Patent application number | Description | Published |
20090041472 | AUTOMATIC ADJUSTING SYSTEM OF FREQUENCY SHIFT KEYING MODULATOR - An optical modulator achieving high extinction ratio and an optical modulator system. By a control system performing an adjustment method comprising predetermined steps by applying a bias voltage daringly to a modulation electrode for switching the USB signal and LSB signal of an established optical SSB modulator or optical FSK modulator, a means for adjusting bias voltage applied to each bias electrode preferably automatically is provided and a bias point where the extinction ratio of an optical modulator is maximized can be obtained. | 02-12-2009 |
20090103163 | RECIPROCATING OPTICAL MODULATION SYSTEM - In order to provide a reciprocating optical modulation system capable of obtaining a broad bandwidth, a reciprocating optical modulation system ( | 04-23-2009 |
20090103924 | FOURTH HARMONIC GENERATING SYSTEM USING OPTICAL DOUBLE SIDE-BAND SUPPRESSED CARRIER MODULATOR - The present invention is to provide an optical modulating system for generating a signal of a frequency (f | 04-23-2009 |
20090232440 | DSB-SC MODULATION SYSTEM CAPABLE OF ERASING CARRIER AND SECONDARY COMPONENT - It is an object of the present invention to provide an optical modulation system capable of suppressing a carrier component (f | 09-17-2009 |
20090238510 | OPTICAL AMPLITUDE MODULATION SYSTEM CAPABLE OF CANCELLING HIGH ORDER COMPONENT - It is an object of the present invention to provide a DSB-SC system capable of suppressing a third order component. The DSB-SC modulation having high extinction ratio can be realized by adjusting the first order component, which is generated by applying a modulation signal ( | 09-24-2009 |
20090279825 | OPTICAL FSK/SSB MODULATOR HAVING INTENSITY BALANCE FUNCTION - It is an object of the present invention to provide an optical modulator which is capable of adjusting optical intensity of optical signals which contains non-desired components so that the intensity of the components become at a similar level, whereby the optical modulator is capable of effectively suppressing the non-desired components when the optical signals are combined. | 11-12-2009 |
20090290148 | METHOD AND DEVICE FOR CALIBRATING A LIGHT INTENSITY MEASUREMENT DEVICE - It is an object of the present invention to provide a method and a device for automatically calibrating a light intensity measurement device. The device ( | 11-26-2009 |
20090310900 | SUPER FLAT OPTICAL FREQUENCY COM SIGNAL GENERATOR - An optical frequency COM generator generating an optical frequency COM having flat spectrum characteristics using a single modulator. The optical frequency COM generator has a drive signal system ( | 12-17-2009 |
20100014874 | PHASE CONTROL OPTICAL FSK MODULATOR - There is provided an optical modulator capable of controlling the phase of a USB signal and the phase of an LSB signal of an optical FSK modulated signal. A modulation signal is applied to a main Mach-Zehnder electrode (or an electrode C) ( | 01-21-2010 |
20100053732 | High-Speed Multiplied Signal Generating Method And Device - It is an object of the present invention to provide an apparatus that can obtain a multiplied harmonic signal fast and with ease, and the method using the apparatus. | 03-04-2010 |
20100150495 | OPTICAL SWITCH SYSTEM USING OPTICAL INTERFERENCE - It is an object of the present invention to provide an optical switch system using optical interference. An optical switch system ( | 06-17-2010 |
20100202785 | QUADRATURE AMPLITUDE MODULATION SIGNAL GENERATING DEVICE - A quadrature amplitude modulation (QAM) signal generator, which can obtain optical signals such as QAM signals without handling multilevel electrical signals, can be produced by using a plurality of parallel Mach-Zehnder modulators (MZMs), such as quadruplex parallel MZMs (QPMZM). The quadrature amplitude modulation (QAM) signal generator includes a first waveguide, a first quadrature phase-shift-keying (QPSK) signal generator provided on the first waveguide, a second waveguide connected with the first waveguide at a wave-combining point, and a second quadrature phase-shift-keying (QPSK) signal generator provided on the second waveguide. | 08-12-2010 |
20110097029 | Super Flat Optical Frequency Comb Signal Generator - It is an object of the present invention to provide an optical frequency comb generator to generate an optical frequency comb with flat spectral properties using a single modulator. The optical frequency comb generator comprises: a drive signal system ( | 04-28-2011 |