Patent application number | Description | Published |
20090214213 | MODULATION DEVICE FOR GENERATING OPTICAL SIGNAL WITH QUADRUPLE FREQUENCY AND METHOD THEREOF - The present invention discloses a modulation device for generating an optical signal with quadruple frequency and the modulation method thereof. The modulation device in the present invention utilizes a commercial integrated modulator, a RF signal generator and a phase shifter to generate an optical signal with quadruple frequency. When the RF signal generator generates a first modulation signal, and the phase shifter shifts the first modulation signal by 90 degrees to generate a second modulation signal, the integrated modulator is biased to transmit the optical signal in maximum value and to modulate the first and second modulation signal so as to generate a output optical signal with quadruple frequency. | 08-27-2009 |
20100008665 | Optical access system for dual service network - The present invention relates to an optical access system for dual service network, which mainly comprises an optical modulation device which is used to receive on-off keying (OOK) signal from cable network and radio frequency (RF) signal from wireless network, the optical modulation device then modulates the OOK signal and the RF signal to an optical signal and send out an output optical signal. Lastly, the output optical signal is being delivered to an optical receiving device through an optical fiber transmission channel, and the optical receiving device can access the OOK signal and RF signal from the output optical signal. In addition, the present invention does not require remote nodes (receiver side) to use any optical filter to discern on-off keying signal from cable network and RF signal from wireless network. The present invention can also apply to the field of wavelength-division multiplexing system. | 01-14-2010 |
20100008680 | Optical modulating device with frequency multiplying technique for electrical signals - The present invention relates to an optical modulating device with frequency multiplying technique for electrical signals, which primary comprises a mixer, which generates a mixed data signal from a first electrical signal and a second electrical signal. The mixed data signal is then received by a first phase shift device to have its phase shifted and becomes a first shifted signal. The first electrical signal is further received by a second phase shift device to have its phase shifted and becomes a second shifted signal. The present invention further comprises an integrated electro-optic modulator (Mach-Zehnder modulator), which is used to receive an input optical signal, the mixed data signal, the first shifted signal, the second shifted signal and the first electrical signal mentioned above, the integrated electro-optic modulator will then modulates the input optical signal into a frequency multiplying output optical signal that carries the first electrical signal and the second electrical signal. The present invention can carry and transmit amplitude shift keying signals and vector modulation signals, thereby provides a more advanced optical communication transmission service. | 01-14-2010 |
20100073763 | Adjustable optical signal delay module and method thereof - The present invention relates to an adjustable optical signal delay module, particularly to a module, which adjusts power of an amplified spontaneous emission generated by a semiconductor optical amplifier and reversely feeds the adjusted amplified spontaneous emission back to the semiconductor optical amplifier to vary a group refractive index of the semiconductor optical amplifier and delay the timing of an optical signal, whereby the present invention can replace the pump laser conventionally required by a CPO mechanism. In the present invention, the feedback optical loop comprises a variable optical attenuator, an optical filter, and optical circulators. An user can control the delay timing of optical signals via adjusting optical power in the feedback optical loop. The present invention can decrease the fabrication cost of an optical signal delay module and reduce the volume thereof. | 03-25-2010 |
20100104294 | Optical modulation device - The present invention discloses an optical modulation device, which comprises an electric signal generator generating an electric signal carrying a data signal; a first sinusoidal signal generator generating a first sinusoidal signal; an optical signal generator generating an input source optical signal; and an optoelectronic modulator(Mach-Zehnder modulator) receiving the input source optical signal, the electric signal and the first sinusoidal signal, biased to modify a transmission performance of the input source optical signal, modulating the input source optical signal with the electric signal and the first sinusoidal signal, and then sending out an output source optical signal carrying the electric signal and the first sinusoidal signal. The present invention realizes frequency multiplication, enables an optical signal to carry vector signals, and promotes the efficiency of broadband systems. | 04-29-2010 |
Patent application number | Description | Published |
20090289578 | PARALLEL TYPE SINGLE-WIRE ADDRESSABLE LIGHTING DEVICE - A parallel type single-wire addressable light device includes a microprocessor, at least one lighting module and at least one signal amplifier. The microprocessor includes an address transmission line and a data transmission line. The plurality of lighting modules is composed of a control driver and at least one lamp set, and the control driver is connected in parallel to the microprocessor through the address transmission line and the data transmission line. The signal amplifier is electrically connected between the microprocessor and the control driver. The address transmission line of the microprocessor transmits an address define signal to set the address of each lighting module, and then the data transmission line outputs data to control any one or any two or more lighting modules for controlling a change of light. | 11-26-2009 |
20100013396 | LED CONTROL SYSTEM USING MODULATED SIGNAL - An LED control system using a modulated signal includes a computer, a data storage unit, an AC power, a power conversion circuit, a control circuit, and an LED lamp string. The AC power is converted into a DC power by the power conversion circuit to supply a DC voltage to the control circuit and the LED lamp string. A computer control data is sent to the control circuit through the data storage unit by a user using the computer. The computer control data is modulated to a modulated signal by the control circuit. The modulated signal is sent to the LED lamp string with the same transmission line sending the DC voltage. The light of the LED lamp string is changed according to the modulated signal. The cost is reduced because the DC voltage and the modulated signal are sent in the same transmission line. | 01-21-2010 |
20120098444 | DRIVING APPARATUS FOR LIGHT-EMITTING DIODE CURTAIN LAMP - A driving apparatus for light-emitting diode curtain lamp is applied to a direct current power source and at least a light-emitting diode light string. The driving apparatus for light-emitting diode curtain lamp includes a master control unit, at least a slave control unit, and a transmission line. The master control unit is electrically connected to the direct current power source. The slave control unit is electrically connected to the master control unit and the light-emitting diode light string. The transmission line is electrically connected to the master control unit and the slave control unit. The slave control unit is controlled by the master control unit to drive the light-emitting diode light string. The transmission line is used to transit control signals and synchronous signals. | 04-26-2012 |