Near infrared diode, as a key component in the field of optoelectronics, has been widely used in various applications such as optical communication, medical diagnosis, and industrial automation. This article will introduce the industry of near infrared diodes, including their working principle, types, applications, and market trends.

Working Principle of Near Infrared Diode

A near infrared diode is a semiconductor device that emits near infrared light when an electric current is applied. The working principle of a near infrared diode is based on the semiconductor physics. When electrons and holes in the semiconductor material are injected, they recombine and release energy in the form of photons. The wavelength of the emitted light is determined by the energy band gap of the semiconductor material. The typical materials used for near infrared diodes include gallium arsenide (GaAs), gallium phosphide (GaP), and indium gallium arsenide phosphide (InGaAsP). These materials have different energy band gaps, which determine the emission wavelength of the near infrared diode.

Types of Near Infrared Diodes

According to the emission wavelength, near infrared diodes can be divided into three types: short-wavelength near infrared diodes, medium-wavelength near infrared diodes, and long-wavelength near infrared diodes. 1. Short-wavelength near infrared diodes: The emission wavelength is between 0.7μm and 1.3μm. They are commonly used in optical communication, such as fiber optic communication. 2. Medium-wavelength near infrared diodes: The emission wavelength is between 1.3μm and 1.6μm. They are widely used in medical diagnosis, such as optical coherence tomography (OCT) and fluorescence imaging. 3. Long-wavelength near infrared diodes: The emission wavelength is between 1.6μm and 3.0μm. They are mainly used in industrial applications, such as infrared thermography and laser marking.

Applications of Near Infrared Diodes

Near infrared diodes have a wide range of applications due to their excellent performance and stability. The following are some typical applications: 1. Optical communication: Near infrared diodes are used as light sources in optical communication systems, such as fiber optic communication, to achieve high-speed data transmission. 2. Medical diagnosis: Near infrared diodes are used in medical imaging and diagnosis, such as OCT, fluorescence imaging, and biophotonics, to detect and analyze biological tissue. 3. Industrial automation: Near infrared diodes are used in industrial applications, such as infrared thermography, laser marking, and non-destructive testing, to achieve high-precision and high-efficiency detection and processing. 4. Consumer electronics: Near infrared diodes are used in consumer electronics, such as remote controls, optical storage, and barcode scanning, to achieve wireless communication and data transmission.

Market Trends of Near Infrared Diodes

The market of near infrared diodes has been growing rapidly in recent years, driven by the continuous development of optoelectronics, medical, and industrial fields. The following are some market trends: 1. High-power and high-efficiency: With the development of optoelectronics technology, high-power and high-efficiency near infrared diodes have become a research and development direction. 2. Miniaturization and integration: The miniaturization and integration of near infrared diodes can improve the performance and reduce the cost of optoelectronic devices. 3. Green and environment-friendly: The development of green and environment-friendly near infrared diodes is becoming more and more important, which is conducive to the sustainable development of the industry. 4. Application innovation: The continuous innovation of near infrared diode applications will promote the expansion of the market scale. In conclusion, near infrared diodes have become an important component in the optoelectronics industry. With the continuous development of technology and market demand, the application and market scale of near infrared diodes will continue to expand.