49 results about "Glan–Taylor prism" patented technology

The invention discloses a mixed gas multi-waveband atomic optical filter and a method thereof. The mixed gas multi-waveband atomic optical filter comprises a glass gas chamber with mixed alkali metal rubidium and cesium atoms, a first Glan Taylor prism and a second Glan Taylor prism which are orthometric in the direction of polarization of light, and a stable magnetic field source. The prisms are arranged at two sides of the glass gas chamber with the mixed alkali metal rubidium and cesium atoms and right face to the alkali metal atom glass gas chamber, and complete Faraday rotation effect can be achieved through the mixed rubidium and cesium atoms of the glass gas chamber with the mixed alkali metal rubidium and cesium atoms and laser; the stable magnetic field source is used for producing a gradient magnetic field with changing strength onto the glass gas chamber with the mixed alkali metal rubidium and cesium atoms, and the direction of the magnetic field of the gradient magnetic field is parallel to the direction of light propagation. The filter has the advantages that the filter is simple in structure, easy to manufacture, fine in performance, stable in operation and long in service life.

The invention relates to a rapid pulse laser polarization degree measurement device and belongs to the technical field of laser. The device comprises a laser (1), a beam shaping lens (2), a Glan-Taylor polarizer (3), a depolarizing beam splitter prism (4), a polarizing beam splitter prism (5), a photoelectric detector A (6) and a photoelectric detector B (7). According to the device, by adoption of the polarizing beam splitter prism, horizontal polarization P light and vertical polarization S light in back scattering light beams of a tested sample can be separated, a horizontal polarization P light voltage value VP and a vertical polarization S light voltage value VS in the light beams are measured, and the back scattering polarization degree of the tested sample is calculated by utilizing (VP-VS) / (VP+VS), so that the polarization degree of the tested sample is rapidly measured. In a measurement process, the error brought by the operation of respectively acquiring the horizontal polarization P light and the vertical polarization S light by regulating an analyzer is avoided, so that the measurement precision is high.

The invention provides a micro-cantilever thermal shock signal measuring apparatus. The apparatus comprises an incident optical path assembly and two detection optical path assemblies. The incident optical path assembly comprises a line polarizer, a first spectroscope, a Wollaston prism, a first convergent lens and a second spectroscope. Polarization laser forms two beams of incident ray polarized light with mutually vertical polarization directions through the line polarizer, the first spectroscope and the Wollaston prism, after convergence, is respectively vertically incident to the tip end and the substrate of a cantilever arm, after reflection respectively, forms two beams of reflection polarized light with mutually vertical polarization directions, converges through the Wollaston prism and is incident to the second spectroscope to form two beams of detection polarized light. Each detection optical path assembly comprises a photoelectric detection circuit, the two beams of detection polarized light are respectively incident to the two photoelectric detection circuits, and the photoelectric detection circuits, after converting optical signals into electric signals, obtain a phase difference of the two beams of reflection line polarized light through calculating the two electric signals.

The invention relates to an iodine molecular optical clock based on pulse modulation wide-spectrum comb-tooth-type laser and a control method. A power supply control system of the iodine molecule optical clock generates a pulse modulation signal and transmits the pulse modulation signal to a laser system to generate a pulse signal, optical feedback isolation is performed on a rear optical path through an isolator, and a first half-wave plate and a first polarization splitting prism are sequentially connected behind the isolator; a laser frequency stabilization light path comprises a second half-wave plate and a second polarization splitting prism which are connected in sequence and divide the laser for the laser frequency stabilization light path into two beams; one beam with stronger light intensity is used as a pump laser, passes through a Glan-Taylor prism, a third half-wave plate and an electro-optic phase modulator in sequence, and is reflected to a light path multiplication system by a third polarization splitting prism; and the beam with weaker light intensity is used as a detection laser to pass through the light path multiplication system and the third polarization splitting prism, is received by a high-speed photoelectric detector and then is input into a laser phase discrimination and high-speed servo feedback control circuit to generate a servo signal of the power supply control system.

Acousto-optic Tunable Filter (AOTF) parameter calibration system, which consists of control and processing computer, grating monochromator, mercury-argon gas light source, optical path part, precision electronically controlled turntable, high-precision RF driver, photoelectric It consists of multiplier tube, CCD light intensity distribution detector, and precise electronically controlled translation guide rail. The optical path part is mainly composed of reflector, half mirror, Glan Taylor prism, collimating lens, diaphragm and focusing lens. The calibration system of the invention is complete and has high calibration accuracy, and can automatically calibrate parameters such as AOTF beam incident angle, off-axis angle θa, angular aperture δ, wavelength response function, wavelength-frequency tuning relationship, deflection angle β, etc. Index inspection of AOTF products, research on AOTF spectra and imaging characteristics, and also provide technical parameters for the integration of AOTF spectrometers.

The invention discloses an all-optical switch based on a rubidium-atom optical filter and a method thereof. The all-optical switch based on the rubidium-atom optical filter comprises an alkali-metal rubidium-atom glass air chamber with a V-type energy level structure, two Glan-Taylor polarizers with the polarization directions perpendicular to each other and a stable magnetic field source used for generating a magnetic field with uniform intensity for the alkali-metal rubidium-atom glass air chamber, wherein the alkali-metal rubidium-atom glass air chamber, the two polarizers with the polarization directions perpendicular to each other and the stable magnetic field source form a standard atomic optical filter. The all-optical switch based on the rubidium-atom optical filter further comprises a 420 nm laser device serving as a control part of the all-optical switch of the atomic optical filter and a 780 nm laser device serving as a performance testing and application wavelength testing part of the all-optical switch of the rubidium-atom optical filter. The all-optical switch based on the rubidium-atom optical filter has the advantages of being clear in design principle, simple in structure, easy to manufacture, good in switching performance, stable in operation and long in service life.

The invention relates to an atomic optical rotation type band-rejection trap. The atomic optical rotation type band-rejection trap comprises a first atomic gas chamber filled with atomic gas, two Glan-Taylor prisms, a stable static magnetic field source, a second atomic gas chamber filled with atomic gas and two temperature control circuit systems, wherein the two Glan-Taylor prisms are parallel to each other in the polarization directions of two beams of light and are disposed on two sides of the first atomic gas chamber, and gas atoms in the first atomic gas chamber and laser can have sufficient Faraday optical rotation effect under the condition of an external magnetic field; the stable static magnetic field source generates an even static magnetic field for the first atomic gas chamber, and the magnetic field direction is parallel to the laser propagation direction; the second atomic gas chamber and the laser can have saturated absorption effect; the two temperature control circuit systems act on the first atomic gas chamber and the second atomic gas chamber respectively. The invention further discloses an application method of the atomic optical rotation type band-rejection trap. The atomic optical rotation type band-rejection trap and the application thereof have the advantages that narrow-band band-rejection characteristics on specific wavelengths, high transmittance beyond a rejection band and a high rejection ratio in the rejection band are obtained through controllable Faraday anomalous dispersion effect and saturated absorption effect at the atomic transition wavelength position.

The invention relates to an iodine molecular optical clock based on a pulse-modulated broad-spectrum comb-shaped laser and a control method. The power control system of the iodine molecular optical clock generates a pulse modulation signal and transmits it to the laser system to generate a pulse signal, which is isolated from the optical feedback of the rear optical path by the isolator, and the isolator is connected to the first half-wave plate and the first polarization beam splitter in turn; The frequency-stabilizing optical path is the second half-wave plate and the second polarization beam-splitting prism connected in sequence; after the second polarization beam-splitting prism, it is divided into two beams: the beam with stronger light intensity is used as the pump laser in turn through the Glan-Taylor prism, the third half-wave beam The light beam and the electro-optical phase modulator are reflected by the third polarization beam splitter to the optical path multiplication system; the beam with weaker light intensity is used as the detection laser optical path multiplication system and the third polarization beam splitter, and is input to the laser phase detector after being received by the high-speed photodetector And high-speed servo feedback control circuit to generate the servo signal of the power control system.

The invention discloses a femtosecond laser-induced breakdown spectrum generation and acquisition system based on space-time shaping, and belongs to the technical field of femtosecond laser application. A Bessel light beam with a long focal depth is used for exciting material plasmas after being shrunk; under the condition that focusing is not carried out, plasma excitation with the same energy density is achieved at different height positions of a sample, the process of single-point independent focusing is omitted, possible human and machine errors in each time of focusing operation are avoided, and the stability, repeatability and collection efficiency of spectrum collection are guaranteed. The system can adjust parameters of the conical lens and the beam shrinking lens group to obtain Bessel regions with different focusing lengths, and a device suitable for samples with different height change ranges is designed according to individual requirements. When a femtosecond laser Bessel beam is adopted to excite plasmas on the surface of a rough sample, the combination of a half-wave plate and a Glan-Taylor prism in the system realizes the continuous linear adjustment of pulse energy,and realizes the sample detection and analysis under the nearly lossless condition.

The invention discloses a high precision linear polarization radiometer and a use method thereof. The high precision linear polarization radiometer comprises a filter wheel. The filter wheel is connected with a motor. A position sensor is arranged on one side of the filter wheel. A window film, an aperture diaphragm and a Glan-Taylor prism are successively arranged from top to bottom along the incident light direction just above the filter wheel. A photoreceptor system is arranged just below the filter wheel. The photoreceptor system comprises a parabolic reflector. A field diaphragm, a focusing lens and a dual-color detector are successively arranged on the reflection light path of the parabolic reflector. The dual-color detector and the signal output end of the position sensor are connected with a control acquisition system. Compared with a traditional polarization radiometer, the high precision linear polarization radiometer provided by the invention does not require the advantage of polarization degree calibration, and can be theoretically used as the carrier of a standard linear polarization source in the form of an instrument.