摘要:
An optical coupling device comprises an optical fiber block including a first block part and a second block part contacting with one side of the first block part, an optical fiber penetrating the optical fiber block and having an end surface exposed at a bottom surface of the optical fiber block, a semiconductor chip disposed below the optical fiber block and having an optical input/output element disposed on a top surface of the semiconductor chip to correspond with the end surface of the optical fiber, and a planarization layer disposed on the top surface of the semiconductor chip and having a recess region. A bottom surface of the first block part has a higher level than that of the second block part. The bottom surface of the second block part contacts with a bottom of the recess region. The optical fiber is optically coupled with the optical input/output element.
摘要:
A wavelength division multiplexer is disclosed. The wavelength division multiplexer may include an input waveguide, in which a plurality of Bragg gratings for separating multiplexed optical signals into respective optical signals are provided, and a plurality of output waveguides connected to the input waveguide and configured to receive the optical signals separated by the plurality of Bragg gratings. The plurality of Bragg gratings may include a first Bragg grating including first protrusions each having a first width, and a second Bragg grating including second protrusions each having a second width larger than the first width. Each of the first and second protrusions may include a curved side surface, to which a corresponding one of the optical signals is incident.
摘要:
Provided is an optical coupler including a substrate, a buffer layer on the substrate, a ridge waveguide having a first side surface and a second side surface opposed to the first side surface, and a first waveguide disposed adjacent to the second side surface. The first waveguide includes a first body part and a first connecting part extending from one end of the first body part to be inserted in the ridge waveguide. The first connecting part has a width decreasing in the direction away from the second side surface, and the ridge waveguide includes an extension part extending under an upper surface of the buffer layer.
摘要:
Provided is a wavelength division device. The wavelength division device includes input arrayed waveguides, an input circular grating coupler connected to one ends of the input arrayed waveguides and configured to refract first light having a plurality of wavelengths and output the refracted first light to each of the one ends of the input arrayed waveguides as plurality of second light, and an output star coupler connected to the other ends of the input arrayed waveguides and configured to receive the plurality of second light from the other ends of the input arrayed waveguides and output optical signals that are divided for each wavelength. The input circular grating coupler includes a plurality of circular gratings.
摘要:
Disclosed are a disease diagnosis device and a diagnosis method thereof. The disease diagnosis device includes a pump for pumping a respiratory gas, a first pre-treatment portion connected to the pump and removing moisture and bad breath in the respiratory gas, and a volatile organic compound (VOC) detection portion connected between the first pre-treatment portion and the pump to detect VOCs in the respiratory gas.
摘要:
A semiconductor device includes a semiconductor structure including a substrate, a first semiconductor layer on the substrate, and a second semiconductor layer on the first semiconductor layer, a first passivation pattern provided on the semiconductor structure, and first and second conductive patterns provided on the semiconductor structure and spaced from the first passivation pattern.
摘要:
Provided is an optical switch including a substrate, a first optical waveguide disposed on the substrate and having a conductive portion disposed on one surface thereof, and a second optical waveguide disposed on the substrate being spaced apart from the first optical waveguide and having an electrode portion disposed on one surface thereof. The electrode portion and the conductive portion face each other. The electrode portion controls an optical field between the first optical waveguide and the second optical waveguide.
摘要:
Provided is a thermo-optic optical switch including an input waveguide configured to receive an optical signal, an output waveguide configured to output the optical signal, branch waveguides branching from the input waveguide to be connected to the output waveguide, and heater electrodes disposed on the branch waveguides and configured to heat the branch waveguides, wherein the branch waveguides includes first and second phase shifters having first and second thermo-optic coefficients of opposite signs.
摘要:
Provided are a semiconductor device and a method for manufacturing the same. The semiconductor device according to an embodiment of the inventive concept includes a first semiconductor chip having a recess portion in one surface thereof; a first adhesion pattern filled within the recess portion of the first semiconductor chip; and a second semiconductor chip disposed on the first adhesion pattern. The second semiconductor chip may represent improved heat dissipation characteristics.
摘要:
Provided is a wavelength combiner including a slab waveguide; an output waveguide extended from the slab waveguide in a first direction; and at least one rib waveguide disposed at an interval horizontally from the output waveguide and extended from the slab waveguide in the first direction, wherein the rib waveguide is tapered in the first direction.