Structured Manufacturing Data (2026)

Laser Diode

Based on aggregated insights from structured factory profiles within the CNFX directory, the standard Laser Diode used in the Computer, Electronic and Optical Product Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Laser Diode is characterized by the integration of Semiconductor Chip and Heat Sink. In industrial production environments, manufacturers listed on CNFX commonly emphasize Gallium Arsenide (GaAs) construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A semiconductor device that emits coherent light through stimulated emission, used as the light source in particulate matter sensors.

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Product Specifications

Technical details and manufacturing context for Laser Diode

Definition
A laser diode is a key component in particulate matter sensors that generates a focused, coherent laser beam. Within the sensor system, it serves as the illumination source that interacts with airborne particles. When particles pass through the laser beam, they scatter light, which is then detected and analyzed to determine particle concentration, size distribution, and composition.
Working Principle
The laser diode operates on the principle of stimulated emission in a semiconductor p-n junction. When forward-biased with sufficient current, electrons and holes recombine in the active region, emitting photons. These photons are amplified through optical feedback within the resonant cavity, producing a coherent, monochromatic laser beam. In particulate matter sensors, this beam illuminates the sampling volume where particles scatter light according to Mie scattering theory.
Common Materials
Gallium Arsenide (GaAs), Indium Gallium Arsenide (InGaAs), Aluminum Gallium Arsenide (AlGaAs)
Technical Parameters
  • Wavelength of emitted laser light, typically in the visible or near-infrared range (e.g., 650nm, 780nm, 850nm) optimized for particle scattering efficiency (nm) Standard Spec
Components / BOM
  • Semiconductor Chip Part
    Active region where light emission occurs through electron-hole recombination
    Material: Gallium Arsenide (GaAs) or similar III-V compound semiconductor
  • Heat Sink Part
    Dissipates heat generated during operation to maintain stable performance and prevent thermal damage
    Material: Copper or Aluminum
  • Lens/Collimator Part
    Focuses and collimates the emitted laser beam for optimal illumination of the sampling volume
    Material: Glass or Optical Plastic
  • Package/Casing Part
    Protects the semiconductor chip from environmental factors and provides electrical connections
    Material: Ceramic or Metal

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Laser Diode.

laser diode for particulate matter sensor GaAs laser diode industrial sensors high-power laser diode optical manufacturing semiconductor laser for environmental monitoring precision laser diode electronic components

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Particulate Matter Sensor
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Laser scanner module
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Emitter Unit
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Laser Emitter Module
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Laser Emitter
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Laser Assembly
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Laser Transmitter
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Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Atmospheric to 1.5 bar (typical for sensor housings)
wavelength: 405nm to 1550nm (common ranges for PM sensors)
temperature: -40°C to +85°C (operating), -55°C to +100°C (storage)
current range: 10mA to 200mA (forward operating current)
optical power: 1mW to 100mW (typical for sensing applications)
Media Compatibility
✓ Clean air/gas streams ✓ Low-concentration particulate monitoring ✓ Controlled laboratory environments
Unsuitable: High-vibration industrial environments without proper isolation
Sizing Data Required
  • Required optical power output (mW)
  • Target wavelength for particle detection (nm)
  • Operating current/voltage specifications (mA/V)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Catastrophic Optical Damage (COD)
Cause: Excessive optical power density leading to localized overheating and melting of the semiconductor material, often due to current spikes, poor heat sinking, or contamination on the facet.
Gradual Output Power Degradation
Cause: Long-term defect propagation and dark line/spot formation within the active region, accelerated by high operating temperatures, current densities, and non-hermetic packaging allowing moisture ingress.
Maintenance Indicators
  • Significant, sudden drop in optical output power or efficiency during operation
  • Visible discoloration, darkening, or physical damage on the laser diode facet or window
Engineering Tips
  • Implement precise, stable current control with soft-start circuits and transient voltage suppression to prevent current spikes and thermal runaway.
  • Ensure optimal thermal management with properly sized, low-thermal-resistance heat sinks, maintain ambient temperature within specified limits, and use thermoelectric coolers (TECs) for high-power applications.

Compliance & Manufacturing Standards

Reference Standards
IEC 60825-1:2014 - Safety of laser products ISO 11146-1:2021 - Laser beam width, divergence angle and beam propagation factor ANSI Z136.1-2022 - Safe use of lasers
Manufacturing Precision
  • Wavelength: +/- 2 nm
  • Output power: +/- 5%
Quality Inspection
  • Spectral analysis for wavelength verification
  • Beam profile measurement for divergence and mode quality

Factories Producing Laser Diode

Manufacturer profiles with relevant production capability in China

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Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What makes laser diodes suitable for particulate matter sensors?

Laser diodes provide coherent, focused light beams essential for detecting and measuring microscopic particles through light scattering techniques, offering high precision and reliability in environmental monitoring applications.

How do materials like GaAs and AlGaAs affect laser diode performance?

Gallium Arsenide (GaAs) and Aluminum Gallium Arsenide (AlGaAs) materials determine the wavelength, efficiency, and thermal stability of laser diodes, with specific compositions optimized for different sensor requirements and operating conditions.

What are the key considerations when integrating laser diodes into optical products?

Critical factors include thermal management with proper heat sinks, precise optical alignment using collimators/lenses, wavelength compatibility with sensor optics, and robust packaging to ensure long-term stability in industrial environments.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data basis: CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks for Computer, Electronic and Optical Product Manufacturing.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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