摘要:
Apparatus and method for optical spectroscopy and/or imaging with a variable fiber offset. An optical probe includes one or more first optical fibers, one or more second optical fibers, and one or more actuators. The first optical fibers are to deliver light to an object. The second optical fibers are to collect light emitted from the object. The actuators are configured to change a distance between the first optical fibers and the second optical fiber while the object is being illuminated by light emitted from the first optical fibers.
摘要:
A piezoelectric element includes a substrate having a first surface with a predetermined orientation; a lower electrode layered on the first surface of the substrate; a piezoelectric thin film layered on the lower electrode and having a piezoelectric body; and an upper electrode layered on the piezoelectric thin film. A voltage is to be impressed between the lower electrode and the upper electrode to deform the piezoelectric thin film. The piezoelectric thin film is epitaxially grown on the lower electrode using a physical vapor deposition or a chemical vapor deposition.
摘要:
The present invention relates to a method and system for fiber positioning in wide-field astronomy. In one form the method and system of the present invention relate to anchoring fiber end points adjacent or against the field plate of a telescope. In one embodiment the positioning system for anchoring a fiber end point at a location on a telescope field plate collocated with a telescope focal plane, the positioning system comprising a piezoelectric positioning device for positioning the fiber end point, the positioning device comprising a chamber having an opening, the opening lying against the field plate in use defining a substantially enclosed volume inside the chamber, a pump for reducing pressure inside the enclosed volume; and a path connecting the pump and the enclosed volume so that, in use, the pump effects a reduction in pressure in the chamber thereby anchoring the fiber end point on the field plate.
摘要:
A piezoelectric actuator capable of being driven with a high electric field intensity, obtaining a larger displacement and being high in electric conducting reliability of electrodes, and comprising: at least one cell defined by two side walls, a substrate and a ceiling wall; the two side walls being disposed on the substrate and being covered with the ceiling wall to define one cell, at least the two side walls comprising piezoelectric/electrostrictive devices, and the piezoelectric/electrostrictive devices being capable of changing a volume of the cell by displacement of the walls. Each of the piezoelectric/electrostrictive devices comprises a plurality of layered piezoelectric/electrostrictive bodies and electrodes which are alternately stacked, and end portions of the electrodes are embedded in the piezoelectric/electrostrictive bodies in at least the internal side of the cell.
摘要:
An optical switch includes at least one input port for receiving a plurality of channel wavelengths of an optical signal and a plurality of output ports. A plurality of wavelength selective elements are also provided, which each select a channel wavelength from among the plurality of channel wavelengths received at the input port. A plurality of optical elements are respectively associated with the plurality of wavelength selective elements. Each of the optical elements direct one of the selected channel wavelengths, which are selected by the associated wavelength selective element, to any one of the output ports independently of all other channel wavelengths and with a selectively variable degree of attenuation. The switch also includes a controller for adjusting a configuration of the optical elements to provide the channel wavelengths with the selectively variable degree of attenuation.
摘要:
MEMS can be fabricated from fibers without the use of a matrix material. Devices can be built where fibers are attached only at a substrate edge (e.g. cantilevers, bridges). Motions can be controlled by adjusting the linkage between multiple fibers with weak coupling (e.g. base, tip, in-between). Driving mechanisms include base-forcing (magnetics, piezo, electrostatics) or tip forcing (magnetics). Mirrors may be formed on free ends of cantilevers to form optical scanners.
摘要:
In a WDM optical communication system that includes a plurality of nodes interconnected by communication links, a node is provided that includes a reconfigurable optical switch having a plurality of input ports and at least one output port. The node also includes a plurality of transmitters that are each coupled to one of the input ports of the optical switch. Each of the transmitters generate an information-bearing optical signal at a different channel wavelength from one another. The reconfigurable optical switch is adaptable to receive at any of the input ports any of the channel wavelengths at which the plurality of transmitters operate and direct the channel wavelengths to the output port. At least one backup transmitter is coupled to one of the input ports of the optical switch. The backup transmitter includes a tunable laser tunable to any of the channel wavelengths at which the plurality of transmitters operate. The reconfigurable optical switch includes at least one wavelength selective element that selects at least one channel wavelength from among any of the channel wavelengths received at any of the input ports. The switch also includes a plurality of optical elements associated with the wavelength selective elements, Each of the optical elements direct one of the selected channel wavelengths selected by the associated wavelength selective element to the output port independently from every other channel wavelength. The selected channel wavelengths directed to the output port are combined on the output port.
摘要:
An arrangement includes a photonic band-gap assembly comprising at least one input wave guide and at least one output wave guides, and at least one routing element responsive to signals to selectively route a signal from the input wave guide to one or more of the output wave guides.
摘要:
An all-optical, optical cross-connect includes first and second pluralities of multiport optical devices. Each of the first plurality of multiport optical devices have at least one input port for receiving a WDM optical signal and a plurality of output ports for selectively receiving one of more wavelength components of the optical signal. Each of the second plurality of multiport optical devices have a plurality of input ports for selectively receiving one of more wavelength components of the optical signal and at least one output port for selectively receiving one of more wavelength components of the optical signal. At least one of the first or second plurality of multiport optical devices are all-optical switches that can route every wavelength component independently of every other wavelength component. The plurality of input ports of the second plurality of multiport optical devices are optically coupled to respective ones of the plurality of output ports of the first plurality of multiport optical devices.
摘要:
A LIGHT TRIGGERED BENDING ELEMENT LIGHT SWITCH will be used to turn on or off the light signal in one of two adjacent fiber optic channels by the action of the electric field of the light passing through the channels. LIGHT TRIGGERED BENDING ELEMENT LIGHT SWITCH can be made adjacent to each other so that the bending Elements will latch together and stay in the state required by means of the shape of the ends of the Elements. The bending is accomplished by the response of piezoelectric material to the electric field of light in the fiber optic channel. This will allow information of be stored by the LIGHT TRIGGERED BENDING ELEMENT LIGHT SWITCH that are made to latch. Light of different frequencies may travel in a light channel of appropriate dimensions together without hindering each other. The light that actuates the light switching or latching may be a different frequency than the light signal that is switched on or off. This switch holds the latched position required until light signals of the appropriate wavelength and power in the proper sequence are applied to the LIGHT TRIGGERED BENDING ELEMENT LIGHT SWITCH to cause the unlatching.