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Laser Diodes, Laser Modules

Category Introduction

Laser Diodes and Modules are semiconductor devices that can emit a beam of high intensity focused radiation, typically in the infrared, visible or ultraviolet wavelength ranges of the electromagnetic spectrum, coherently (light waves of the same wavelength, phase and direction). With power ranges from less than 1 milliwatt to multiple watts of peak optical power, and a wide range of input voltage, current and case sizes, there are items for nearly all applications.

Product List

1 Items
PDF Mfr Part # Quantity
Available		 UnitPrice RFQ Series Packaging Product StatusWavelengthVoltage - InputCurrent Rating (Amps)Power (Watts)Package / Case
QSB34GR_SN00349
QSB34GR_SN00349
PIN PHOTODIODE
Fairchild Semiconductor
 200 $0.00
Bulk Active-----

About Laser Diodes, Laser Modules

What are Laser Diodes, Laser Modules?

Laser Diodes, Laser Modules

Laser diodes and laser modules are pivotal components in the field of optoelectronics, serving as compact and efficient sources of coherent light. A laser diode is a semiconductor device that emits laser light when an electric current passes through it. It operates on the principle of stimulated emission, where electrons in a semiconductor material are excited to a higher energy level and then release photons as they return to their ground state. Laser modules, on the other hand, are assemblies that include a laser diode along with additional components such as optics, cooling systems, and power supplies, designed to enhance performance and facilitate integration into various applications.

Types of Laser Diodes, Laser Modules

1. Single-Mode Laser Diodes

Single-mode laser diodes emit light with a single spatial mode, resulting in a narrow beam and high beam quality. They are commonly used in applications requiring precise and focused light, such as fiber optic communications and high-resolution printing.

2. Multi-Mode Laser Diodes

Multi-mode laser diodes produce light with multiple spatial modes, leading to a broader beam and higher power output. These are suitable for applications like laser cutting, welding, and illumination, where beam quality is less critical than power.

3. Quantum Cascade Lasers

Quantum cascade lasers are a type of semiconductor laser that emits in the mid-infrared to terahertz range. They are used in gas sensing, spectroscopy, and environmental monitoring due to their ability to target specific molecular absorption lines.

4. Vertical-Cavity Surface-Emitting Lasers (VCSELs)

VCSELs emit light perpendicular to the surface of the semiconductor chip, offering advantages in terms of manufacturing and integration. They are widely used in data communication, 3D sensing, and laser printing.

How to choose Laser Diodes, Laser Modules?

When selecting laser diodes and modules, several key parameters should be considered:

  • Wavelength: Choose based on the application's requirements, such as the material to be processed or the medium to be sensed.
  • Output Power: Determine the necessary power level for the application, balancing between efficiency and thermal management.
  • Beam Quality: Consider the beam divergence and mode structure, especially for applications requiring precision.
  • Reliability and Lifespan: Evaluate the manufacturer's reputation, product reviews, and warranty terms to ensure long-term performance.
  • Environmental Factors: Assess the operating temperature range, humidity resistance, and any specific installation requirements.

Evaluating product quality involves reviewing datasheets, certifications, and conducting performance tests. It's also crucial to consider the supplier's support services, including technical assistance and after-sales service.

Applications of Laser Diodes, Laser Modules

1. Telecommunications

In the telecommunications industry, laser diodes are integral to fiber optic communication systems, providing the light source for data transmission over long distances with minimal loss and high bandwidth.

2. Medical Devices

Laser modules are used in various medical applications, including surgical procedures, dermatology, and ophthalmology, where precision cutting, coagulation, and tissue ablation are required.

3. Industrial Manufacturing

In manufacturing, laser diodes are employed for cutting, welding, and marking materials. Their precision and efficiency make them ideal for applications in automotive, aerospace, and electronics industries.

4. Consumer Electronics

Laser diodes are found in consumer electronics such as CD/DVD/Blu-ray players, barcode scanners, and laser printers, where they facilitate data reading, scanning, and printing processes.

5. Environmental Monitoring

Laser modules, particularly quantum cascade lasers, are used in environmental monitoring for detecting and analyzing gases, providing critical data for pollution control and climate research.