What is a diode array detector? The basic structure, advantages and disadvantages, working principle, application, classification, operating procedures, and development history of diode array detectors 2

3、 Working principle:

The working principle of a diode array detector is based on the photoelectric effect. When light shines on a diode, the energy of photons is converted into the energy of electrons, thereby generating an electric current on the diode. This current signal is amplified and converted into a digital signal, which is then processed and analyzed by a computer. Different wavelengths of light can be detected and recorded through different diodes.

4、 Application:

diode array detectors are widely used in spectroscopic measurements in analytical chemistry, such as infrared spectroscopy, ultraviolet spectroscopy, and fluorescence spectroscopy. It can be used to analyze the composition, concentration, mass, and reaction kinetics of substances.

5、 Category:

According to their different structures and working principles, they can be divided into the following categories:

1. PN junction diode array detector: an array composed of multiple PN junction diodes, each diode can work independently, with high sensitivity and low noise. Suitable for fields such as high-speed optical communication and fiber optic sensing.

2. Piezoelectric diode array detector: using piezoelectric effect to convert optical signals into charge signals. It has fast response, high sensitivity, and broadband characteristics, suitable for high-speed optical communication and fiber optic sensing fields.

3. Photodiode array detector: an array composed of multiple photodiodes, each of which can work independently. It has the characteristics of high-speed response, high sensitivity, and low noise, and is suitable for high-speed optical communication and imaging fields.diode

4. APD array detector: using a PN junction doped with high concentration, amplifying the optical signal through avalanche effect. It has the characteristics of high sensitivity, low noise, and fast response, and is suitable for low light level detection and high-speed communication fields.diode