We all know that the market share of green laser diode is very large, so do you know where the green laser diode is mainly used? Many people will ask us, did QSI make a green laser diode? Today, Xiaobian will give you an answer.

In recent years, with the continuous progress of semiconductor laser technology, the application scope of laser diode is increasingly extensive. Among them, green laser diode, with its unique wavelength characteristics and excellent optical performance, is gradually becoming the focus of scientific research, industry and consumer markets. As one of the world-renowned semiconductor laser manufacturers, South Korea QSI has been deeply involved in the field of laser diodes, and has shown a trend of active exploration and steady progress in the layout of green products.

I. Technical characteristics of green laser diode

Laser diode is a kind of light source which uses semiconductor materials to realize stimulated radiation. Compared with red and blue light diodes, green laser diodes have higher visibility and visual comfort because their wavelengths are mostly in the range of 515nm-540nm, which is close to the peak of human visual sensitivity (about 555nm). Under the same optical power, green light is easier to be recognized by human eyes than red light and blue light, which provides natural advantages for it in various application scenarios.

From a technical point of view, green laser diodes have the following remarkable characteristics:

1. High brightness and high contrast: Under the same power, the visual effect of green light is 2-3 times higher than that of red light.

2. Wider application band: Common central wavelengths are 515nm, 520nm, 525nm, 532nm, etc., which can meet the diverse needs of scientific research and application.

3. Small size and high efficiency: Compared with the traditional green laser obtained by frequency doubling, the direct-emitting green laser diode has a higher energy efficiency ratio and a more compact packaging form.

4. The development is still accelerating: green laser diode has higher requirements on crystal materials and epitaxial process, and its overall industrialization is later than that of red and blue light, but it has made breakthrough progress in recent years.

Second, the main application fields of green laser diode

The application of green laser diode covers many fields, such as industry, scientific research, medical treatment, consumer electronics and so on. The following are some representative directions:

1. Laser projection and display technology

Green light is a key component of high-quality full-color laser display system. In laser projector, laser tv and AR/VR head display, green laser diode, red light and blue light together form tricolor light source. Because the human eye is more sensitive to green light, it plays a vital role in improving the projection brightness and color saturation.

2. Laser ranging and positioning equipment

Green laser diode is widely used in laser rangefinder, laser levels and other engineering measuring equipment. Compared with red light, green light has higher visibility in strong light environment, especially suitable for outdoor measurement, and engineers can clearly observe the light spot under direct sunlight, which greatly improves the practicability.

3. Medical and biological testing

The green band coincides with the absorption peaks of some biological tissues and fluorescent substances, so it is often used in microscopic imaging, fluorescence excitation, biological detection and medical diagnosis and treatment equipment. For example, green laser can be used to excite some fluorescent dyes and help researchers achieve high-precision cell imaging.

4. Optical communication and scientific research experiment

In certain free-space optical communication experiments, green laser is used because of its propagation characteristics and visibility. In addition, universities and scientific research institutions also use a large number of green laser diodes in optical experiments, optical detection and other fields.

5. Consumer Electronics and Emerging Applications

Green laser has gradually entered the consumer market: it can be seen in laser pens, stage lighting, holographic projection and laser entertainment equipment. With the increasing demand for miniaturized and high-brightness light sources in consumer electronics, the application space of green laser diodes is constantly expanding.

Third, QSI's exploration in the field of green laser diodes

As a well-known semiconductor laser manufacturer in South Korea, QSI has continuously expanded its product line in recent years, which has obvious advantages in red light, near infrared and high-power laser diodes and has a good market reputation. Regarding the green laser diode, QSI also shows a forward-looking strategic layout.

1. R&D investment continues to increase.

QSI knows the potential of green laser technology in the global market. In recent years, the company has cooperated with a number of scientific research institutions, focusing on tackling the epitaxial growth and chip manufacturing problems of green laser diodes and accelerating the process of productization.

2. Product situation at this stage

QSI's main mass-produced products are still mainly red and near-infrared laser diodes, covering laser printing, medical equipment, laser radar, industrial processing and other directions. For green laser diodes, QSI has not formed mass production, but it has been demonstrated in exhibitions and R&D cooperation projects and samples have flowed out.

3. Market prospect

With the rapid growth of the demand for green light in laser display, ranging and medical detection markets, QSI is expected to gradually realize the industrialization of green laser diodes in the next 2-3 years. With its accumulation in chip technology, packaging and quality control, QSI has strong competitive potential in this segment.

Green laser diode has a broad and solid application foundation in the fields of projection display, precision measurement, biomedical and consumer electronics because it is close to the peak value of human visual sensitivity. With the breakthrough of related technologies, the market demand for green laser diodes will continue to expand.

QSI, as an internationally renowned laser diode manufacturer, is still in the research and development stage of green light products, but its deep accumulation in the field of semiconductor lasers makes it possible to make rapid efforts in this emerging market. In the future, if QSI can successfully launch stable and reliable green laser diode products, it will bring more choices to users around the world and push the whole industry to a new development height.

With the continuous maturity of green laser diode, it will play an increasingly important role in scientific and technological innovation and industrial application, and QSI will also play an active role in this wave.