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| Number | Title | Issue Date |
| 7400791 | Semiconductor element mounting board and optical transmission module An optical transmission module of the invention uses a semiconductor chip forming an optical modulator integrated laser on a semi-insulating semiconductor board. An input transfer line and an anode electrode of an optical modulator element are connected by a first b... | 07/15/2008 |
| 7364929 | Nitride semiconductor based light-emitting device and manufacturing method thereof An object of the present invention is to provide a nitride semiconductor based light-emitting device, which is low in operating voltage reduction and is high in performance, and a manufacturing method thereof. A first metal film is formed on a P-type conducti... | 04/29/2008 |
| 7322752 | Optical device module, optical transmitter and receiver, and optical receptacle An optical device module includes a stub ferrule for guiding a laser light to an optical fiber to be connected, a sleeve for holding an optical-connector ferrule of the optical fiber to be connected and the stub ferrule, a holder for fixing the stub ferrule and the ... | 01/29/2008 |
| 7309879 | Semiconductor laser, manufacturing the same and semiconductor laser device A semiconductor laser element capable of reducing the contact resistance and the thermal resistance and realizing a high reliability is provided. The semiconductor laser element includes: a semiconductor substrate, an active layer formed on the semiconductor substra... | 12/18/2007 |
| 7274837 | Optical transmitter 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 connecte... | 09/25/2007 |
| 7164865 | Optical fiber communication equipment and its applied optical systems 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 respons... | 01/16/2007 |
| 7130100 | Optical module Even for a driving impedance of 25 Ω, high transmission waveform quality of an optical transmission module is maintained using an optical modulator element designed for a driving impedance of 50 Ω. The above can be achieved by adopting an optical module 100... | 10/31/2006 |
| 6873905 | Communications type navigation device 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 r... | 03/29/2005 |
| 6873801 | Optical transmitter and optical transmission system using electro absorption modulator 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 parame... | 03/29/2005 |
| 6831767 | Traveling wave optical modular 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 s... | 12/14/2004 |
| 6829441 | Driver circuit and optical-transmission module 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. Di... | 12/07/2004 |
| 6826211 | Diode laser controling module and applied equipment thereof 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... | 11/30/2004 |
| 6800914 | Semiconductor photodetector device and manufacturing method thereof Reducing a dark current in a semiconductor photodetector provided with a second mesa including an regrown layer around a first mesa. An n-type buffer layer, a n-type multiplication layer, a p-type field control layer, a p-type absorption layer, a cap layer made of p... | 10/05/2004 |
