Editorial Technical Reference

Light Source (e.g., Laser Diode)

This page explains how Light Source (e.g., Laser Diode) is classified within Computer, Electronic and Optical Product Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

An optical component that generates and emits light, typically coherent or specific-wavelength illumination, for sensing applications.

View Full Specifications Explore Manufacturing Sources

Product Specifications

Technical details and manufacturing context for Light Source (e.g., Laser Diode)

Definition
Within an Optical Sensor Head, the Light Source (e.g., Laser Diode) is the critical component responsible for generating the optical signal used for measurement, detection, or analysis. It provides the necessary illumination that interacts with the target, and the resulting reflected, transmitted, or scattered light is then captured and processed by other sensor elements (like detectors or photodiodes) to derive information about the target's properties, position, or state. This component is classified as a part-level product within the Computer, Electronic and Optical Product Manufacturing industry. The light source is typically a semiconductor-based device, such as a laser diode or an LED, which converts electrical energy into light. For a laser diode, the emitted light is coherent, monochromatic, and directional, making it suitable for precise sensing applications. Other types, like LEDs, produce incoherent, broader-spectrum light. The central wavelength is a key specification, measured in nanometers (nm), and must be matched to the sensor's design and the target's interaction characteristics. Materials commonly used include semiconductor compounds like Gallium Arsenide or Indium Phosphide, with metal casings and glass or epoxy lenses. When selecting a light source, verify the central wavelength and ensure it aligns with the sensor's requirements. Confirm the electrical and optical interfaces, such as drive current and output power, with the manufacturer. Regularly check for degradation in output intensity or wavelength drift, which may indicate aging or damage. Failure to maintain proper operation can lead to inaccurate sensor readings. Always consult the legal manufacturer for model-specific parameters and standards compliance.
Working Principle
The light source converts electrical energy into light energy. For a laser diode, this involves stimulating emission of photons through electron-hole recombination within a semiconductor p-n junction under forward bias, producing coherent, monochromatic, and directional light. Other light source types (e.g., LEDs) operate on similar electroluminescence principles but typically produce incoherent, broader-spectrum light. The emitted light interacts with the target, and the reflected or transmitted light is captured by the sensor's detector for analysis.
Common Materials
Semiconductor (e.g., Gallium Arsenide, Indium Phosphide), Metal (for casing/contacts), Glass/Epoxy (for lens/window)
Technical Parameters

What to specify in your RFQ

  • Central Wavelength - The primary wavelength of light emitted, critical for sensor compatibility and target interaction. in nm

These are the quantities to specify to the manufacturer when sizing or requesting a quote. The manufacturer's own documentation governs the exact figures and applicable standard.

Components / BOM
  • Semiconductor Chip Part
    The active region where electron-hole recombination generates light.
    Material: Semiconductor (e.g., GaAs, InP)
  • Package/Casing Part
    Provides mechanical protection, heat dissipation, and electrical connections.
    Material: Metal (e.g., TO-can), Ceramic, or Plastic
  • Lens/Window Part
    Shapes, collimates, or focuses the emitted light beam.
    Material: Glass, Plastic, or Epoxy
  • Lead Pins Part
    Provide electrical connections for power input.
    Material: Metal (e.g., Kovar, Copper alloy)

Applied To / Applications

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

Optical Sensor Head
View system integration details

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Atmospheric to 2 bar (typical for sealed packages)
other spec: Wavelength stability: ±0.1 nm, Output power: 1 mW to 500 mW, Beam divergence: 5° to 30°
temperature: -40°C to +85°C (operating), -55°C to +100°C (storage)
Media Compatibility
✓ Clean dry air/nitrogen environments ✓ Optical fiber coupling systems ✓ Vacuum-sealed optical assemblies
Unsuitable: High humidity/condensing environments without hermetic sealing
Sizing Data Required
  • Required wavelength (nm) and spectral width
  • Desired optical output power (mW) and modulation frequency
  • Beam quality requirements (M² factor) and divergence angle

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Catastrophic Optical Damage (COD)
Cause: Thermal runaway due to excessive current, poor heat sinking, or optical feedback causing localized overheating and melting of the semiconductor material.
Gradual Output Power Degradation
Cause: Dark line defect formation and facet degradation from electromigration, oxidation, or contamination over time, accelerated by high operating temperatures and current densities.
Maintenance Indicators
  • Significant, sudden drop in optical output power or complete failure during operation.
  • Visible discoloration, darkening, or physical damage (e.g., burn marks, cracks) on the laser diode facet or housing when inspected under appropriate magnification.
Engineering Tips
  • Implement strict current and temperature control: Use precision constant current drivers with soft-start circuits and maintain junction temperature well below the maximum rated value using active cooling (e.g., thermoelectric coolers) and proper thermal interface materials.
  • Prevent optical feedback and electrostatic discharge (ESD): Employ optical isolators and anti-reflection coatings to minimize back-reflections into the diode cavity, and enforce rigorous ESD protection protocols (grounding, handling, packaging) throughout the component's lifecycle.

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
IEC 60825-1:2014 - Safety of laser products ISO 11146-1:2021 - Laser beam parameters ANSI Z136.1-2022 - Safe use of lasers

Quoted from the published standard.

Manufacturing Precision
  • Wavelength: +/- 2 nm
  • Output power: +/- 5%
Quality Inspection
  • LIV (Light-Current-Voltage) testing
  • Beam profile analysis

Manufacturers of Light Source (e.g., Laser Diode)

Manufacturer profiles associated with Light Source (e.g., Laser Diode).

Sourcing Light Source (e.g., Laser Diode) from China?
Tell us your specification and target quantity — we will match it against manufacturer records and come back with the factories that fit.
Request manufacturers We manufacture this

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

Share this page

Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review · Page last updated 6 September 2026

Technical documentation
Request current drawings, revision history, and a signed specification sheet.
Manufacturing capability
Verify equipment lists, process limits, capacity, and representative production evidence.
Inspection readiness
Confirm test methods, calibrated equipment, sampling plans, and traceable reports.
Supplier transparency
Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Supply Chain Compatible Machinery & Devices

Industrial Smart Camera Module

The Industrial Smart Camera Module is a compact, self-contained vision processing unit designed for integration into industrial machinery and production lines.

Explore Specs →
Surface Mount Resistor

Passive electronic component for current limiting and voltage division in circuits

Explore Specs →
Surface Mount Capacitor

A surface mount capacitor is a fundamental electronic component used for energy storage, filtering, coupling, and decoupling in electronic circuits.

Explore Specs →
Surface Mount Technology (SMT) Pick-and-Place Machine

Automated machine that precisely places electronic components onto printed circuit boards.

Explore Specs →

Frequently Asked Questions

What is the primary function of a light source in an optical sensor?

It generates the optical signal that illuminates the target. The reflected, transmitted, or scattered light is then captured by other sensor elements to derive information about the target.

How do I select the correct light source for my sensor?

Verify the central wavelength (in nm) matches your sensor's design and target interaction. Also confirm electrical and optical interfaces with the manufacturer.

What materials are typically used in a light source?

Semiconductor materials like Gallium Arsenide or Indium Phosphide, with metal casings and glass or epoxy lenses.

What maintenance or failure signs should I watch for?

Monitor for reduced output intensity or wavelength drift, which may indicate aging or damage. Always follow manufacturer guidelines.

Data basis: editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

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.
Buyer enquiry

Request manufacturing insight for Light Source (e.g., Laser Diode)

Ask for use case, specification boundaries, supplier type, and RFQ preparation information for this product.

Where it goes
Straight to the CNFX editorial desk, and to the manufacturer if this product is linked to a claimed profile. Nothing is broadcast to a supplier list.
Your details stay here
We do not sell or rent enquiry data, and we do not add you to a mailing list. Used only to answer this request.
No commission, no middleman
CNFX is a directory. We take no cut of any order and never negotiate on a supplier's behalf.
What we don't claim
A listing is not an endorsement. Qualify every supplier and verify every figure yourself before ordering.

Your business information is used only to process this request.

Thank you! Your message has been sent. We'll respond within 1–3 business days.
Sorry, we couldn't send your message. Please try again, or email us at [email protected].

Need to Manufacture Light Source (e.g., Laser Diode)?

Compare manufacturer profiles with relevant product and process capability.

Create Manufacturer Profile Contact Us
Previous Product
XY Positioning Stage
Last Product
Get QuotesChat