Product technical note
The complete product technical page, including the hero visual, core advantages, specification table, pulse calculator, applications, integration notes and FAQ.
LZ1535-1KHz-5ns-40μJ-25mm high repetition rate erbium glass laser, designed for compact rangefinding and LiDAR systems. It integrates ≥40 μJ single pulse energy, typical 5 ns pulse width, and 1 kHz repetition rate in a lightweight package, providing a key emission source for UAV payloads, long-distance rangefinding equipment, and specialized optoelectronic systems.
For long-range ranging systems, the laser source needs to balance energy, pulse timing, beam quality, and overall system size. This 1535 nm erbium-doped glass laser is designed around high repetition rate, short pulse width, and compact integration.
The laser can output 1,000 pulses per second, with a pulse interval of about 1 ms. High repetition frequency allows the system to acquire distance echoes more frequently, suitable for ranging links that require continuous sampling or rapid distance updates.
One pulse cycle every 1 ms1535 nm belongs to a wavelength band commonly used in eye-safe ranging designs. Compared to bands like 905 nm, this band has different absorption characteristics in ocular media, offering advantages for eye safety design in outdoor ranging systems.
Safety level still needs to be evaluated for the whole deviceConcentrating energy in nanosecond short pulses helps build ranging systems with stronger emitted-echo budgets. Based on nominal energy and typical pulse width, the average power within a pulse is about 8 kW, while the actual peak depends on the pulse waveform.
Estimated value of pulse energy ÷ pulse widthThe datasheet indicates that this series features tail-free pulses and stable pulse energy; this model specifies an energy stability RMS of 3%, which helps reduce the impact of transmitter fluctuations on system calibration and echo determination.
Energy stability RMS: 3%Using the TEM₀₀ beam mode, the datasheet specifies a full beam divergence angle ≤11 mrad. The final spot and divergence performance will also be affected by collimation/beam expansion optics, assembly, and system structure.
Full beam divergence angle ≤11 mradThe diode-pumped module and laser crystal adopt an integrated design, with small packaging and lightweight, convenient for embedding into handheld, vehicle-mounted, or airborne ranging devices with limited space.
Compact System Integration FriendlyTranslating the specification parameters into system engineering language allows determining whether the laser source is suitable for specific ranging equipment. The following values are basic conversions based on the datasheet nominal parameters and do not replace full system performance tests.
1 kHz is 1,000 Hz, and under ideal conditions, the time interval between adjacent pulses is 1 msThe system can emit pulses more frequently within the specified ranging process and acquire echo samples. The actual distance refresh rate still depends on reception processing, ranging algorithms, scanning method, and target scenario.
Microjoules describe the energy of a single pulse. For long-range links, emitted energy is an important budget item but not the sole criterion. How the optical system directs energy toward the target and how much scattered light the receiver can collect determine the final link margin.
Nanosecond-level pulses are advantageous for pulse time-of-flight (ToF) ranging architectures. Light travels about 1.5 m within 5 ns; ToF rangefinding usually converts based on round-trip time, ideally corresponding to a distance scale of about 0.75 m. The pulse width itself does not equal the final ranging accuracy; the system’s detection bandwidth, signal-to-noise ratio, timing circuitry, and algorithms are equally critical.
This model is intended for long-distance ranging applications and has undergone long-range test verification. When quoting specific test distances externally, it is recommended to also specify the test target, target reflectivity, meteorological visibility, transmitting/receiving optical aperture, and detector scheme, to avoid considering a single test result as a fixed metric for all systems.
Around UAV payloads and outdoor long-distance ranging requirements, it can coordinate with receiving detectors, transceiver optics, and ranging algorithms for link verification.
Lightweight packaging and a 1 kHz repetition rate provide a source option for ranging equipment that requires considerations for weight, volume, and distance information updates. The following are system matching directions and do not imply that the laser alone can realize full system functionality.
Can serve as a ranging emission source on a UAV platform, working with the receiver and optical system to collect target distance information. The 8 g lightweight module is advantageous for payload design constrained by weight and space.
UAV RANGEFINDING · PAYLOAD INTEGRATIONIntended for distance measurement subsystems in handheld, vehicle-mounted, airborne, or other special electro-optical equipment. Pulse stability, environmental adaptation temperature range, and compact packaging can be evaluation factors when selecting a solution.
DEFENSE & SPECIALTY OPTOELECTRONICSCan serve as a candidate emission source for distance sensing or target ranging subsystems, supporting the system in obtaining target distance information. Detection probability, recognition capability, and system response depend on the complete set of sensors and software links.
COUNTER-UAV SENSING SUBSYSTEMApplicable for evaluating light sources in LiDAR, weather radar, and other systems. High repetition frequency results in shorter emission intervals, and the compact module is convenient for integration into optical-mechanical structures with limited space.
LIDAR · METEOROLOGICAL REMOTE SENSINGEngineering note: The application directions listed in the datasheet include laser ranging, weather radar, UAV, and counter-UAV applications. Actual adaptability to military/special equipment, reliability, and environmental tolerance should be verified by the final system’s opto-mechanical-electrical design, environmental testing, and compliance processes; the current datasheet does not provide data on shock, vibration, lifetime, or whole-device protection ratings.
The input values can be modified for basic estimation. The default values correspond to the nominal parameters in this product specification; the results are for understanding the relationship between pulse energy and repetition rate only.
Pulse energy represents the energy of a single pulse; repetition frequency represents the number of emissions per second. Multiplying the two can estimate the average optical power. Dividing energy by pulse width can estimate the average power within the pulse, but it cannot be directly considered the measured peak power.
Default parameter conversion: 40 μJ × 1,000 Hz ≈ 40 mW average optical power; 40 μJ ÷ 5 ns ≈ 8 kW average power within a pulse. Pulse shape, actual energy, and driving conditions all affect measured results.
The following data come from the product datasheet. The datasheet specifies: the data in the table are typical test values at 25℃ room temperature; final data are subject to the final test report.
| Parameter Items | Specification |
|---|---|
| Optical Parameters | |
| Wavelength | 1535 nm |
| Pulse energy | ≥40 μJ |
| Repetition rate | 1 kHz |
| Pulse Width (Typical Value) | 5 ns |
| Energy Stability (RMS) | 3% |
| Full Beam Divergence Angle | ≤11 mrad |
| Beam Mode | TEM₀₀ |
| Electrical and Mechanical Parameters | |
| Operating Current | 12 A |
| Operating Voltage | 2 V |
| Dimensions (Length × Width × Height) | 25 × 8 × 7 mm |
| Weight | 8 g |
| Environmental Parameters | |
| Operating Temperature | −40 ～ +65 ℃ |
| Storage Temperature | −45 ～ +80 ℃ |
Note: The above parameters are based on the LZ1535-1KHz-5ns-40μJ-25mm specification. Typical pulse width, energy stability, and other parameters are related to test conditions; batch, driving scheme, and system integration conditions may affect the final performance. Please refer to the specification and test report confirmed at the time of supply.
The laser is one of the core components of the emission link, but ranging performance is determined by the entire electro-optical system. Clearly defining driving, optical, and safety boundaries during the design phase helps reduce repeated debugging.
The datasheet lists an operating voltage of 2 V and an operating current of 12 A. You need to confirm with the matching driver regarding current pulses, driving timing, power supply ripple, heat dissipation paths, and PCB/connector capabilities; do not infer the driving method based solely on DC voltage.
Choose collimation/beam expanding optics, receiving aperture, and detector according to the working distance and field of view. The specified full divergence angle ≤11 mrad does not equal the system's final divergence angle; the actual beam spot, receiving field of view, and echo budget need verification through optical design.
The 1535 nm wavelength advantage cannot replace the overall system laser safety assessment. Risk analysis should be conducted according to the final optical structure, pulse parameters, usage distance, and applicable standards; for airborne/vehicle-mounted or other complex environments, system-level vibration, shock, temperature cycling, and lifetime verification are also required.
In the stage of solution review and selection, the following boundary conditions are worth clarifying in advance.
No. 1535 nm belongs to a wavelength band commonly used for eye-safe rangefinder designs. Its eye absorption characteristics are advantageous, but this does not mean that any emission conditions are safe, nor can it directly determine that the entire device meets a specific laser safety class. Safety assessment should be completed based on the final product, optical system, emission parameters, and applicable regulations/standards. Avoid looking directly into the output aperture or using optical devices to observe the beam.
The current datasheet does not provide a maximum range applicable to all systems. The actual range depends on single pulse energy, divergence angle, emission and reception aperture, detector performance, target reflectivity, background light, atmospheric visibility, and signal processing method. When publishing range externally for a project, the specific system’s test records should be referenced and testing conditions explained.
Not necessarily. 1 kHz indicates that the laser emits pulses at a repetition rate of 1,000 pulses per second. Whether the system can output effective distance data at the same frequency also depends on echo reception, dead time, target distance, scanning strategy, signal processing, and algorithm design.
Normally requires integration with the driving circuit, transmitting optics, receiving detector, timing/processing circuit, mechanical mounting, and overall system safety design. The specification provides some electrical and optical parameters of the laser itself, but does not include the complete driving, receiver, or system interface specifications for a complete ranging terminal. Confirm with the supplier before integration.
Based on 1535 nm, 1 kHz, ≥40 μJ, and a typical 5 ns pulse width, further discuss driving schemes, optical configuration, sample testing, and project-level ranging verification. Technical selection should aim at the complete system performance, not just compare single laser parameters.
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