Optical module
Granted: August 13, 2019
Patent Number:
10381799
An optical module includes a semiconductor laser with an active layer disproportionately positioned closer to the first surface. The semiconductor laser includes a reflector for reflecting the light outgoing from the active layer in a direction along the first surface toward another direction. The active layer and the reflector are monolithically integrated in the semiconductor laser. The optical module includes a carrier formed from a light transmissive material and having a third…
Optical module and method for aligning optical module
Granted: August 13, 2019
Patent Number:
10379303
To provide an optical module and a method for aligning the optical module with which alignment can be easily performed. An optical module includes first optical element sections and a second optical element section optically joined to the first optical element sections. Each first optical element section includes an optical conversion element, a ferrule having a distal end being in contact with and optically joined to the second optical element section, and a first optical system…
Optical semiconductor device, optical module, and method for manufacturing optical semiconductor device
Granted: July 16, 2019
Patent Number:
10355454
Provided is an optical semiconductor device which has long-term reliability since a threshold current is small, and a relaxation oscillation frequency is high. An optical semiconductor device includes an InP semiconductor substrate, a lower mesa structure that is disposed above the InP semiconductor substrate, and includes a multiple quantum well layer, an upper mesa structure that is disposed on the lower mesa structure, and includes a cladding layer, a buried semiconductor layer that…
Optical subassembly, optical module, and optical transmission equipment
Granted: June 25, 2019
Patent Number:
10334717
An optical subassembly includes: a conductor plate having a pair of penetration holes, both penetrating the conductor plate from an outer surface to an inner surface; a pair of lead terminals fixed in the two respective penetration holes and passing through the pair of penetration holes; a wiring board with a pair of wiring patterns arranged on a surface; and a plurality of bonding wires electrically connecting the pair of lead terminals and the pair of wiring patterns. A cross section…
Optical semiconductor device, optical subassembly, and optical module
Granted: June 4, 2019
Patent Number:
10312665
An optical semiconductor device includes an InP substrate; an active layer disposed above the InP substrate; a n-type semiconductor layer disposed below the active layer; and a p-type clad layer disposed above the active layer, wherein the p-type clad layer includes one or more p-type In1-xAlxP layers, the Al composition x of each of the one or more p-type In1-xAlxP layers is equal to or greater than a value corresponding to the doping concentration of a p-type dopant, and the absolute…
Optical module and optical transmission equipment
Granted: June 4, 2019
Patent Number:
10312662
To provide an optical module whose power consumption in an ambient temperature range is reduced, and an optical transmission equipment. The optical module includes: a housing; a box type optical subassembly including a bottom portion serving as a heat dissipation face; and a heat conductive member disposed between the bottom portion of the optical subassembly and a bottom portion of the housing. The optical subassembly includes one or a plurality of optical semiconductor devices, and a…
Optical module and transmission equipment
Granted: June 4, 2019
Patent Number:
10310199
Provided are an optical module and a transmission equipment in which a decrease in yield due to brazing or soldering is suppressed. Provided is an optical module including a semiconductor optical element, a stem, and a wiring substrate. The stem includes one or more lead terminals. The wiring substrate includes one or more openings through which the one or more lead terminals, respectively, pass. The stem has a placing surface on which the wiring substrate is placed, and two protrusion…
Optical transmitter module
Granted: May 28, 2019
Patent Number:
10305599
In an optical transmitter module for combining three or more optical signals different in intensity with an optical multiplexer to generate a PAM signal, the influence of the beat noise and the chromatic dispersion due to the difference in wavelength is reduced. The optical transmitter module includes first through third optical signal sources adapted to output respective optical signals binary intensity modulated with different amplitude from each other, and a combining section. The…
Optical module
Granted: May 7, 2019
Patent Number:
10281666
The invention provides an optical module which is less likely to be damaged, and can be assembled at low cost. The optical module comprises a housing having an electrical signal port for inputting and/or outputting an electrical signal and an optical signal port for inputting and/or outputting an optical signal, a first substrate arranged in the housing so as to connect to the electrical signal port, an optical fiber arranged in the housing so as to connect to the optical signal port,…
Optical module and manufacturing method thereof
Granted: April 9, 2019
Patent Number:
10254490
In an optical module including an optical axis adjustment mechanism, the reliability of fixation of a movable portion is enhanced while an adhesive is prevented from flowing out to an unintended portion. An optical module includes an element portion, a manipulation lever, a bank, a support spring, and a reservoir portion. The bank includes a lever-opposing portion having a step face facing a longitudinal side face of the manipulation lever. The support spring is connected at both ends to…
Optical receiver module and optical module
Granted: April 2, 2019
Patent Number:
10250334
An optical receiver module includes light-receiving elements each having a first electrode and a second electrode to which a bias is applied, and converting input optical signals into electric signals and outputting the electric signals from the first electrodes, and a carrier having wiring patterns respectively electrically connecting to the light-receiving elements and supporting the light-receiving elements. The wiring pattern includes a first wiring line electrically connecting to…
Optical communication system and optical transmitter
Granted: April 2, 2019
Patent Number:
10250333
Provided is an optical communication system capable of suppressing the deterioration of an intensity waveform of an optical intensity modulated signal subjected to transformation using SSB modulation and improving a bit error ratio and a receiver sensitivity of the optical intensity modulated signal. The optical communication system includes: an optical transmitter section including: a single-side band modulation circuit configured to subject a double-side band modulated signal to…
Submount, optical transmitter module, optical module, optical transmission equipment, and control method therefor
Granted: March 19, 2019
Patent Number:
10236660
A submount which has a mounting surface on which three or more semiconductor lasers are arranged in a first direction, and includes a heat generator configured to increase the temperatures of the three or more semiconductor lasers, in which, where the heat generator generates heat, a first heat of the heat absorbed by a first semiconductor laser of the three or more semiconductor lasers disposed at one end along the first direction is larger than a second heat of the heat absorbed by a…
Optical module and optical transmission equipment
Granted: March 12, 2019
Patent Number:
10231327
There is provided an optical module including an optical subassembly including an optical element, a printed circuit board, and a connection substrate. The connection substrate includes a first connection portion connected to a first signal line conductor strip disposed on a first surface and a first ground conductor layer disposed on a second surface. The first connection portion includes a first signal line pad portion, a first ground pad portion, both disposed on the first surface, a…
Semiconductor light receiving device, optical receiver module and manufacturing method thereof
Granted: March 12, 2019
Patent Number:
10230008
Provided are a semiconductor light receiving device, an optical receiver module, and a manufacturing method thereof in which characteristics of the device are improved when the device has a structure in which a mesa structure including layers formed of a common material is buried by a buried layer. The semiconductor light receiving device includes the mesa structure including the layers formed of a commonmaterial, the layers including an absorbing layer, the mesa structure being buried…
Back illuminated photo detector and optical receiver module having a center portion of an exposed contact portion located on an optical axis of light
Granted: February 12, 2019
Patent Number:
10204955
Provided is a back illuminated photo detector enabling easy determination of whether or not the radius of a beam spot on a light absorption layer is an appropriate size. The back illuminated photo detector includes: a semiconductor substrate having a first surface for receiving light; a semiconductor layer that is laminated on a second surface and includes a light absorption layer; a passivation film so as to expose a contact portion that is part of an upper surface of the semiconductor…
Dither free bias control
Granted: January 29, 2019
Patent Number:
10191306
A Mach-Zehnder modulator for modulating optical signals, and comprising: a plurality of modulating waveguide sections; at least one bias electrode in electrical communication with at least one modulating waveguide section and configured to apply at least one electrical bias signal to one or more of the modulating waveguide sections; and an output optical combiner comprising a plurality of inputs and a plurality of outputs, wherein the plurality of inputs of the combiner are in optical…
Optical communication system and optical transmitter
Granted: January 22, 2019
Patent Number:
10187158
Provided is an optical communication system capable of suppressing the deterioration of an intensity waveform of an optical intensity modulated signal subjected to transformation using SSB modulation and improving a bit error ratio and a receiver sensitivity of the optical intensity modulated signal. The optical communication system includes: an optical transmitter section including: a single-side band modulation circuit configured to subject a double-side band modulated signal to…
Optical transmitter module
Granted: January 22, 2019
Patent Number:
10187157
To provide an optical transmitter module with simplified control of a voltage to be applied to an optical modulator. An optical transmitter module includes a semiconductor laser for irradiating a laser beam; a demultiplexer for branching the laser beam to output branched light beams; optical modulators for modulating an optical amplitude of each of the branched light beams into a first optical amplitude or a second optical amplitude, depending on an input level at two levels; and a…
Semiconductor optical device, optical module, and method for manufacturing semiconductor optical device
Granted: January 15, 2019
Patent Number:
10181699
A semiconductor optical device includes: a first conductive type semiconductor layer; an active layer; a second conductive type semiconductor layer including a ridge portion; a pair of first grooves, formed on bottom surfaces of both sides of the ridge portion and dividing the active layer; an optical functioning part including the first and second conductive type semiconductor layers, converting a state of light, and having a height higher than a height of the bottom surface of the…
