Small form-factor pluggable bail latch
Granted: August 16, 2005
Patent Number:
6929403
An optical module having a latching mechanism to allow the module to be latched to a cage of a host system is disclosed. The latching mechanism includes a latch boss that can be engaged by a latch attached to the host cage to capture the module. The latching mechanism also includes a latch key that slides towards the latch boss to disengage the latch from the latch boss. The latch key is moved by a bail that rotates and exerts a force on the latch key by a cam surface.
Optical transmission module
Granted: August 9, 2005
Patent Number:
6927655
There is provided a thin and small size connector-less optical transmission module M which assures excellent high frequency characteristic. This optical transmission module comprises transmission line substrates and a coaxial cable for connecting these transmission line substrates and is connected to the transmission line substrate via a contact sleeve which is provided with projections fixed to the external conductor of the coaxial cable and projected in the extending direction of the…
Optical transmission module
Granted: August 2, 2005
Patent Number:
6923580
An optical transmission module includes a housing with a heat radiating fin and a receptacle for being connected to an external optical fiber. The module also includes a coaxial can stem for mounting an optical element and a ceramic printed circuit board. The signal transmission lines are provided on one side of the board, and heat from the coaxial can package is radiated from the radiating fin.
Optical transmitter and optical transmitting apparatus using the same
Granted: August 2, 2005
Patent Number:
6925264
An optical transmitter for use in an optical transmitting system based on PDS (Passive Double Star) technology, does not erroneously output an optical signal when the optical transmitter is powered on/off. The optical transmitter has a current source 1 for outputting a drive current having a magnitude corresponding to an input control signal, a Laser diode (LD) for generating an optical output signal based on the received drive current, a modulator 9 for controlling the supply and cutoff…
Receiver optical sub-assembly with diagnostic signal
Granted: July 26, 2005
Patent Number:
6922231
A fiber-optic receiver apparatus is described, which monitors and outputs the average received optical power of the incoming optical data beam, as well as the differential amplitude signal.
Optical module which permits stable laser output
Granted: June 28, 2005
Patent Number:
6912363
An optical module for use in detecting a plurality of different wavelengths by making use of the multiple wavelength selectivity of an etalon. The optical module includes a semiconductor laser, a lens for converting a beam emitted from the semiconductor laser into a substantially parallel beam, a beam splitter for splitting the converted beam into a reflected beam and a transmitted beam, and a light-receiving element disposed such that one of the split beams is incident thereupon through…
Optical transmitter and optical transmitting apparatus using the same
Granted: May 31, 2005
Patent Number:
6901223
An optical transmitter for use in an optical transmitting system based on PDS (Passive Double Star) technology, does not erroneously output an optical signal when the optical transmitter is powered on/off. The optical transmitter has a current source 1 for outputting a drive current having a magnitude corresponding to an input control signal, a Laser diode (LD) for generating an optical output signal based on the received drive current, a modulator 9 for controlling the supply and cutoff…
Mountable optical transceiver
Granted: May 17, 2005
Patent Number:
6893167
Optical transceiver modules which may be attached to printed circuit boards or other planar supports are presented. The optical transceiver module includes a housing mountable on a board such that a first portion of the housing is above a plane of the board and a second portion of the housing is below the plane of the board. The board may be any planar support, including a circuit board. The plane may be any plane in the board such as a center plane, for example.
Control method and apparatus for stabilizing optical wavelength
Granted: May 10, 2005
Patent Number:
6891867
A control apparatus for stabilizing optical wavelength output by a laser module in which a laser element, temperature sensor and cooling/heating element are installed, comprises a temperature deviation detecting circuit comprising a temperature monitor for detecting a laser temperature, and a first comparator for outputting a first control signal indicating a difference between the laser temperature and a control target value, a wavelength deviation detecting circuit comprising a…
Communications type navigation device
Granted: March 29, 2005
Patent Number:
6873905
There is provided a communications-type car navigation system including a vehicle-mounted terminal and a server. When transferring, to the terminal, the result of a route searching which the server has performed, the server transfers the data that will satisfy the requirements of a route guiding method which the user wishes. Also, the server transfers the route data that has been compressed. Concerning the map data as well, the server transfers only the necessary attributes thereof.…
Optical transmitter and optical transmission system using electro absorption modulator
Granted: March 29, 2005
Patent Number:
6873801
In the application of the optical transmitter to any system for the compensation of passing degradation, the invention provides the optical transmitter which maintains constant modulator output and the highly reliable optical transmission by tuning, the alpha parameter for given systems. As the optical element back-face output power detected by PD6 depends on the optical element driving current amount, the electronic absorption amount of the EA optical modulator monitored by the…
Filter based multiplexer/demultiplexer component
Granted: March 22, 2005
Patent Number:
6870976
A multiplexer/demultiplexer optical system component that is passively aligned upon assembly is disclosed. The optical system includes a lens block and a mirror-filter block. In some embodiments, optical filters are positioned and epoxyed to the mirror-filter block using a positioning tool. In some embodiments, optical filters are positioned and epoxyed on a support structure which has been etched to receive the optical filters. The mirror-filter block is a block having flat surfaces,…
Optical transmission module with light element temperature control
Granted: March 15, 2005
Patent Number:
6868235
An optical transmitter receiver module and an apparatus incorporating the same module are provided, which realizes the reduction of power consumption and the enlargement of the operating temperature range. As an example, an optical transmitter module is provided which comprises a light emitting element to generate a light signal, a signal processing circuit to transmit an electrical signal to the light emitting element and a voltage regulating circuit to lower a power voltage so as to…
Optical transmission module and the production method of the same
Granted: March 8, 2005
Patent Number:
6864511
An optical transmission module with an optical device mounted in a substrate provided with an optical waveguide is provided wherein respective metallic electrodes in pair are symmetrically disposed in each side of an optical device divided by a centerline parallel to an optical axis such that those electrodes have an error of 60 ?m or less and said metallic electrodes are soldered to a metallic electrode as disposed on a substrate, which electrode has a size enough to cover those…
Transmission line, optical module using the same and manufacturing method of optical module
Granted: February 15, 2005
Patent Number:
6856442
According to the present invention there are provided a transmission line and an optical module having the transmission line, the transmission line having on a dielectric substrate a first signal wiring conductor, a second signal wiring conductor insulated from the first signal wiring conductor, a first electrode disposed near the first and second signal wiring conductors, a second electrode disposed near the second signal wiring conductor, and a ground wiring conductor disposed in…
Optical modulation device
Granted: February 15, 2005
Patent Number:
6856709
The provision of a coplanar waveguide coupled with a microstrip line with a transmission line substrate that is used between two functional units of different impedance characteristics allows the input and output impedance matching to be performed, the impedance matching between which coplanar waveguide and microstrip line is performed by the variation of the signal linewidth. It allows the transmission characteristics of the optical transmission device in high frequency band to improve.
Traveling wave optical modular
Granted: December 14, 2004
Patent Number:
6831767
An optical modulator having a good reflection characteristic over a broad band is provided, with a small semiconductor chip area, by use of a semiconductor chip on which a semiconductor optical modulator is mounted. A typical example of the optical modulator has a structure in which a semiconductor chip provided with an electro-absorption semiconductor optical modulator comprising an electrode of traveling wave modulator is mounted on a dielectric substrate provided with a transmission…
Driver circuit and optical-transmission module
Granted: December 7, 2004
Patent Number:
6829441
A driver circuit comprises a first differential-amplifier circuit having a pair of first transistors with emitters thereof connected to each other and a first resistor provided between an emitter connection point of the first transistors and a first power supply. Different electric potentials are applied to the bases of the pair of the first transistors to set a ratio of a current flowing through one of the pair of the first transistors to a current flowing through the other first…
Diode laser controling module and applied equipment thereof
Granted: November 30, 2004
Patent Number:
6826211
Conventionally, in the wavelength locking optical system, the wavelength as detected is deviated from a targeted range owing to the change of the peripheral temperature resulting from the temperature characteristics of the wavelength error detection device. To solve this prior issue, it is arranged such that a portion of the wavelength error detection device, through which portion light-beams passes, contacts a material of high heat conductivity.
Optical coupling apparatus
Granted: November 23, 2004
Patent Number:
6821030
In an optical coupling apparatus, an optical isolator and an optical fiber are arranged inside a pipe of a side surface of a package. A distal end of the optical fiber is arranged within a range of 3.0 mm from an inner/outer surface of the side surface of the package and a distance from a laser diode to the distal end is within a range from 3.5 to 7.5 mm. Distance from the inner side surface of the package to a Peltier device is within a range of 6.0 mm. A metallize pattern film applied…
