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You are here: Home / Applications / Medical Applications / Dual wavelength (1064nm 532nm) laser for medical applications

Nd:YAG lasers have high gain, low threshold, high quantum efficiency, and small thermal effects. Nd:YAG lasers output laser light at 1064 nm and 532 nm can be widely used in the medical field. 1064nm laser can be used for laser hair removal, and 532nm green light can be used for treating vascular skin lesions.

Theotry

Dual wavelength (1064nm 532nm) laser for medical applications(Nd:YAG Laser Crystal,LiNbO3 Laser Electric-Optic Q-Switch Crystal,LBO Nonlinear Crystal)

The main components of device are:

Gain medium - Nd YAG

The working substance of Nd:YAG laser is a YAG crystal doped with a certain amount of Nd3+. The laser is a four-level system with an output wavelength of 1064 nm. Under normal operating conditions (room temperature), the 1064 wavelength laser is the most easy to start and has the strongest oscillation.

LN crystal has high nonlinear coefficient which makes it ideal for the production of integrated optics. The electro-optic Q-switched crystal and the laser crystal are driven by the same driving source, and when the voltage is applied, the state is low Q, when the voltage is removed,there is high Q state.

E-O Q-switch:LiNbO3

LBO Frequency conversion

The LBO crystal is a negative biaxial crystal with a light transmission range of 160 to 2600 nm, good physical and chemical properties, and high damage threshold. It can be used in light at 1064 nm to obtain 532 nm as a frequency doubling crystal.

Mirror——M1, M2-Gaussian mirror. M5-output wavelength.

Electric machine——When a 1064nm laser is required, the LBO crystal can be controlled by the electric machine to move out of the optical path, and the fundamental frequency light is amplified by the Nd:YAG laser and directly outputted through the light guide arm. When a 532 nm laser is required, the electric machine controls the LBO crystal to move into the optical path.

The position of the LBO frequency doubling crystal is controlled by the electric machine, and the output wavelength of both 1064 nm and 532 nm is realized on one laser. Among them, 1064nm laser can be used for laser hair removal, and 532nm green light can be used for treating vascular skin lesions.

Feature

  • Deep penetration in biological tissue
  • Small thermal burns
  • Good coagulation and hemostasis
  • Small size and high reliability
  • Work in continuous or pulse mode

Application

  • Treatment Of Deep Pigmentation Of The Skin

According to the principle of selective photothermolysis, the wavelength of 1064nm laser can penetrate deeper into the skin and be absorbed by the dark pigment cells, thereby it can more effectively removing darker or inflamed tissues, and is widely used in various fields of today’s medicine.

  • Treating Freckles

After 1064nm laser light being frequency doubled,it will produce 532nm green laser. The 532nm laser light is effective for brown and red skin damage and pigment treatment. It can be used to treat freckles with small side effects, easy operation and no scar.

  • Treatment Of Vascular Skin Lesions

In the treatment of vascular skin lesions, because the pulse width of the 532nm laser can be adjusted, in the clinical medical process, lasers with different pulse widths can be selected according to the actual situation of clinical treatment, which can realize flexible treatment and greatly reduce the mechanical traction of blood vessels,thus avoiding the formation of purple epilepsy due to subcutaneous bleeding.

Reader Interactions

Comments

  1. s says

    August 12, 2019 at 11:33

    hi …
    i have a question … how i can choose Specification of laser(fluence,delay,wavelength ,…) for the best effect on the vascular lesions???

    Reply
    • Laser-CryLink says

      August 14, 2019 at 13:19

      This involves the medical field, which should be based on clinical trials. You can go find relevant articles published and some survey reports in the medical field, you may get some useful information.

      Reply

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