Patent application number | Description | Published |
20080226223 | METHOD OF MANUFACTURING A SEMICONDUCTOR DEVICE - A semiconductor device has a two-dimensional slab photonic crystal structure in which a substrate supports a sheet-like slab layer including, sequentially stacked, a lower cladding layer, an active layer, and an upper cladding layer. A periodic refractive index profile structure, in surfaces of the stacked layers, introduces a linear defect region that serves as a waveguide. A p-type region and an n-type region in the slab layer define a pn junction surface at a predetermined angle with respect to the surfaces of the stacked layers in the slab layer. | 09-18-2008 |
20090003397 | OPTICAL DEVICE, AND SEMICONDUCTOR LASER OSCILLATOR - In an optical device, a slab layer includes an active layer sandwiched between cladding layers. The slab layer has a periodic refractive index profile structure in a two-dimensional plane, as a two-dimensional slab photonic crystal structure, and a linear defect region serving as a waveguide in the periodic refractive index profile structure. Regions having different widths of the waveguides, as segments of the waveguide, are connected in series. | 01-01-2009 |
20100149616 | OPTICAL MODULATION DEVICE - A semiconductor optical modulation device includes a semiconductor optical modulator, wires, an output side line, an input side line and a resistor. The semiconductor optical modulator is an electroabsorption optical modulator. One of the wires is connected between an electrode of the semiconductor optical modulator and the input side line. The other of the wires is connected between the electrode of the semiconductor optical modulator and the output side line. The resistor is connected in series with the output side line. Impedance of the output side line and impedance of the resistor are different from each other. | 06-17-2010 |
20100290128 | OPTICAL MODULE - A plurality of prisms each has side surfaces that forms an angle of | 11-18-2010 |
20120008963 | OPTICAL MODULATOR, OPTICAL TRANSMISSION DEVICE, AND BIAS ADJUSTING METHOD - Included are a first modulator, a second modulator, a first optical amplifier that amplifies an output of the first modulator at an amplification factor based on a first bias signal, a second optical amplifier that amplifies an output of the second modulator at an amplification factor based on a second bias signal, an optical phase adjuster that phase-rotates an output of the second optical amplifier, an optical multiplexer that multiplexes an output of the first optical amplifier with an output of the optical phase adjuster, and a second bias corrector that generates a first pulse signal and a second pulse signal, which are complementary to each other, and obtains a first bias value and a second bias value based on a change of strength of an output signal of the optical multiplexer. The first and second pulse signals are superimposed on the first and second bias signals, respectively. | 01-12-2012 |
20120147361 | WAVELENGTH MONITOR - In a wavelength monitor that monitors a wavelength of laser light emitted from at least two semiconductor lasers formed in parallel on a semiconductor substrate, the wavelength monitor includes a collimating lens that collimates laser light from each of the semiconductor lasers, an etalon that is arranged so that laser light collimated by the collimating lens is capable of entering and has a periodicity, and a photodetector that receives laser light transmitted through the etalon and detects a light intensity, wherein a beam propagation angle in the etalon of laser light emitted from each of the semiconductor lasers becomes a predetermined angle obtained by formula 1. | 06-14-2012 |
20120262900 | OPTICAL MODULE - An optical module includes a casing, a first light output unit that is fixed to the casing and generates a first light signal, a second light output unit that is fixed to the casing while an angle thereof is set to be different from that of the first light output unit and generates a second light signal having a wavelength different from that of the first light signal, a first branching filter that refracts at least any one of the first light signal and the second light signal so that optical axes of the first light signal and the second light signal are partially overlapped, and one isolator that is located at a portion where optical axes of the first light signal and the second light signal are overlapped and performs isolation on the first light signal and the second light signal. | 10-18-2012 |
20130121638 | OPTICAL MODULE - An optical module includes a light emitting element, an optical fiber, a wavelength separating filter that is arranged at a predetermined angle with respect to a longitudinal direction of the optical fiber on a plane including the longitudinal direction of the optical fiber, and a lens for focusing light emitted from the light emitting element on the optical fiber via the wavelength separating filter. The light emitting element is arranged while being offset in a direction perpendicular to a central axis of the lens on a plane where the wavelength separating filter has the predetermined angle with respect to the central axis of the lens. | 05-16-2013 |