Disclosed is an apparatus and a method to preserve linearly polarized laser beam when it passes through a freely twisting beam delivery system such as an articulated arm. The polarization of the output beam from the delivery system will be stable and the same as the polarization of the input beam to the delivery system, and can be used to pump anisotropic laser crystals as well as nonlinear optical crystals.

The invention provides a light therapy device for providing therapeutic treatment to a user's body, wherein the user may be a person or an animal. The device is using a light projection method for treating the body problems and/or skin disorders. Further, the device is having a rotatable assembly that automatically follows the movement of the desired area of the body needs to be treated. The device uses artificial intelligence, machine learning, localization modules, object detection module, image processing module, and 3D-mapping to automatically identify and treating the desired area of the body. Furthermore, the user can manually identify, select and prioritize desired treatment portion and can select the type of treatment required.

A medical laser system including a first laser source having a first gain medium for generating a first optical field. The system further includes a first Q-switch controlling a resonance quality of the first laser source, a control circuit controlling the first Q-switch to cause the first laser source to generate the first optical field as a first pulse train of laser pulses, a second laser source for generating a second optical field as a second pulse train of laser pulses, a nonlinear medium for generating a third optical field by a nonlinear interaction between the first optical field and the second optical field, and a sensor detecting a property of at least one of the optical fields. The control circuit controls operation of the first Q-switch so as to adjust a relative timing of the laser pulses of the first pulse train and the laser pulses of the second pulse train responsive to the detected property.

A laser apparatus according to the present invention may comprise: a plurality of reflection mirrors which form a resonance path so as for light to be amplified by an induced emission; a medium having a first surface which forms a vertical surface with respect to the resonance path, and a second interface which does not form a vertical surface with respect to the resonance path, and absorbs energy from a light source and amplifies and emits the light; and a saturable absorber having a second surface which forms a vertical surface with respect to the resonance path, and a second interface which does not form a vertical surface with respect to the resonance path, and generates ultrashort pulses. The laser apparatus according to the present invention has the effects of cutting a saturable absorber having a specific crystallographic axis to thereby make polarization capacity in one direction advantageous and minimize propagation loss. In addition, the laser apparatus according to the present invention has the effect of maximizing transmittivity maintenance capacity of polarization orientation in one direction by arranging a medium and a saturable medium so as to have a specific inclined plane.

A pain relief device and method or system to aid in the resolution of pain in a body including at least one layer of PVDF film and at least one other layer for directional purposes, as well as a polarizing layer. The device can be packaged in various ways. Also described is a device that uses a combination of LED bulbs, polymer based materials and a near field accelerator to provide pain relief.

Disclosed is an apparatus and a method to preserve linearly polarized laser beam when it passes through a freely twisting beam delivery system such as an articulated arm. The polarization of the output beam from the delivery system will be stable and the same as the polarization of the input beam to the delivery system, and can be used to pump anisotropic laser crystals as well as nonlinear optical crystals.

A device (10) for energy-based skin treatment is provided. The device (10) comprises a light source (18) for providing polarized incident light (21) having an incident polarization, optical elements (11, 12, 13) for focusing the polarized incident light (21) in a focal point (22) within a collagen layer of the skin (30), a polarization-sensitive detection unit (41, 42) for selectively detecting a selected polarization component of light of a generated harmonic (23) of the polarized incident light (21) returning from the skin (30), and a processor, at least being coupled to the polarization-sensitive detection unit (41, 42), for determining a depth of the focal point (22) within the collagen layer based on the detected selected polarization component.

An apparatus and method for optical skin treatment procedures and in-treatment monitoring thereof. The apparatus is operable in two modes: a treatment mode for delivery of treatment light to an area of a patient's skin abutted to a light guide of the apparatus; and a diagnostic mode for acquiring one or more images of the abutted area of skin. Switching between the two modes may be made in a short time, facilitating monitoring during treatment. In exemplary embodiments, the apparatus sends image data to an analyzer, which analyzes images and computes an optimal treatment course, at least optimal parameters (intensity, pulse width, repetition rate) for the next delivery, and sends the optimal treatment course to the controller for implementation by the apparatus in real time.

A phototherapy device emitting light polarized in different directions is used to treat a patient. Preferably light beams polarized in three directions are applied simultaneously to a desired treatment area on the patient, namely linear polarized light, right-handed circular polarized light, and left-handed circular polarized light.

A method is provided for performing electromagnetic radiation therapy on a subject. The method comprises providing a device which emits electromagnetic radiation, wherein the electromagnetic radiation includes a first portion that oscillates between at least first and second distinct states, and a second non-oscillatory portion; and illuminating the subject with the electromagnetic radiation.