5 results about "Glan–Taylor prism" patented technology

The invention relates to the technical field of atomic frequency standards, in particular to a rubidium cold atom gas chamber-based two-photon transition optical frequency standard device, which comprises a two-photon transition clock laser system, a rubidium cold atom gas chamber, a cooling laser system, a sputtering ion pump and a rubidium source, wherein the two-photon transition clock laser system comprises a laser generation modulation light path, a laser power stabilization light path and a laser frequency control light path; the rubidium cold atom gas chamber is arranged behind the Glan-Taylor prism; the cooling laser system comprises a cooling laser, a second isolator, a second polarization beam splitter, a pumping light path, a re-pumping light path and a detection light path; the sputtering ion pump is connected with the rubidium cold atom gas chamber; and the rubidium source is connected with the rubidium cold atom gas chamber. The two lasers are utilized to obtain the two-photon transition signal, so that the rubidium atom two-photon transition light frequency standard with high stability is obtained, and the intensity of the two-photon transition fluorescence signal is improved.

This application relates to the field of optical polarization measurement technology, specifically to a wide-spectrum, high-bandwidth static spectral modulation Stokes polarization measurement device, comprising a polarization modulation module, a spectral sampling module, and a high extinction ratio polarizer. The polarization modulation module includes a phase retarder and a linear polarizer; the spectral sampling module has sub-nanometer spectral resolution; the high extinction ratio polarizer includes a halogen tungsten lamp and a Glan Taylor prism for generating high-purity linearly polarized light; the obtained demodulation factor and the modulation spectrum acquired by the spectral sampling module are used to invert the Stokes parameters using zero-heterodyne coherent demodulation technology. This application employs a phase retarder with high birefringence, which, for the same thickness, produces an optical path difference tens of times greater than that of quartz, increasing the Stokes polarization measurement bandwidth by a factor of the response and improving the measurement accuracy of polarization spectral parameters. Simultaneously, the zero-heterodyne coherent demodulation method is used to eliminate the dispersion interference of the phase retarder through calibration.

The application provides a preparation method of a flat femtosecond laser oversaturated doping device, a method and a detector, and belongs to the technical field of photoelectricity, comprising a femtosecond laser, an electro-optic shutter, a second half-wave plate, a second Gartai Taylor prism, a focusing lens and a closed processing cavity arranged in sequence, sulfur film is plated on the surface of silicon as a dopant by using a thermal evaporation method, and the number of processing pulses is accurately controlled by using the electro-optic shutter, so that arbitrary pulse number processing is realized, and uncontrollable random influences caused by surface energy localization and hatching effect are inhibited. The surface of the flat oversaturated doping silicon material prepared by the application is compatible with modern semiconductor industrial technology, is beneficial to the development of silicon-based series photoelectric devices and promotes the development of CCD and CMOS focus plane devices. In addition, the light responsivity of the flat oversaturated doping silicon detector prepared by the application exceeds 1A / W in the 350-1200nm wave band, and ultraviolet enhancement and sub-bandgap infrared detection are simultaneously realized.

This invention relates to a method and apparatus for testing the polarization deflection angle of a semiconductor laser, belonging to the field of semiconductor laser performance testing technology. It solves the technical problems of low efficiency and cumbersome calculations in testing the polarization deflection angle of semiconductor lasers. The testing method includes the following steps: installing and starting the semiconductor laser; testing the power of the light emitted after passing through the Glan-Taylor prism PBS and the power of the light emitted without passing through the Glan-Taylor prism PBS; adjusting the fixture to a fixed angle and testing the power of the light emitted through and without passing through the Glan-Taylor prism PBS; and calculating the polarization deflection angle of the semiconductor laser based on the power of the emitted light at different angles. The testing apparatus includes a fixture, a convex lens, a Glan-Taylor prism PBS, and an optical power meter. The laser sequentially enters the convex lens and the Glan-Taylor prism PBS, and the optical power meter is used to test the power of the light emitted after and without passing through the Glan-Taylor prism PBS.

The application discloses a lung cancer rapid detection system based on femtosecond laser and Raman spectrum analysis, and relates to the technical field of spectrum diagnosis equipment, and comprises a substrate manufacturing module, a sample loading module and a detection module, wherein the substrate manufacturing module comprises a femtosecond laser, a half-wave plate, a Gartaieller prism, a filter, a shutter, a light source, a monitor, a lens, a beam splitter, a dichroic mirror, a microscope objective and a metal substrate, and is used for manufacturing nano microstructures on the metal substrate under the femtosecond laser. The metal substrate of the application constructs the super-hydrophobic micro-nano structure on the metal surface by the femtosecond laser in one step, has the abilities of SERS enhancement and instant body fluid molecule enrichment, realizes detection integration, is non-invasive in the whole process, has high sensitivity, high specificity, low cost, can be portable into bedside or intraoperative, and provides an in-situ, non-invasive, low-cost and second-level discrimination new tool for early screening, curative effect monitoring and incisal edge evaluation of high-risk groups.