Optical signal generator
Granted: October 31, 2017
Patent Number:
9806821
Multilevel optical intensity modulation high in accuracy is performed using electro-absorption optical modulators. There is provided a plurality of EA modulators connected in series in a path of an optical signal from a light source, and a multilevel-coded modulated optical signal is generated by modulating an intensity of an input optical signal from the light source based on a modulation signal using the EA modulators. Each of the EA modulators is switched between an ON state and an…
Optical semiconductor resonator, optical semiconductor device, and optical module
Granted: October 17, 2017
Patent Number:
9791622
In order to prevent non-uniformity in emission wavelength among different sites along an optical axis direction, provided is a resonator portion including: a waveguide which includes a first area and a second area being adjacent to the first area; and diffraction gratings formed along an optical axis direction. The effective refraction index in the first area is larger than the one in the second area, and the thickness in the first area is larger than the one in the second area. A pitch…
Optical component
Granted: October 10, 2017
Patent Number:
9787402
Methods and apparatus for use in coherent transmission and reception of optical data signals. An integrated optics block (100) for use in a coherent optical transmitter comprising: a beam splitter (102) configured to split an input light signal into first and second input light signals, to output the first input light signal for use in an optical transmitter chip and to output the second input light signal for use as a local oscillator signal; a polarization combiner (104) configured to…
Differential transmission circuit, optical module and manufacturing method of differential transmission circuit
Granted: October 3, 2017
Patent Number:
9781824
A differential transmission circuit includes: a dielectric layer for embedding a plurality of first strip conductor pairs arranged side by side in the same layer above a ground conductor layer, each of the plurality of first strip conductor pairs including a first right strip conductor and a first left strip conductor, the dielectric layer being formed from an upper side of the ground conductor layer up to a region above the plurality of first strip conductor pairs, the dielectric layer…
Semiconductor integrated optical device, manufacturing method thereof and optical module
Granted: October 3, 2017
Patent Number:
9780530
Provided is a butt-jointed (BJ) semiconductor integrated optical device having a high manufacturing yield. A semiconductor integrated optical device, which is configured such that, on a semiconductor substrate, a first semiconductor optical element including an active layer and a second semiconductor optical element including a waveguide layer are butt-jointed to each other with their optical axes being aligned with each other, includes: a semiconductor regrowth layer including at least…
Semiconductor optical device and manufacturing method thereof
Granted: October 3, 2017
Patent Number:
9780529
To provide a semiconductor optical device with device resistance reduced for optical communication. The semiconductor optical device includes an active layer (306) for emitting light through recombination of an electron and a hole; a diffraction grating (309) having a pitch defined in accordance with an output wavelength of the light emitted; a first semiconductor layer (311) including at least Al, made of In and group-V compound, and formed on the diffraction grating; and a second…
Semiconductor optical device, arrayed semiconductor optical device, and optical module
Granted: October 3, 2017
Patent Number:
9778428
Provided is a semiconductor optical device, an arrayed semiconductor optical device, an optical module having a structure to reduce the parasitic capacitance as well as a high design degree of freedom and having a multilayer structure in which a semi-insulating substrate, a first semiconductor layer having one conductive type, an active layer having light emission function, a second semiconductor layer having the other conductive type, an insulating layer, and a conductive layer are…
Optical module
Granted: September 12, 2017
Patent Number:
9762026
An optical module includes a semiconductor optical device in which an active layer located at one side, an electrode located at the same side, and a mirror that reflects light toward the side opposite the electrode are monolithically integrated, a sub-mount having one surface on which a first wiring pattern is formed, a substrate in which an optical waveguide and a grating coupler are formed in a surface layer of the substrate, a spacer having an upper surface on which a second wiring…
Optical signal generator
Granted: August 8, 2017
Patent Number:
9726914
Preferable simultaneous achievement of the target characteristics with respect to both of the modulation bandwidth and the extinction ratio in the optical intensity modulation using the electro-absorption optical modulator is realized with a simple circuit configuration. The modulator integrated semiconductor laser element includes a plurality of EA modulators disposed in series in an optical signal path, and each adapted to absorb light in accordance with an applied voltage. The…
Optical transmission module and optical transceiver
Granted: July 11, 2017
Patent Number:
9705602
The optical transmission module, which is configured to input differential signals including a positive-phase signal and a negative-phase signal, includes: a laser oscillator configured to output laser light; an optical modulator configured to modulate the laser light based on the positive-phase signal; a negative-phase terminating resistor configured to terminate the negative-phase signal; a Peltier device including a first region and a second region in which heat is exchanged; a…
Optical transceiver
Granted: July 11, 2017
Patent Number:
9703053
An optical transceiver is configured to use, as an electric signal, a digital modulation signal having a predetermined bit rate. The optical transceiver includes a case having a space for storing a component therein and a resistor being arranged between upper and lower surfaces of the space and having conductance of from 1 S/m to 1,000 S/m. The space has a height equal to or less than a wavelength in a free space of an electromagnetic wave of a frequency corresponding to the…
Optical module
Granted: June 27, 2017
Patent Number:
9692203
An optical module includes: a wiring substrate that has a wiring pattern including a connecting portion and is arranged on an optical subassembly so as to be electrically connected thereto; and a flexible insulating layer formed between the optical subassembly and the wiring substrate. The optical subassembly includes: a conductive stem that has a surface opposed to the wiring substrate, the conductive stem being shaped so that the surface has a through hole opened therein and being…
Optical transmission module and manufacturing method thereof
Granted: May 30, 2017
Patent Number:
9664866
An optical transmission module in which optical axis adjustment is possible in a wide range and with a high accuracy, and a method of manufacturing the optical transmission module are provided. An optical transmission module includes a light source that outputs light, a mirror that reflects the light output by the light source, a lever on which the mirror is arranged and that has a fulcrum, a lens that converges the light reflected by the mirror, and a waveguide that transfers the light…
Horizontal cavity surface emitting laser device
Granted: March 21, 2017
Patent Number:
9601903
A horizontal cavity surface emitting laser device includes an active layer configured to generate light to be emitted in one direction along the one surface of a semiconductor substrate and in another direction opposite to the one direction. The device also includes a rear distributed Bragg reflector unit configured to reflect the light. The rear distributed Bragg reflector unit includes a waveguide layer configured to guide light and a distributed Bragg reflector configured to reflect…
Optical module, optical transceiver, printed circuit board, and flexible printed circuit board
Granted: January 10, 2017
Patent Number:
9544059
An optical module includes: a first circuit board including a first signal terminal part and a first ground terminal part formed on a front surface; and a second circuit board including a second signal terminal part and a second ground terminal part formed on a back surface. The first circuit board further includes: a first dielectric layer; a first signal wire formed on a front surface of the first dielectric layer; a first ground conductor layer formed on a back surface of the first…
Optical module and method of manufacturing optical module
Granted: December 27, 2016
Patent Number:
9530907
An optical module includes an optical semiconductor device and a stem including a lead terminal configured to perform at least one of transmitting an electric signal to the optical semiconductor device or transmitting an electric signal output from the optical semiconductor device. The optical module also includes a substrate having a ground layer, a first opening through which the lead terminal passes, and a connecting portion configured to electrically connect the stem and the ground…
Optical transmission module and manufacturing method thereof
Granted: December 20, 2016
Patent Number:
9523825
An optical transmission module in which optical axis adjustment is possible in a wide range and with a high accuracy, and a method of manufacturing the optical transmission module are provided. An optical transmission module includes a light source that outputs light, a mirror that reflects the light output by the light source, a lever on which the mirror is arranged and that has a fulcrum, a lens that converges the light reflected by the mirror, and a waveguide that transfers the light…
Optoelectronic assembly
Granted: November 29, 2016
Patent Number:
9509118
The invention relates to an optoelectronic assembly. The optoelectronic assembly comprises one or more optoelectronic components and a housing. The housing comprises an outer wall electrically connected to the one or more optoelectronic elements. The housing is configured to provide an electrical interface between the one or more optoelectronic components and an external electronic device. The electrical connection between the outer wall and the one or more optoelectronic components…
Optical module
Granted: November 22, 2016
Patent Number:
9500825
A flexible wiring board includes a conductive film provided on one surface of a substrate. The conductive film includes a plurality of pad portions to which a plurality of connection electrodes are respectively bonded with solder, and a wiring portion extending in a direction crossing a row in which the plurality of pad portions are arranged. The plurality of pad portions include a terminal portion electrically connected with the wiring portion, and at least two land portions located on…
Reduced length optoelectronic devices
Granted: November 8, 2016
Patent Number:
9488784
There is described an optoelectronic device having a housing and a chip housed by the housing. At least a portion of the chip protrudes through an aperture in a wall of the housing. There is further provided an optoelectronic module comprising such an optoelectronic device and electronic control circuitry adapted to control the operation of the optoelectronic device.
