flight (ToF) ranging architectures, ensuring ultra-clear echo return signals and high-stability, high-precision ranging trigger events for long-term system operation.

Note: The peak power calculation adopts nominal pulse energy divided by standard pulse width. The actual output peak power is subject to real-tested temporal pulse profiles.

≤10g Ultra-Light SWaP-Optimized Structure for Embedded Integration

With a compact outline dimension of 32 × 12 × 8mm (connector excluded) and ultra-light weight of ≤10g, this laser module is fully optimized for strict size, weight and power (SWaP) constraints, adapting to diverse highly integrated embedded ranging platforms.

The lightweight and miniaturized package is highly applicable to UAV laser rangefinders, portable electro-optical systems, compact LiDAR units and handheld ranging devices, which have extremely strict limitations on transmitter size and payload weight. Different from conventional miniature laser products with single-dimensional size reduction, this SWaP-optimized structure reserves sufficient design margin for system integrators. It facilitates the reasonable layout and matching of peripheral components including laser drivers, collimation optics, signal receivers, mechanical fixing structures and thermal management modules, greatly improving the overall integration flexibility of the end system.

1–10Hz Adjustable PRF for Diversified Ranging System Deployment

Equipped with 1–10Hz wide-range adjustable pulse repetition frequency (PRF), the 1535nm 400μJ laser module supports flexible matching with various ranging cycle logics and system control schemes, meeting differentiated application demands.

In practical laser ranging scenarios, users can configure low PRF parameters for scenarios requiring long-distance single-point measurement, low-power energy management, and synchronous linkage with other electro-optical devices. Meanwhile, the maximum 10Hz operating frequency realizes high-frequency repeated ranging measurement while maintaining the standard 400μJ pulse energy grade, balancing ranging efficiency and detection stability.

The adjustable PRF feature provides great design flexibility for OEM developers. It enables seamless coordination with supporting systems such as laser drive circuits, detector timing modules, signal processing circuits and range gating logic. The module is no longer limited to fixed-frequency ranging equipment, and can be widely secondary-developed for customized 1535nm laser ranging transmitters.

-40°C～+65°C Wide Temperature Operation for Outdoor Mobile Platforms

The module supports stable operation within a -40°C to +65°C full temperature range, breaking the limitation of laboratory constant-temperature environments and adapting to complex and variable outdoor field working conditions.

This wide-temperature reliability is core for UAV-mounted LiDAR systems, vehicle-borne electro-optical equipment, field portable rangefinders and outdoor sensing platforms. It effectively copes with drastic ambient temperature changes during equipment storage, cold start and long-duration field operation, ensuring continuous and stable laser output performance.

For system integrators, the excellent wide-temperature adaptability simplifies the selection and design of outdoor laser transmitters. To achieve optimal overall system performance, it is necessary to comprehensively calibrate and verify the matching laser driver parameters, mechanical installation and fixation, optical path alignment accuracy and overall thermal design, especially when the equipment operates near the extreme temperature thresholds.

Choosing between a 300μJ, 400μJ and 500μJ 1535nm Erbium Glass Laser should be based on the ranging system's required energy margin, SWaP budget, receiver sensitivity, target characteristics and integration constraints-not pulse energy alone. Within this product family, the 400μJ 1535nm laser is positioned between lower-energy transmitters optimized primarily for compact integration and higher-energy sources intended for applications where additional transmitted energy is the overriding design requirement.

Where the 400μJ Model Fits

The 400μJ 1535nm Er laser is intended for laser ranging systems that require additional pulse-energy margin beyond a 300μJ-class source while still placing strong constraints on transmitter size and weight.

With 400μJ pulse energy, 4–5ns pulse width and approximately 80–100kW calculated peak optical power, it provides a balanced transmitter option for laser rangefinders, compact LiDAR systems, UAV-borne electro-optical payloads and portable ranging equipment.

Its 32 × 12 × 8mm dimensions (without connector) and ≤10g weight are particularly relevant where the laser source must share limited system space with the driver, collimation optics, receiving optics, detector and signal-processing electronics.

When to Consider a 300μJ 1535nm Laser

A 300μJ 1535nm Erbium Glass Laser can be the more appropriate choice when minimizing transmitter SWaP or electrical demand has higher priority and the optical link budget does not require the additional pulse energy available from the 400μJ model.

Typical design priorities may include:

short- to medium-range laser ranging architectures;

highly space- or weight-constrained optical payloads;

systems with favorable target reflectivity or receiver sensitivity;

applications where lower transmitter energy is sufficient to maintain the required detection margin.

In these systems, increasing pulse energy may provide limited practical benefit if the required ranging performance is already achieved with the lower-energy source.

Why Step Up to 400μJ?

Moving from 300μJ to 400μJ pulse energy represents approximately a 33% increase in nominal transmitted pulse energy.

For a laser rangefinder designer, this additional energy can provide useful link-budget headroom when system losses increase because of target reflectivity, atmospheric transmission, optical efficiency, beam divergence or receiver limitations.

The 400μJ model is therefore particularly relevant when a 300μJ source is close to the system's required performance margin, but the design team does not want to move directly to a higher-energy transmitter architecture.

This is the key positioning of the 400μJ 1535nm laser for ranging: it is not simply a higher-output version of the 300μJ model, but an intermediate energy option for systems balancing ranging margin against SWaP and integration complexity.

When to Consider a 500μJ 1535nm Laser

A 500μJ 1535nm Er laser becomes more relevant when maximizing transmitted pulse energy is more important than maintaining the energy/SWaP balance offered by the 400μJ configuration.

Higher pulse energy may be considered for systems facing more demanding link-budget conditions, such as lower-reflectivity targets, greater propagation losses or applications requiring additional transmitter-side energy margin.

However, selecting a higher pulse-energy source should always be evaluated at system level. The additional energy must be considered together with the required laser driver, peak current, thermal design, mechanical envelope, optical configuration and overall power budget.

For this reason, a 500μJ source is not automatically the better choice simply because its pulse energy is higher.

300μJ vs 400μJ vs 500μJ: Selection Logic

How to Select the Right 1535nm Laser for Your Rangefinder

Pulse energy should be selected as part of the complete 1535nm laser rangefinder link budget rather than as an isolated laser specification. Before choosing between a 300μJ, 400μJ or 500μJ laser source, system designers should consider:

Target reflectivity and required ranging distance.
Low-reflectivity targets or more demanding propagation conditions may require greater transmitted energy to maintain sufficient return-signal margin.

Transmitter optical efficiency.
Losses introduced by collimation optics, windows, coatings and other optical components reduce the energy ultimately transmitted toward the target.

Beam divergence.
The transmitted energy must be evaluated together with beam divergence because both parameters determine how optical energy is distributed at the target distance.

Receiver sensitivity and aperture.
Detector type, receiving aperture, optical transmission and signal-processing capability influence how much transmitted pulse energy the complete rangefinder actually requires.

System SWaP constraints.
For UAV, handheld and compact EO systems, the laser cannot be selected independently of the available volume, weight, electrical power and thermal budget.

For systems where these factors indicate that a 300μJ transmitter provides insufficient design margin while a higher-energy architecture is unnecessary, the 400μJ 1535nm Erbium Glass Laser provides a practical middle-energy solution for laser rangefinder and LiDAR integration.

Selection note: Actual ranging performance cannot be determined from pulse energy alone. Maximum detection distance depends on the complete transmitter and receiver design, target reflectivity, atmospheric conditions, beam divergence, optical efficiency and signal-processing architecture. Our engineering team can support OEM customers in selecting the appropriate 1535nm pulse-energy level according to their system requirements.

The 400μJ 1535nm erbium glass laser is purpose-built for pulsed ranging systems that demand balanced performance in high transmit energy, compact integration and low SWaP characteristics. Boasting core specifications including 400μJ pulse energy, 4–5ns narrow pulse width, 1–10Hz adjustable PRF, ultra-compact 32 × 12 × 8mm footprint and lightweight ≤10g body weight, this laser module delivers excellent adaptability for OEM integration across various laser ranging and electro-optical (EO) platform systems.

Laser Rangefinder Integration

This 1535nm 400μJ laser serves as an ideal transmitter core for compact long-range laser rangefinders based on the time-of-flight (ToF) working principle. Compared with conventional low-energy Er:Glass laser sources, its 400μJ pulse energy significantly improves system link budget and transmit-side power margin, effectively resolving insufficient detection capability for long-distance and low-reflectivity targets, while maintaining a miniature form factor for embedded system integration.

The ultra-narrow 4–5ns nanosecond pulse width guarantees precise pulse triggering and high-resolution echo signal discrimination, laying a solid foundation for high-accuracy ranging results. Meanwhile, the flexible 1–10Hz adjustable pulse repetition frequency allows system developers to achieve precise synchronization with laser drivers, photodetectors, timing circuits and ranging algorithms, adapting to diverse ranging working modes.

It is widely applicable to multiple mainstream rangefinder scenarios:

• Handheld and portable laser rangefinder devices
• Electro-optical observation and target positioning systems
• Vehicle-mounted ranging and sensing equipment
• Miniature customized OEM rangefinder modules

In actual product development, 300μJ-class lasers often suffer from insufficient power margin for complex environmental ranging, while ultra-high-energy laser devices will bring excessive weight, power consumption and structural burden. The 400μJ laser module just fills this market gap, achieving a perfect balance between ranging performance and system adaptability.

LiDAR and UAV Electro-Optical Payloads

Benefiting from its ≤10g ultra-light weight and 32 × 12 × 8mm miniaturized size (connector excluded), this 1535nm erbium glass laser is highly suitable for lightweight LiDAR transmitters and UAV EO payloads with stringent SWaP constraints. As a mainstream eye-safe laser wavelength, 1535nm ensures safe outdoor operation, and the 400μJ high pulse energy provides stronger transmit signal strength without upgrading to bulkier high-energy laser products.

For UAV airborne EO systems, the lightweight laser transmitter greatly reduces overall payload load, reserving sufficient installation space and load margin for other core components:

• Receiving optical systems and collimation beam expansion components
• High-sensitivity InGaAs photodetectors
• Inertial measurement units and sensing sensors
• Gimbal stabilization structures and motion assemblies
• High-speed signal processing and control circuits

Matched with the 1–10Hz adjustable PRF, the module features stable and controllable pulse output timing. It is more oriented to high-reliability distance measurement scenarios, fully meeting the operational requirements of ranging-type LiDAR and UAV EO payloads, which prioritize measurement accuracy and stability over ultra-high point cloud density.

Compact Electro-Optical Ranging Systems

This 400μJ 1535nm pulsed laser module can be used as a high-performance laser transmitter for highly integrated compact electro-optical ranging systems. It perfectly adapts to integrated optoelectronic systems that integrate laser emission, optical reception, photoelectric detection and signal processing within limited structural space.

Its outstanding low-weight and miniaturized advantages save valuable structural space and thermal design budget for the whole machine, allowing developers to optimize the configuration of core subsystems while retaining high-level 400μJ pulse energy to ensure excellent ranging detection capability.

The typical integrated system workflow is formed by matching core optoelectronic components in sequence: laser driver → collimation optics → transmitting aperture → receiving optics → InGaAs detector → signal-processing electronics. This complete matching logic enables the module to be widely used in OEM customized equipment, including portable EO ranging devices, miniaturized reconnaissance sensing systems, UAV-borne ranging payloads and integrated optoelectronic detection modules.

Different from ordinary single laser components, this 400μJ laser module is designed for the overall optimization of 1535nm laser ranging architecture. It comprehensively balances core system indicators such as pulse energy, beam divergence angle, receiver detection sensitivity, optical transmission efficiency and SWaP performance, providing a mature and reliable laser transmitting solution for medium and long-distance precision ranging systems.

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Evaluating the 400μJ 1535nm Erbium Glass Laser for a laser rangefinder, LiDAR system or electro-optical ranging project? Contact our team for detailed technical information, sample evaluation and OEM integration support based on your system requirements.

Request Technical Datasheet

Get the detailed specifications of the 400μJ 1535nm laser module, including optical, electrical and mechanical parameters required for system evaluation.

For engineering assessment, you can request information such as:

pulse energy, wavelength and pulse width specifications;

repetition rate and operating conditions;

beam diameter and divergence;

module dimensions and weight;

electrical interface and drive requirements;

mechanical drawings and integration information.

CTA: Request Technical Datasheet

Discuss OEM Integration

If you are developing a 1535nm laser rangefinder, LiDAR transmitter or compact EO ranging system, our team can discuss how the laser source fits into your transmitter architecture.

Please share your key system requirements, such as target pulse energy, repetition rate, available installation space, beam characteristics, operating temperature and electrical interface. This allows us to evaluate the appropriate laser configuration and available customization options more efficiently.

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Request an Engineering Sample

Need to verify the laser in your own optical or ranging system before moving to production?

An engineering sample of the 400μJ 1535nm Er:Glass laser can be requested for prototype integration, driver matching, optical alignment and system-level performance evaluation.

When submitting a sample request, providing information about your intended application and test conditions will help us recommend the most suitable configuration.

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Get Volume Pricing for OEM Production

For prototype builds, pilot projects and recurring production requirements, contact us for an OEM quotation based on your expected purchasing volume and technical configuration.

To receive a more accurate quotation, please include:

required quantity or estimated annual volume;

application, such as laser rangefinder or LiDAR;

required pulse energy and repetition rate;

customization requirements, if any;

prototype or production schedule.

For volume projects, our team can also discuss laser configuration, engineering support and production supply requirements before quotation.

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Not Sure Which 1535nm Pulse Energy to Choose?

If your system is still being defined, send us your required ranging distance, target characteristics, receiver configuration, size and weight limits, and operating environment. Our engineering team can help evaluate whether a 300μJ, 400μJ or 500μJ 1535nm Erbium Glass Laser is the more appropriate starting point for your ranging architecture.

Send Your Ranging Requirements →

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