Patent application number | Description | Published |
20080247708 | Optical waveguide device - The present invention has an object to provide an optical device capable of leading out a light propagated through an optical waveguide to a desired substrate side face while maintaining the sufficient power of the light, within a range of limited substrate size. To this end, according to the optical device of the present invention, a groove is formed in the vicinity of an end portion on the optical output side of the optical waveguide, on the substrate on which the optical waveguide is formed, a side wall of the groove is used as a reflecting plane, the light output from the optical waveguide is reflected by the reflecting plane, and the reflected light is emitted from the desired substrate side face. | 10-09-2008 |
20080317424 | Optical module and optical switching device - The invention relates to an optical device which can increase the spread of a beam diameter in the depthwise direction by a simple configuration in comparison with that by prior art devices. The optical device includes a substrate, an optical path formed on the substrate, and a diffraction propagation region, provided between the optical path and an end face of the substrate, for propagating light emitted from the optical path with diffraction. The diffraction propagation region includes a first groove, formed therein, adapted to block part of components of the propagated light in a depthwise direction of the substrate. | 12-25-2008 |
20090003756 | OPTICAL DEVICE - An optical device including (a) a substrate having an electro-optic effect; (b) a modulating optical waveguide formed on a surface layer portion of said substrate and forming an interference optical modulator for modulating input light; (c) an output optical waveguide formed on said surface layer portion of said substrate and connected to a downstream side portion of said modulating optical waveguide; and (d) a branching monitoring section for monitoring branched light of light propagated along said output optical waveguide and emitted from an outgoing end face of said substrate. The output waveguide has a reduced width region in which the waveguide width is reduced. | 01-01-2009 |
20090162014 | OPTICAL WAVEGUIDE DEVICE AND OPTICAL APPARATUS USING OPTICAL WAVEGUIDE DEVICE - According to an aspect of an embodiment, an optical waveguide; and a branching section which branches a part of a light propagating through the optical waveguide, wherein the branching section has a first coupler which branches the light propagating through the optical waveguide according to a given unequal branching ratio so as to output first and second branched lights, and uses the first branched light as a first output light; and a second coupler which inputs the second branched light output from the first coupler and branches the second branched light into two lights according to a branching ratio which is substantially equal to the branching ratio in the first coupler so as to output third and fourth branched lights, and uses the fourth branched light as a second output light. | 06-25-2009 |
20090190876 | Waveguide polarizer and optical waveguide device - In the waveguide polarizer, an optical waveguide formed on a substrate includes a curved portion and there is provided an optical absorbing portion positioned on the outside in radial direction of the curved portion, and one of orthogonal polarization components of a light propagated through the optical waveguide ran out from the curved portion to the outside in radial direction is propagated through the optical absorbing portion to thereby be led to the outside of the optical waveguide, so that only the other polarization component is propagated to be output. Thus, it becomes possible to realize a miniaturized waveguide polarizer of low wavelength dependence. | 07-30-2009 |
20100014801 | Multilevel light intensity modulator - In a multilevel light intensity modulator of the invention, input light is branched into n (n is an integer of 2 or more), and respectively sent to n branching waveguides. On the branching waveguides are respectively provided MZI light modulating sections. The MZI light modulating sections branch the input light into two at a branching ratio different from 0.5:0.5, and respectively output a binary optical signal with a quenching ratio being deteriorated, by on/off driving with a binary electric signal. Then by coupling the light output from the MZI light modulating sections, an optical signal with the light intensity modulated to a 2 | 01-21-2010 |
20100142879 | Polarization conversion device and polarization multiplexing modulator - A polarization conversion device converts a polarization state of a light which is input to a first waveguide, that is, TE/TM mode of the light, to output it from the first waveguide. The polarization conversion device includes: a mode converter that performs the inter-conversion of TE/TM modes of the light which is input to the first waveguide; and a polarization separator that receives the light passed through the mode converter and separates the received light into a first light, TE/TM of which mode has been converted by the mode converter and a second light, TE/TM of which mode has not been converted, to output the first light to the first waveguide. | 06-10-2010 |
20100178064 | OPTICAL DEVICE AND OPTICAL TRANSMITTER - An optical device and an optical transmitter are provided. The optical device includes a substrate, a first optical waveguide that may be formed in the substrate and may have a bending portion, and a second optical waveguide that intersects with the bending portion of the first optical waveguide, wherein a groove may be formed outside the bending portion of the first optical waveguide in the substrate. | 07-15-2010 |
20130010345 | POLARIZATION MULTIPLEXING MODULATOR - A polarization conversion device converts a polarization state of a light which is input to a first waveguide, that is, TE/TM mode of the light, to output it from the first waveguide. The polarization conversion device includes: a mode converter that performs the inter-conversion of TE/TM modes of the light which is input to the first waveguide; and a polarization separator that receives the light passed through the mode converter and separates the received light into a first light, TE/TM of which mode has been converted by the mode converter and a second light, TE/TM of which mode has not been converted, to output the first light to the first waveguide. | 01-10-2013 |