Application of semiconductor laser in medical field

Application of semiconductor laser in medical field
Semiconductor laser is a kind of laser with semiconductor material as the gain medium, usually with natural cleavage plane as the resonator, relying on the jump between semiconductor energy bands to emit light. Therefore, it has the advantages of wide wavelength coverage, small size, stable structure, strong anti-radiation ability, various pumping modes, high yield, good reliability, easy high-speed modulation and so on. At the same time, it also has the characteristics of poor output beam quality, large beam divergence Angle, asymmetrical spot, poor spectral purity and difficult process preparation.

What are the technical progress and application cases of semiconductor lasers in laser medical treatment?
The technical progress and application cases of semiconductor lasers in laser medicine are very extensive, covering many fields such as clinical treatment, beauty, plastic surgery and so on. At present, on the official website of the State Drug Administration, many semiconductor laser treatment devices developed by domestic and foreign companies have been registered in China, and their indications involve a variety of diseases. The following is a detailed introduction:
1. Clinical treatment: semiconductor lasers are widely used in biomedical research and clinical disease diagnosis and treatment because of their small size, light weight, long life and high conversion efficiency. In the treatment of periodontitis, the semiconductor laser generates high temperature to make the infected bacteria gasification or destroy their cell walls, thereby reducing the number of pathogenic bacteria, cytokines, kinin and matrix metalloproteinases in the bag, to achieve the effect of treating periodontitis.
2. Beauty and plastic surgery: The application of semiconductor lasers in the field of beauty and plastic surgery is also continuing to expand. With the expansion of wavelength range and the improvement of laser performance, its application prospects in these fields are more broad.
3. Urology: In urology, 350 W blue laser beam combining technology is used in surgery, improving the accuracy and safety of surgery.
4. Other applications: Semiconductor lasers are also used in medical diagnosis and biological imaging fields such as flow cytometry, confocal microscopy, high-throughput gene sequencing and virus detection. Laser surgery. Semiconductor lasers have been used for soft tissue excision, tissue bonding, coagulation and vaporization. General surgery, plastic surgery, dermatology, urology, obstetrics and gynecology, etc., are widely used in this technology laser dynamic therapy. The photosensitive substances that have affinity to the tumor are selectively gathered in the cancer tissue, and through the semiconductor laser irradiation, the cancer tissue produces reactive oxygen species, aiming to cause its necrosis without damaging the healthy tissue. Life science research. “Optical tweezers” using semiconductor lasers, which can seize live cells or chromosomes and move them to any location, have been used to promote cell synthesis, cell interaction and other research, and can also be used as a diagnostic technology for forensic forensics.