Three cam bail latch device and method
Granted: December 11, 2007
Patent Number:
7306473
The present invention provides a three cam bail latch system and a method for disconnecting an electronic component from a port using the three cam bail latch system.
Semiconductor optical device and manufacturing method thereof
Granted: October 9, 2007
Patent Number:
7279349
In a dry etching step for an organic material film, a fluorine-containing member is disposed to the periphery of a semiconductor substrate disposed on a lower electrode or a tray for wafer transportation to form fluorine (fluoro-radicals) from the member per se in addition to the fluoric gas added to the etching gas, with a purpose of removing reaction products, thereby removing reaction products deposited on the semiconductor substrate efficiently and stably.
Optical transmitter
Granted: September 25, 2007
Patent Number:
7274837
An optical transmitter in which a microstripline is formed by a signal wiring pattern and a GND conductor pattern on a circuit board (including a flexible board), and a signal lead of a light emitting element module is mounted in a signal lead mounting hole connected with said signal wiring pattern so as to be connected with said signal wiring pattern, wherein a pattern adapted to add capacitance between a stem of said light emitting element module and said signal wiring pattern is…
Optical module device driven by a single power supply
Granted: April 3, 2007
Patent Number:
7199441
An optical integrated circuit having optical devices is fabricated. These optical devices must be biased in the mutually opposite directions. If such an optical integrated circuit is fabricated using a conductive semiconductor substrate as conventionally, it is not possible to drive the devices by a single power supply since the substrate side is shared as a common polarity by the devices. The present invention realizes a structure where both anode and cathode of each device can be…
Semiconductor optical amplifier and optical module using the same
Granted: March 13, 2007
Patent Number:
7190872
The present invention provides a polarization dependency-free, gain-saturated high function semiconductor optical amplifier and optical module at industrially low cost. The gist of the present invention is to structurally separate the optical signal propagating waveguide from another optical waveguide which serves as a lasing optical cavity for optical amplification in such a manner that the two optical waveguides are formed in the same plane but not parallel to each other.
Optical transmission controller
Granted: February 27, 2007
Patent Number:
7184671
An optical transmission controller for controlling an optical transmission system is presented. The optical transmission controller according to the present invention includes a laser controller, a modulator block controller, and a modulation driver controller. In some embodiments, the optical transmission controller is formed on a single integrated circuit chip. In some embodiments, the optical transmission controller includes a digital signal processor or microprocessor executing…
High-frequency transmission line and an optical module incorporating the same line
Granted: February 13, 2007
Patent Number:
7177549
A transmission line with a bending portion is provided, which line comprises any one of a coplanar line, another coplanar waveguide line formed on the dielectric substrate under which a ground layer is provided and a coplanar strip line. A chamfered portion is provided on the outer angular portion of the bending portion of the signal wiring conductor and a triangular conductor is disposed to an inner angular portion thereof. Given that length of the chamfered portion is defined as a, and…
Optical signal receiving module, optical signal receiver and optical fiber communication equipment
Granted: January 30, 2007
Patent Number:
7171128
On a chip carrier, on a printed circuit board or in a pre-amplifier circuit, a resistor or an impedance is connected to either or both of the anode side and the cathode side of a photo detector. A bypass capacitor of bias power supply for photo detector is grounded either directly or via a resistor or an impedance.
Optical transmission module
Granted: January 23, 2007
Patent Number:
7167494
The present invention provides an optical transmission module configured such that a driver IC chip to drive a semiconductor laser device, a first insulation plate having the semiconductor laser device mounted thereon and a coupling optical component are mounted in this order, a thin film inductor element and thin film resistor element which are connected in parallel are formed on a second insulation plate and a bias current is supplied to the semiconductor laser device via this LR…
Optoelectronic transceiver with power voltage supply detection
Granted: January 23, 2007
Patent Number:
7167654
Optical transmission equipment with more than one power supply which can, when turning on the power supplies, set predetermined function of a signal processing circuit after a predetermined time period after the last turn-on of the power supply and can enable the operation of a drive circuit of the light emitting device after an additional predetermined time period.
Optical fiber communication equipment and its applied optical systems
Granted: January 16, 2007
Patent Number:
7164865
An object of disclosed technology is to control lasing wavelengths so that a wavelength shift does not occurs. Another object is to permit wavelengths of a light source for wavelength division multiplexing optical-fiber communication system to be variable in response to an ITU-TS grid. A means for achieving the objects is as follows: locating an etalon in a light path of diode laser light, which is a parallel plane wave changed by a collimator lens; generating a wavelength error signal…
Optical modulator module
Granted: December 12, 2006
Patent Number:
7149024
The present invention provides an optical modulator module comprising: a chip carrier; a semiconductor optical modulator for modulating light based on an electronic signal; a strip conductor electrically connected to the semiconductor optical modulator; a first resistor electrically connected to the semiconductor optical modulator; and a second resistor electrically connected in series to the first resistor; wherein the semiconductor optical modulator, the strip conductor, and the first…
XFP adapter module
Granted: November 14, 2006
Patent Number:
7134796
A device which in an optical interface adapts XFP to a 300 pin MSA transponder socket, permitting replacement of 300 pin MSA transponders with an XFP module on an existing host circuit pack. The device performs dispersion compensation in a removable module, addressing issues of jitter, path length equalization, cross talk and electromagnetic compatibility. As deployed, the device presents at the optical interface the attributes of XFP, hence connected optical devices are “fooled”…
Optical module
Granted: October 31, 2006
Patent Number:
7130100
Even for a driving impedance of 25 ?, high transmission waveform quality of an optical transmission module is maintained using an optical modulator element designed for a driving impedance of 50 ?. The above can be achieved by adopting an optical module 100 that includes an input electrode for electrical signals, an optical modulator element for modulating laser light using the electrical signals, a termination resistance element, a first bonding wire for connecting the input electrode…
Semiconductor optical amplifier, and optical module using the same
Granted: October 24, 2006
Patent Number:
7127145
The present invention provides a polarization dependency-free, gain-saturated high function semiconductor optical amplifier and optical module at industrially low cost. The gist of the present invention is to structurally separate the optical signal propagating waveguide from another optical waveguide which serves as a lasing optical cavity for optical amplification in such a manner that the two optical waveguides are formed in the same plane but not parallel to each other.
Phase frequency synchronism circuitry and optical receiver
Granted: August 29, 2006
Patent Number:
7099407
In order to solve the problem that since a loop filter constant suitable for asynchronous state cannot be selected in the conventional phase frequency synchronism circuit, it takes a long time to synchronize the input data and the clock signal from the asynchronous state, the present invention is to propose a phase frequency synchronism circuit including a phase comparator for generating a voltage according to the phase difference of the clock signal to the input signal, a frequency…
Directly modulated optical module and method for driving semiconductor laser included therein
Granted: June 27, 2006
Patent Number:
7068691
In a directly modulated optical module, the input current to drive the semiconductor laser is controlled so as to make a rate of change in fall time smaller than a rate of change in rise time (inclination) in order to improve the eye opening of an eye pattern and extend the transmission distance. In addition, the input current is overshot at least during the period of transient state following the rising edge.
Optical transmission module
Granted: May 16, 2006
Patent Number:
7044652
A semiconductor laser and an optical fiber are optically coupled via a first lens and a second lens, the second lens is previously fixed to a module package and these parts are mounted to the module package, when focal lengths of the first lens and the second lens are respectively designated by f1 and f2, an optical distance between a principal plane of the first lens on its side of the second lens and a principal plane of the second lens on its side of the first lens, is made…
Optical transmission module
Granted: May 2, 2006
Patent Number:
7037000
The present invention provides an optical transmission module comprising: a laser diode; a lens for condensing a laser beam from the laser diode; a fiber ferrule which is placed so that the laser beam condensed by the lens can enter a fiber core; and a lens aperture or a lens aperture portion which is provided at one of the lens itself, a position before the lens and a position after the lens. In addition, the present invention provides an optical transmission module in which instead of…
Semiconductor optical devices and optical modules
Granted: May 2, 2006
Patent Number:
7038233
An InGaAlAs-based buried type laser is expected to improve properties of the device, but generates defects at a re-growth interface and is difficult to realize a long-term reliability necessary for optical communication, due to inclusion of Al in an active layer. A semiconductor optical device and an optical module including a package substrate and a semiconductor optical device mounted on the package substrate are provided, whereby there are realized the improvement of device properties…
