What is work principle of 1064nm SM(Single Mode) Infrared Laser Diode?

Stimulated radiation: In the active area of the 1064nm SM infrared laser diode, a large number of electrons are caused to transition to high energy levels by injecting current, forming a population inversion distribution. When a photon of suitable energy is incident, it will induce the electrons at the high energy level to transition to the low energy level and radiate photons with the same frequency, phase and polarization state as the incident photon, thus achieving light amplification.

Optical resonant cavity: It is composed of reflectors or Bragg reflectors at both ends of the 1064nm SM infrared laser diode, which can make the stimulated radiation light reflect multiple times in the cavity to form a stable oscillation. Only light with a wavelength of 1064nm that meets the resonance conditions can be enhanced and output.

Structure:

Active region: It is the core part of 1064nm SM infrared laser diode, composed of semiconductor materials such as gallium aluminum arsenide (GaAlAs), where electrons and holes recombine to generate photons. Its material and structural design determine the luminescence characteristics of the diode.

Limiting layer: Located on both sides of the active region, it uses semiconductor materials with a wide band gap to limit carriers and photons in the active region, improve luminescence efficiency and limit light field distribution, so that it can better achieve single-mode output.

Electrode: It includes P-type electrode and N-type electrode, which are used to inject current, provide energy to the active region, realize particle number inversion and stimulated radiation, and are usually made of metal materials and connected to external circuits.

Optical window: Located on the light-emitting surface of the 1064nm SM infrared laser diode, it needs to have high transmittance for light with a wavelength of 1064nm. It is generally treated with special optical coating to reduce reflection and improve light output efficiency.

1064nm SM(single-mode) infrared laser diodes have important applications in a large variety of work fields, the following are some of the main aspects:

Medical fields:
Laser treatment: 1064nm SM laser diode is commonly used to treat darker tattoo colors, such as black, blue and green, and can also be used to treat deep pigmentation lesions to target melanin, treat epidermal-dermal lesions, etc.
Blood flow rate measurement: For example, time-gated diffuse correlation spectroscopy (TG-DCS) can use 1064nm wavelength to measure blood flow rate.

Industrial field
Laser processing: 1064nm SM laser diode is used as a laser seed source, which can be applied for laser micro-processing, realizing material cutting, welding, drilling and other operations. Featured by high energy density and good focusing ability, this 1064nm wavelength can ensure the processing accuracy and quality.
Target indication: The infrared laser light source emitted by the 1064nm single-mode diode has low transmission loss and good directionality in the atmosphere. It can be used to make target indication equipment and provide accurate target indication for weapon systems.

Scientific research field
Raman spectroscopy: In the fields of chemistry and materials science, 1064nm SM infrared laser diode can be used to stimulate Raman scattering to help study information, such as the molecular structure and chemical bonds of substances.
Light detection and ranging (LiDAR): This wavelength of 1064nm has low scattering and absorption characteristics in long-distance transmission, which is suitable for LiDAR systems and can be used for autonomous driving, mapping and environmental monitoring.

Communications field
Free space communications: 1064nm wavelength infrared laser light beams are not easily affected by the atmosphere, and are suitable for free space communications, such as satellite communications and ground optical communications. It can achieve high-speed and large-capacity information transmission.

Fiber optic communications: 1064nm SM laser beam can be used as a light source in a fiber optic communication system. Its single-mode characteristics can ensure that optical signals are transmitted efficiently and with low loss in optical fibers, thereby improving the distance and quality of communications.

According to correct use of output power within 60mW, 80mW, 100mW, 200mW, and proper package type, this 1064nm SM infrared laser diode can meet your need perfectly for any possible application field.