Abstract: This invention discloses a phototherapy apparatus for biological tissue (preferably skin tissue) treatment. The phototherapy apparatus comprises one or more light sources and a built-in ultrasonic imaging module. The ultrasonic imaging module provides a high-resolution image of the biological tissue from its surface layer to a depth of a few centimeters. The image is utilized to optimize the phototherapy procedure in parameters such as light intensity, wavelength, spot size, divergence angle, duration, repetition rate, duty cycle, etc. and to evaluate the effectiveness of the phototherapy procedure.

Abstract: A Fourier Transform (FT) spectrometer apparatus uses multi-element MEMS (Micro-Electro-Mechanical-Systems) or D-MEMS (Diffractive Micro-Electro-Mechanical-Systems) devices. A polychromatic light source is first diffracted or refracted by a dispersive component such as a grating or prism. The dispersed beam is intersected by a multi-element MEMS apparatus. The MEMS apparatus encodes each spectral component thereof with different time varying modulation through corresponding MEMS element. The light radiation is then spectrally recombined as a single beam. The beam is further split into to a reference beam and a probe beam. The probe light is directed to a sample and then the transmitted or reflected light is collected. Both the reference beam and probe beam are detected by a photo-detector. The detected time varying signal is analyzed by Fourier transformation to resolve the spectral components of the sample under measurement.

Abstract: A light emitting panel is disclosed for medical applications including photodynamic therapy and photo bio-stimulation. The light emitting panel utilizes high intensity light emitting diodes (LEDs) as its light source and side-emitting optical fibers for light delivery.

Abstract: A spectroscopic diagnostic apparatus is disclosed as an aid for laser tattoo removal. The apparatus performs spectroscopic analysis of the tattooed skin before or during laser treatment, which provides composition information of the tattoo pigments and photometric information of the skin for optimizing laser treatment protocols automatically or manually. It also provides a simulated treatment result for the selected laser types.

Abstract: An apparatus for measuring properties of physical matters by means of Raman spectroscopy including a laser element, a wavelength dispersion element, an array or single element detector, and a control and data processing unit. The laser element, which is used to excite Raman scattering, is spectrum narrowed and stabilized by attachment of a Bragg grating device. The grating can be either a volume Bragg grating (VBG) written inside a glass substrate or a fiber Bragg grating (FBG) written inside an optical fiber. A laser element can be provided with a wavelength modulation capability for fluorescence background suppression.

Abstract: In a laser based curing apparatus, the acts both as the curing light and the excitation source for a Raman spectroscopic sensor. The spectroscopic sensor provides real-time, in situ, non-invasive curing status monitoring via Raman spectroscopy. The spectroscopic information can be further used to control the operation parameters of the laser to achieve the optimum cure result.

Abstract: A Raman spectroscopic apparatus utilizing a broad stripe semiconductor laser as the excitation light source is provided. The output spectrum of the semiconductor laser is narrowed and stabilized by an internal grating to provide high spectral brightness. A high throughput optical system is also disclosed for Raman scattering signal excitation and extraction, which takes full advantage of the high spectral brightness of the laser source.

Abstract: A temperature insensitive diode-pumped solid state laser is disclosed in this invention. The components of the laser are optimized with temperature insensitive design, making the laser capable of operating in a wide temperature range without using any cooling/heating system to maintain the temperature of its components.

Abstract: A fluorescence subtracted Raman spectroscopy apparatus uses a wavelength modulated tunable filter as the spectrometer. The wavelength modulation results in an amplitude modulation on the detected optical signal. By using a frequency selective detection technique, the Raman signal is amplified and extracted from the fluorescence background.