Being made with long wavelength of 1064nm, the real use of a infrared laser diode enables high density and highly powerful infrared laser light source emission for all optical communication system, high precision raw material processing, and biomedical field effectively.
With the process of constant optical communication technology development towards high speed and large capacity, 1064nm infrared laser diode can be used to transmit and receive optical signals, providing a stable infrared laser light source from optical communication systems. In practical precise laser processing, it can achieve higher precision and higher efficiency raw material processing, fulfilling the manufacturing industrial need with high precision processing. When it is used for biomedical field, together with in-depth study of the optical properties of biological tissues, 1064nm infrared laser is playing a great role in biological imaging, disease diagnosis and laser medical treatment work etc.
Structures of 1064nm infrared laser diodes:
Single-photon avalanche 1064nm laser diode: The separated absorption-charge multiplication (SACM) structure is used to separate the absorption region and the multiplication region, which can more control the electric field distribution effectively. The double zinc diffusion technology is used to form the multiplication region and the guard ring region, which can reduce the possibility of edge collapse. Back-illuminated design is often used, with the n-type contact layer on the top surface and light irradiated from the back to avoid the top metal layer blocking the incident light.
DFB laser diode: 1064nm IR laser diode has a distributed feedback structure. By setting periodic Bragg gratings on both sides of the active area, optical feedback is provided to achieve single-frequency laser output.
DBR laser diode: The Bragg grating acts as a reflector, a doped fiber is encapsulated between two sections of the Bragg grating, and gain is provided by pumping the doped fiber in the middle.
Performance of 1064nm infrared laser diode:
Utilizing 1064nm as its central wavelength, this IR laser diode is among the infrared band, and has good penetration and low atmospheric absorption and scattering. Available with single mode or multi mode type, it gets different output power, continuous infrared laser light emission. The pulse IR light peak power can reach several kilowatts or even higher.
Featured by narrow line width, fiber coupled DBR 1064nm infrared laser can reach ultra fine line width of 3MHz. It achieves high speed modulation, and the modulation frequency can reach several GHz.
Advantages and disadvantages
Advantages: 1064nm infrared laser diode has high conversion efficiency and can efficiently convert electrical energy into light energy. It gets small size, light weight, compact structure, easy to integrate and install, which provides high reliability, long service life, and can work in harsh environments. It always makes fast response speed, high-speed optical signal modulation and transmission.
Disadvantages: The output power is relatively limited and it is difficult to meet the needs of some high-power applications; it is sensitive to the working temperature and needs to be equipped with a temperature control device; the beam quality is relatively poor, and there is a certain divergence angle and mode distortion.
Applications:
Laser processing: long wavelength 1064nm infrared laser diode is used for cutting, welding, punching, surface treatment, etc. of metal materials, which can achieve high-precision and high-efficiency processing.
Optical communication: 1064nm infrared laser diode is used as a light emission source for long-distance optical fiber communication systems, optical signal transmission, and exchange in optical networks.
LiDAR: it can be used for distance measurement and target detection in the fields of autonomous driving, mapping and environmental monitoring.
Biomedicine: ultra compact size tube made 1064nm laser diode is used for imaging and disease diagnosis of biological tissues, laser treatment work of freckle removal, hair removal, and treatment of vascular diseases.
Scientific research fields: used for spectroscopy research, quantum optics experiments, nonlinear optics research, etc.