Laser Diodes

Laser diodes are semiconductor devices which closely resemble an LED (light emitting diode). Unlike standard LEDs, laser diodes emit coherent, single-wavelength light in a tightly focused beam, delivering greater precision and intensity for applications where accuracy and output power matter.

RS Australia stocks a broad range including infrared laser diodes, SMD laser diodes, blue laser diodes, green laser diodes, high-power laser diodes, and VCSEL types, covering wavelengths from the visible spectrum through to near-infrared.

Key Uses of Laser Diodes

Laser diodes are specified across electronics, industrial, and scientific applications due to their compact form factor and precise light output. Key performance characteristics include:

• Precision and Coherent Light Output: Laser diodes emit a single-wavelength, focused beam well suited to high-accuracy sensing, measurement, and data reading applications.
• Compact Semiconductor Design: The small form factor suits integration into portable and embedded systems, from handheld devices to industrial control modules.
• Wide Laser Diode Colour Range: Available wavelengths span infrared through to visible red, green, and blue laser diode variants, covering a broad range of application requirements.
• High-Speed Modulation: Laser diodes support fast switching speeds for data transmission and optical sensing where rapid signal modulation is needed.
• Low Power Consumption: Compared to gas or solid-state laser alternatives, laser diodes offer energy-efficient light output suited to battery-powered and low-energy embedded designs.

Shop Range of Laser Diodes Australia

RS Australia classifies its laser diode range by wavelength, mount type, output power, and laser type. Mount options include SMD laser diode and through-hole formats, 3-pin laser diode configurations, and VCSEL types. Laser diode colours span visible and near-infrared wavelengths. Laser diodes share characteristics with semiconductor light sources used in both LED and OLED displays, though they produce a far more focused, coherent beam.

Infrared (IR) Laser Diode

IR laser diodes and infrared laser diodes operate beyond the visible spectrum, widely used in remote sensing, fibre optic communications, proximity detection, and barcode scanners — common requirements across Australia's logistics, mining, and industrial automation sectors.

• Peak wavelength: 780–980nm
• Common uses: fibre optic communications, proximity sensors, barcode readers, remote sensing

Blue Laser Diode

The shorter wavelength of blue laser diodes enables higher data density reading and writing, making them the standard component in Blu-ray systems. Additional applications include laser engraving, scientific instrumentation, and display devices.

• Peak wavelength: 400–500nm
• Common uses: Blu-ray disc systems, laser engraving, scientific instruments, display devices

Green Laser Diode

Green laser diodes emit at a wavelength highly visible to the human eye, making them well suited to laser pointers, alignment tools, surveying equipment, and medical devices where a clearly visible beam is needed.

• Peak wavelength: 520–532nm
• Common uses: laser pointers, alignment tools, surveying, medical devices

High Power Laser Diode

High-power laser diodes deliver output from 100mW through to multiple watts for industrial material processing, laser cutting, engraving, solid-state laser pumping, and medical systems including photodynamic therapy.

• Output power: 100mW to multiple watts
• Common uses: industrial cutting, material processing, solid-state laser pumping, medical systems

How to Choose the Right Laser Diode for Your Needs

Selecting the correct laser diode depends on application requirements, operating environment, and integration constraints. Consider the following:

• Wavelength: Match wavelength to the application. Infrared laser diodes suit sensing and fibre optic communication; blue and green laser diodes suit visible output tasks; red laser diodes suit general pointing and reading.
• Output Power: Low milliwatt output suits pointing, scanning, and sensing. High-power laser diodes suit industrial cutting, engraving, and medical applications requiring higher energy delivery.
• Mount Type: SMD laser diodes suit PCB-level integration in compact assemblies. Through-hole and 3-pin laser diode packages suit prototyping and module-level designs.
• Laser Type: Standard laser diodes emit from the chip edge. VCSEL types emit from the surface, suiting array configurations and high-speed data links.
• Operating Temperature: Verify rated temperature ranges against the deployment environment, particularly for outdoor and industrial installations across Australia's varied climate zones.
• Package and Pin Configuration: Confirm package format and pin layout compatibility with the driver circuit, heatsink, and enclosure design before specifying.

Common Industry Applications for Laser Diodes

Laser diodes are used across a wide range of industries in Australia, from telecommunications infrastructure to industrial manufacturing and scientific research:

• Telecommunications: Infrared laser diodes transmit data through fibre optic cables, supporting high-bandwidth communications across Australia's national networks.
• Consumer Electronics: Blue laser diodes enable Blu-ray disc reading and writing in consumer and commercial AV equipment.
• Medical and Life Sciences: Laser diodes are used in diagnostics, photodynamic therapy, and surgical instruments across Australia's healthcare and research facilities.
• Industrial Manufacturing: High-power laser diodes drive laser cutting, engraving, and marking systems in manufacturing and fabrication environments.
• Sensing and Measurement: IR laser diodes underpin LiDAR, range-finding, proximity sensing, and barcode scanning across logistics, mining, and industrial automation in Australia.
• Research and Science: Laser diodes are used in spectroscopy, atomic physics, and laser cooling experiments across Australian universities and research institutes.
• Consumer and Retail: Green laser diodes power presentation tools, alignment devices, and retail display equipment across commercial settings.

Your Trusted Laser Diode Supplier in Australia

RS Australia is a trusted distributor of laser diodes from leading manufacturers, stocking a broad range including IR laser diodes, SMD laser diodes, high-power laser diodes, and VCSEL types for industrial, scientific, and commercial applications. The range includes laser diodes from ROHM, ams OSRAM, and Wurth Elektronik, covering standard and specialist specifications with fast Australia-wide delivery and technical support.

Beyond laser diodes, RS Australia stocks a comprehensive range of laser modules and components, including laser modules, laser detectors, and laser drivers, covering complete laser system component requirements.

Buy laser diodes online in Australia from RS. For delivery timeframes and fees, visit our Delivery page.