摘要:
The present invention provides an all optical cross connect switch utilizing two-axis MEMS mirrors for cross connecting optical fibers in a first set of optical fibers to optical fibers in a second set of optical fibers. The optical fibers in the first and second sets of optical fibers are precisely positioned in a first fiber-microlens positioning array to define a first set of parallel collimated cross-connect communication beam paths, with each collimated cross-connect communication beam path connecting an optical fiber in the first set of optical fibers with a MEMS mirror in a first MEMS mirror array. Alignment beams are added to and aligned co-axially with each of the first and second sets of parallel collimated cross-connect communication beams. Two beam direction sensor units are positioned to detect each alignment beam in the first and second sets of alignment beams transmitted through the dichroic mirror and a MEMS control system controls the positions of the MEMS mirrors to connect optical fibers in the first set of optical fibers to any of the optical fibers in the second set of optical fibers.
摘要:
The present invention provides an all optical cross connect switch utilizing two-axis MEMS mirrors for cross connecting optical fibers in a first set of optical fibers to optical fibers in a second set of optical fibers. The optical fibers in the first and second sets of optical fibers are precisely positioned in a first fiber-microlens positioning array to define a first set of parallel collimated cross-connect communication beam paths, with each collimated cross-connect communication beam path connecting an optical fiber in the first set of optical fibers with a MEMS mirror in a first MEMS mirror array. Alignment beams are added to and aligned co-axially with each of the first and second sets of parallel collimated cross-connect communication beams. Two beam direction sensor units are positioned to detect each alignment beam in the first and second sets of alignment beams transmitted through the dichroic mirror and a MEMS control system controls the positions of the MEMS mirrors to connect optical fibers in the first set of optical fibers to any of the optical fibers in the second set of optical fibers.
摘要:
This invention concerns with a semiconductor device which is characterized in that the device is provided with a thin film transistor 40 having a polycrystalline semiconductor layer 11, the semiconductor layer 11 including a channel area 22, highly doped drain areas 24, 17 positioned on both sides of the channel area 22 and LDD areas 18a, 18b positioned between the channel area 22 and the highly doped drain areas 24, 17 and lower in dopant density than the highly doped drain areas 24, 17, wherein any diameter of the crystal 14 at least partly existing in the LDD area 18b is larger than the size of other crystals 15.
摘要:
In a polycrystalline silicon thin film transistor, a semiconductor device having a high field effect mobility is achieved by increasing a grain size of a silicon thin film. First, an insulation layer having a two-layer structure is formed on a transparent insulated substrate 201. In the insulation layer, a lower insulation layer 202, which is in contact with the transparent insulating substrate 201, is made to have a higher thermal conductivity than an upper insulation layer 203. Thereafter, the upper insulation layer 203is patterned so that a plurality of stripes are formed thereon. Subsequently, an amorphous silicon thin film 204 is formed on the patterned insulation layer, and the insulation layer is irradiated with a laser light scanning in a direction parallel to the stripe pattern on the upper insulation layer 203. Thus, the amorphous silicon thin film 203 is formed into a polycrystalline silicon thin film 210.
摘要:
In a polycrystalline silicon thin film transistor, a semiconductor device having a high field effect mobility is achieved by increasing a grain size of a silicon thin film. First, an insulation layer having a two-layer structure is formed on a transparent insulated substrate 201. In the insulation layer, a lower insulation layer 202, which is in contact with the transparent insulating substrate 201, is made to have a higher thermal conductivity than an upper insulation layer 203. Thereafter, the upper insulation layer 203 is patterned so that a plurality of stripes are formed thereon. Subsequently, an amorphous silicon thin film 204 is formed on the patterned insulation layer, and the insulation layer is irradiated with a laser light scanning in a direction parallel to the stripe pattern on the upper insulation layer 203. Thus, the amorphous silicon thin film 203 is formed into a polycrystalline silicon thin film 210.
摘要:
An optical display apparatus is provided that can utilize a low intensity point light source and that requires a small physical profile. The optical display apparatus comprises an image display apparatus including at least one point light source to form an image to be displayed for viewing, a hologram screen that defracts and reflects light from the point light source, and an imaging optical system arranged to adjust a focus in one direction of the image so that the point light source of the optical display apparatus is focused to a line on the hologram screen. The optical display apparatus reconstructs and images the image displayed on the image display apparatus on a virtual display plane.
摘要:
A card-shaped waveguide-type image transmission device has an image transmission base member piled up on a light illumination base member, and an optical system such as grating patterns and diffraction lens pattern for diffracting and focusing light beams are formed on the surfaces of the image transmission base member and the light illumination base member. The card-shaped waveguide-type image transmission device is integrated with an ID card, an IC card, an optical card or a ROM card as a fingerprint identification device.
摘要:
This invention provides an optical head apparatus in which a grating coupler (8), which is formed on a circular region which has a center on an axis (18) and has a periodical structure with dents and projections in a configuration of concentric circles or spirals around the axis (18), input-couples laser light (7) emitted from a semiconductor laser (5) and turns it into waveguided light (16B) which transmits in a waveguiding layer (15B). The waveguided light (16B) is converted, in a region where the waveguiding layer (15B) and a waveguiding layer (15A) overlap each other, to waveguided light (16A) which transmits in the waveguiding layer (15A). By a grating coupler (9), formed on a ring-shaped area which is located around the axis (18), which has a periodic structure with dents and projections of a configuration of concentric circles or spirals around the axis (18), the waveguided light (16A) is radiated and focused onto points (FA), (FB) and (FC) which are located on the axis (18). Light reflected from a reflecting surface (19) is input-coupled by the grating coupler (9) and is converted to waveguided light (21) which transmits through the waveguiding layer (15A) toward the center. The waveguided light (21) is radiated at the innermost edge of the waveguiding layer (15A) and the amount of radiated light is detected by a light detector (10) to obtained control signal and playback signals.
摘要:
A method and system for creating and co-aligning a first array of optical beams with a second array of optical beams. In a preferred application the invention is used in a cross connect optical switch. A first set of alignment beams are created and added to and aligned co-axially with each of the first set of parallel collimated cross-connect communication beams. A second set of alignment beams are created and added to and aligned co-axially with each of the second set of parallel collimated cross-connect communication beams. A preferred embodiment includes an injection unit with a “point” infrared light source such as a vertical cavity surface emitting laser (VCSEL) operating in the near infrared at 850 nm and having a divergence of about 30 degrees. The beam from this source is collimated with collimator optics to produce a collimated beam with a cross sectional dimension of about 16 millimeter×16 millimeters. This collimated beam is separated into 128 separate beams with a mask having 128 0.6 mm diameter apertures that are positioned to align the 128 separate parallel beams with the communication beams from a fiber bundle.
摘要:
An optical fiber alignment unit for the easy precise alignment of optical fibers in and array. In a preferred embodiment the positioning array is incorporated twice in an all optical cross connect switch utilizing MEMS mirrors for cross connecting optical fibers in a first set of optical fibers to optical fibers in a second set of optical fibers. The optical fibers are preferably arranged in rectangular arrays. These arrays include array sizes such as 4×8, 16×16 and 8×16. A preferred embodiment built and tested by Applicants is a modular optical switch in which an input 8×16 array of optical fibers from sixteen eight-fiber ribbons are cross-connected into an output 8×16 array of optical fibers also from sixteen eight-fiber ribbons.