摘要:
A system for time of flight measurements and a method of using same are provided. The system includes an electromagnetic power source for outputting a coherent focused beam having frequency modulation. The system further includes an optical assembly including an optical transmitting element adapted to split the coherent focused beam into a signal beam and a reference beam and an optical receiver adapted to combine the reference beam with a beam reflected from an object irradiated by the signal beam, into a combined optical beam. The system further includes an antenna for converting the combined beam into an electrical current and a processor for deriving time of flight information from the electrical current.
摘要:
본 발명에 따른 레이저 장치는 나노-세컨드(nano-second)의 펄스폭을 갖는 펌핑 레이저를 방출하는 펌핑 레이저 공급부 및 상기 펌핑 레이저 공급부의 일측에 배치되며, 상기 펌핑 레이저에 의해 펌핑되어, 상기 펌핑 레이저의 펄스폭과 상응하는 나노-세컨드의 펄스폭을 갖는 출력 레이저를 발생시키는 레이저 출력부를 포함할 수 있다.
摘要:
Die Erfindung betrifft einen Laser (10), der zumindest umfasst - einen optischen Resonator (19) mit einer transparenten Resonatorschicht (6), die sich zwischen mindestens zwei Spiegeln (3, 11) befindet und die zur Erzeugung mindestens eines sich bei einer definierten Resonatorlänge / ausbildenden resonanten Wellenlängenbandes Δλ aus einem durch den Aufbau des Resonators (19) bestimmten Wellenlängenbereich dient, - ein laseraktives Material (18) zur Erzeugung des Wellenlängenbandes aus dem Wellenlängenspektrum, wobei sich das laseraktive Material (18) zumindest in einem Teil der Resonatorschicht (6) befindet, - eine Pumpquelle zur Anregung des laseraktiven Materials (18), wobei das emittierte Wellenlängenband des Lasers (10) bei einer bestimmten Pumpleistung aus einer Überlagerung des Wellenlängenspektrums des laseraktiven Materials (18) und den resonanten Moden des Resonators (19) entsteht. Dabei gehört der Resonator (19) zu einem Dünnschichtaktuator (14) und der Dünnschichtaktuator (14) als Schichtstapel bildet gemeinsam mit dem Resonator (19) einen optischen Interferenzfilter (27) aus, wobei der Dünnschichtaktuator (14) eine Aktuatorschicht (13) zwischen zwei an eine Spannungssteuereinheit (21) angeschlossenen, voneinander beabstandeten und mit der Aktuatorschicht (13) in Verbindung stehenden Elektroden (2, 5) aufweist, wobei die Aktuatorschicht (13) zumindest einen Teil (4) der Resonatorschicht (6) bildet, die zumindest zum Teil aus elastischem, die Resonatorlänge / unter Spannung veränderndem Material besteht und wobei das elastische Material reversibel formveränderbar und ein dielektrischer Elastomer ist.
摘要:
A variable optical device for controlling properties of reflected light is described. The device includes a light reflecting surface, a layer of dynamically controllable material and an excitation source for generating an excitation field acting on the layer of dynamically controllable material. An electrical drive signal applied to the excitation source causes a change of optical properties in the layer of dynamically controllable material to provide a spatially varying change in light reflection having at least one of a desired phase curvature and a desired amplitude modulation profile.
摘要:
Methods and systems are provided for monitoring at least one gas in a sample gas. An exemplary system includes a source (102) used for generating a beam of radiation, at least one retro-reflector (104) configured to receive the beam of radiation from the source in an incident direction and reflect the beam of radiation toward the source in alignment with the incident direction, and a motor (106) configured to move the at least one retro-reflector with respect to the source in a direction collinear with the incident direction. The system also includes a sample cell (216) storing a sample gas comprising at least one gas. The sample cell is configured to allow at least a portion of an extracted beam of radiation (222) from a cavity (100), defined by the source and the at least one retro-reflector, to propagate therethrough.
摘要:
According to the present invention, a monolithically integrated laser (102), also referred to herein as a U-laser (102), or integrated dual optical emission laser (102), having a first optical emission (104) and a second optical emission (106) where both the first and second optical emissions (104), (106) of the monolithically integrated laser (102) are in optical communication with a modulator (108) or other device is provided. The integrated dual emission laser (102) can be formed with a a light bending portion (134) in variety of configurations including a waveguide in the form of a U-shape, or total internal reflection (TIR) mirrors, curved waveguides, and free-space etched gap mirrors. The integrated dual optical emission laser (102) can also have two laser gain sections (130), (148), one on each arm of the laser (102) to control gain.
摘要:
Methods and optical detection systems (200, 300, 800, 900) for generating and processing a real-time time-domain cavity ringdown spectroscopy (CRDS) signal (831, 931) from an absorbing species in an optical detection system (200, 300, 800, 900) having an optical ringdown cavity (200, 300) are disclosed. The optical ringdown cavity (200, 300) is adapted for accepting a sample of an absorbing species. One or more modulated light signals (241,243,245,341) are generated using one or more light sources (240, 242, 244, 340). The light source(s) (240, 242, 244, 340) is pulsed at a specified pulse rate(s). The modulated light signal(s) (241,243,245, 341) is resonated using the optical ringdown cavity (200, 300) comprising a plurality of mirrors(220, 230), or sets of mirrors (320, 330), to produce the CRDS signal (831, 931). The reflectivity of the mirrors (220, 230), or sets of mirrors (320, 330), is dependent upon the pulse rate of the modulated light signals (241,243,245,341). Different beamlines (212, 214, 216, 312, 314, 316) are established by the modulated light signal(s) (241,243,245, 341) and the mirrors (220, 230, 320, 330) interacting with the absorbing species sample.
摘要:
A system and method that can be employed to lock and scan the output of a laser cavity (2) is described. The system and method involves the use of a signal generator for generating an error signal between an output of the laser cavity (28) and the transmission (28) of the laser through a tunable external reference cavity (3). A dual piezo-actuated mirror (6b) permits processing of the error signal (26) with separate signal processing circuits (29a, 29b) used to provide an electrical feedback signal to the two piezoelectric crystals (22, 23b). When incorporated within a laser cavity the described system and methodology can be used to lock and scan the output of the laser cavity while providing the laser output with a reduced linewidth.