| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 81 | ALL OPTICAL LOGIC USING CROSS-PHASE MODULATION AMPLIFIERS AND MACH-ZEHNDER INTERFEROMETERS WITH PHASE-SHIFT DEVICES | US09682283 | 2001-08-14 | US20030002797A1 | 2003-01-02 | Tzu-Yih Chu; Shyang Chang; Chi Au; Abraham C. Ma |
| Optical logic gates are constructed from Mach-Zehnder interferometer (MZI) optical circuits. A multi-mode interference (MMI) splitter divides a continuous-wave input into two branches of the interferometer. Each branch has a semiconductor optical amplifier (SOA). When a logic input having a logic-high power level is applied to one of the SOA's, cross-phase modulation occurs in the SOA. The phase shift increases through the SOA. The branch coupled to the logic input has a relative phase shift of null compared with the other branch. When two branches with the null phase difference are combined, destructive interference occurs, producing a logic low. An MMI combiner or an equivalent phase shifter is used to combine the two branches. The MMI splitter adds a phase shift of null/2 to the upper branch but not to the lower branch, while the MMI combiner also adds null/2 shifts. | ||||||
| 82 | Generation of optical signals with return-to-zero format | US09971831 | 2001-10-04 | US20020196508A1 | 2002-12-26 | Haiqing Wei; Aly F. Elrefaie; Xin Xue; Shih-Yuan Wang |
| An optical return-to-zero (RZ) signal generator and related methods are described in which a phase modulator causes a phase change in an optical signal responsive to a transition in a driving signal, and in which an interferometer receives the optical signal from the phase modulator and generates an optical pulse responsive to that phase change. Preferably, the interferometer introduces a fixed, unmodulated time delay between its two signal paths, the fixed time delay being selected such that destructive interference occurs at an output of the interferometer when the phase of the optical signal received from the phase modulator remains constant. However, when a rising or falling edge of the driving signal causes phases changes in the optical signal, the destructive interference at the output of the interferometer is disturbed, and an optical pulse is generated. The driving signal is a differentially encoded version of an input information signal. Alternatively, the driving signal is proportional to the input information signal and the transmitted RZ-formatted optical signal is a differentially encoded version of that signal. Features for regulating the fixed time delay, features for frequency shift compensation, features for loss compensation/equalization, and integrated single-chip and multiple-chip embodiments are also described. | ||||||
| 83 | Optical detection and logic devices with latching function | US869901 | 1997-06-05 | US5999284A | 1999-12-07 | Kim Byron Roberts |
| An optical logic device is provided by an interferometer in which an output optical signal is determined in accordance with an interference condition of the interferometer. The interference condition is reset by an optical setting signal which is counter-propagated through a semi-conductor optical amplifier forming one arm of the interferometer. Latching of the interference condition in the set state is achieved by a feedback signal taken from the output optical signal and combined with the setting signal. Resetting of the interference condition is achieved by nulling the output optical signal by counter-propagating a reset optical signal via second semiconductor optical amplifier constituting the second arm of the interferometer. Alternatively the input optical signal to the interferometer may be interrupted to null the output. A further alternative arrangement utilizes an electrical re-setting signal which actuates an electrical phase shifting device in the second arm of the interferometer. The device has particular application to all optical control of high bit rate communication signals. | ||||||
| 84 | 포토믹서 모듈 및 그것의 테라헤르츠파 발생 방법 | KR1020090126196 | 2009-12-17 | KR101385108B1 | 2014-04-29 | 김남제; 박경현; 임영안; 한상필; 이철욱; 심은덕; 신재헌 |
| 본 발명은 테라헤르츠파를 생성 및 검출하기 위한 포토믹서 모듈에 관한 것이다. 본 발명의 실시 예에 따른 포토믹서 모듈은, 입사되는 레이저광을 증폭시키는 반도체 광증폭기; 그리고 상기 증폭된 레이저광에 여기되어 연속 테라헤르츠파를 생성하는 포토믹서를 포함하되, 상기 반도체 광증폭기와 상기 포토믹서는 단일 모듈로 형성된다. | ||||||
| 85 | 광신호 증폭 3 단자 장치, 이 장치를 이용한 광신호 전송방법, 광신호 중계 장치 및 광신호 기억 장치 | KR1020057007066 | 2003-09-19 | KR100956054B1 | 2010-05-06 | 마에다요시노부 |
| When in an optical signal amplifying triode 10, light of a second wavelength lambda 2, selected from among light from a first optical amplifier 26, into which a first input light L1 of a first wavelength lambda 1 and a second input light L2 of second wavelength lambda 2 have been input, and a third input light (control light) L3 of a third wavelength lambda 3 are input into a second optical amplifier 34, an output light L4 of the third wavelength lambda 3, selected from among the light output from the second optical amplifier 34, is light that is modulated in response to the intensity variation of one or both of the first input light L1 of the first wavelength lambda 1 and the third input light L3 of the third wavelength lambda 3 and is an amplified signal, with which the signal gain with respect to the third input light (control light) L3 of the third wavelength lambda 3 is of a magnitude of 2 or more. An optical signal amplifying triode 10, which can directly perform an optical signal amplification process using control input light, can thus be provided. <IMAGE> | ||||||
| 86 | 신호 재생기 | KR1020040100426 | 2004-12-02 | KR1020060061631A | 2006-06-08 | 김동철; 이대수; 임영안; 심은덕; 박경현 |
| 본 발명은 광통신 시스템에서 광섬유를 통해 전송된 광신호의 왜곡을 보정하기 위한 신호 재생기에 관한 것으로, 서로 다른 길이의 반도체 광증폭기를 구비하며 2R(re-amplifying, re-shaping) 재생하는 비대칭형 마흐-젠더 간섭계와 서로 다른 길이의 광도파로를 구비하는 지연간섭계로 구성되어 제작이 용이하고 초고속 신호의 재생이 가능하다. 신호 재생기, 마흐-젠더 간섭계, 지연간섭계, 반도체 광증폭기, 도파로, 위상조절수단 | ||||||
| 87 | 반도체 광증폭기를 이용한 전광 ＯＲ 논리소자의 구현장치 | KR1020010059367 | 2001-09-25 | KR1020030028674A | 2003-04-10 | 변영태; 전영민; 김재헌; 이석; 우덕하; 김선호; 김광남 |
| PURPOSE: An apparatus for realizing an electric light OR logic element using a semiconductor optical amplifier is provided to realize the electric light OR logic element by using gain saturation and wavelength conversions characteristics. CONSTITUTION: A pulse generator(100) generates light pulses. An MLFL(Mode Locked Fiber Laser)(102) generates input signal patterns A and B of an electric light OR logic element from the pulse generator. A first FC(Fiber Combiner)(106) divides output light of the MLFL at a ratio of 50 to 50 through an optical isolator(104). A first optical delay obtains time delay of the output light from the first FC through a variable delay(108) and an SMF(Single-Mode Fiber)(110). A first optical controller controls the strength and polarization of the output light of the first FC through an attenuator(112) and a polarization controller(114). A second FC(116) combines the output light of the first optical delay and the first optical controller for generating the input signal pattern A. A third FC(118) divides the output light of the second FC at a ratio of 10 to 90. A second optical delay obtains time delay of the output light from the second FC through a variable delay(120) and an SMF(122). A fourth FC(124) detects the input signal pattern B generated from the second optical delay. A second optical controller controls the strength and polarization of the output light of the third FC through an attenuator(126) and a polarization controller(128). A fifth FC(130) combines the input signal patterns A and B for generating an input signal pattern A+B. An optical detecting and measuring element detects and measures the input signal pattern A+B. | ||||||
| 88 | SELF-TUNED SILICON-PHOTONIC WDM TRANSMITTER | US15346565 | 2016-11-08 | US20180231808A1 | 2018-08-16 | Xuezhe Zheng; Ying Luo; Ashok V. Krishnamoorthy |
| An optical transmitter includes: a set of reflective silicon optical amplifiers (RSOAs), a set of ring modulators, a shared broadband reflector, a set of intermediate waveguides, and a shared waveguide. Each intermediate waveguide channels light from an RSOA in proximity to an associated ring modulator to cause optically coupled light to circulate in the associated ring modulator. The shared waveguide is coupled to the shared broadband reflector, and passes in proximity to the set of ring modulators, so that light circulating in each ring modulator causes optically coupled light to flow in the shared optical waveguide. During operation, each RSOA forms a lasing cavity with the shared broadband reflector, wherein each lasing cavity has a different wavelength, which is determined by a resonance of the associated ring modulator. The different wavelengths are combined in the shared waveguide to produce a combined output. | ||||||
| 89 | THREE PORT TRANSCEIVER | US15212693 | 2016-07-18 | US20160327738A1 | 2016-11-10 | Christopher Doerr; Benny Mikkelsen; Eric Swanson |
| An optical coherent transceiver comprising a polarization and phase-diversity coherent receiver and a polarization and phase-diversity modulator on the same substrate interfaced by three grating couplers, on grating coupler coupling in a signal, one grating coupler coupling in a laser signal, and a third grating coupler coupling out a modulated signal. | ||||||
| 90 | THREE PORT TRANSCEIVER | US14921532 | 2015-10-23 | US20160041336A1 | 2016-02-11 | Christopher Doerr; Benny Mikkelsen; Eric Swanson |
| An optical coherent transceiver comprising a polarization and phase-diversity coherent receiver and a polarization and phase-diversity modulator on the same substrate interfaced by three grating couplers, on grating coupler coupling in a signal, one grating coupler coupling in a laser signal, and a third grating coupler coupling out a modulated signal. | ||||||
| 91 | Optical switch using a michelson interferometer | US12818534 | 2010-06-18 | US08917960B2 | 2014-12-23 | Paul Prucnal |
| An optical switch using a Michelson interferometer and differential onset of optical nonlinearity. Modulation of optical signals can occur at speeds that exceed that of electronic devices. | ||||||
| 92 | Optical digital-to-analog converstion | US13201693 | 2009-02-16 | US08842028B2 | 2014-09-23 | Claudio Porzi; Antonella Bogoni; Luca Poti |
| The present invention relates to Digital-to-Analog conversion in the optical or photonic domain. The present invention provides a digital-to-analog converter (DAC) (100) arranged to receive an N-bit digital optical signal (105) and to process the N-bit digital optical signal to generate an analog optical signal (110). The DAC comprises a photonic circuit (120a, 120b) arranged to adjust the amplitude of each bit of the N-bit digital optical signal dependent on the amplitudes of at least one of the other bits of the N-bit digital optical signal. The amplitudes are adjusted using a non-linear optical effect in order to generate respective outputs for each bit. The DAC also comprises a photonic combiner (145) arranged to combine the outputs for each bit to generate the analog output signal (110). | ||||||
| 93 | OPTICAL MODULATOR | US13634324 | 2011-02-22 | US20130004175A1 | 2013-01-03 | Tiago Silveira; Ana Ferreira |
| An optical modulator and a method for operating the optical modulator are provided, the optical modulator contains at least two semiconductor optical amplifier sections that are arranged in a cascaded structure. An information signal is applicable to one of the semiconductor optical amplifier sections and an inverse information signal is applicable to another of the semiconductor optical amplifier sections. In addition, a communication system containing at least one such modulator is suggested. | ||||||
| 94 | OPTICAL ANALOGUE TO DIGITAL CONVERTER | US13127085 | 2008-10-31 | US20110234436A1 | 2011-09-29 | Antonella Bogoni; Francesco Fresi; Emma Lazzeri; Mirco Scaffardi; Luca Poti |
| An analogue to digital converter (100) is arranged to receive and process an analogue optical input signal (110) to produce an N bit digital optical output signal (140) quantised to 2N levels, where N is greater than or equal to 2. The converter (100) has an input (115) for receiving the optical input signal (110) and N processing channels (131, 132, 133) which arc each coupled to the input, at least one of said processing channels comprising an optical processing circuit (201, 202, 203, 204, 205, 206, 207) arranged to generate a plurality of digital optical output signals. The optical processing circuit is arranged to change the state of each digital optical output signal corresponding to a respective different value of the analogue optical input signal, and an optical combining circuit (301, 302, 303, 304) for combining the optical output signals in signal order to generate one bit of the N-bit digital optical signal. | ||||||
| 95 | Synchronous OTDM: gapped clock creation and duty cycle multiplication | US10442876 | 2003-05-21 | US08000605B2 | 2011-08-16 | Bharat Dave |
| Methods and apparatus for implementing synchronous Optical Time Division Multiplexing are presented. Namely, a method of upconverting and combining N input NRZ optical data signals, each having an approximately equal pulse width and period, into one time-division multiplexed output signal, as well as a method for the inverse, i.e., down converting the N demultiplexed component signals are presented. Apparatus to implement these functionalities is also presented. | ||||||
| 96 | OPTICAL SWITCH USING A MICHELSON INTERFEROMETER | US12818534 | 2010-06-18 | US20100321769A1 | 2010-12-23 | PAUL PRUCNAL |
| An optical switch using a Michelson interferometer and differential onset of optical nonlinearity. Modulation of optical signals can occur at speeds that exceed that of electronic devices. | ||||||
| 97 | DIRECTLY MODULATED SPATIAL LIGHT MODULATOR | US12818543 | 2010-06-18 | US20100321759A1 | 2010-12-23 | PAUL PRUCNAL; GLENN A. GLADNEY |
| A directly modulated spatial light modulator (DM-SLM) may be formed using a semiconductor optical amplifier. The directly modulated spatial light modulator may also be formed with a vertical cavity surface emitting laser having an output side; and an anti-reflection coating located on the output side. | ||||||
| 98 | Devices and methods for all-optical processing and storage | US12346629 | 2008-12-30 | US07805049B2 | 2010-09-28 | Doron Handelman |
| Device and methods for optical processing and storage are described. In a preferred embodiment, an integrated optical gate matrix, that includes a set of nonlinear elements and waveguides interconnecting at least some nonlinear elements in the set of nonlinear elements, may be configured to enable optical processing. A first subset of the set of nonlinear elements is preferably configured to function as a set of ON/OFF switches in the “OFF” state to enable a second subset of the set of nonlinear elements to be configured in at least one optical processing configuration. Configuration of the second subset of the set of nonlinear elements may be used for various optical processing operations, such as all-optical 2R or 3R regeneration, wavelength conversion, data format conversion, demultiplexing, clock recovery, logic operations and dispersion compensation. Related apparatus and methods are also described. | ||||||
| 99 | OPTICAL SIGNAL PROCESSING DEVICE AND METHOD OF PROCESSING OPTICAL SIGNAL | US12639964 | 2009-12-16 | US20100220997A1 | 2010-09-02 | Fumio FUTAMI |
| An optical signal processing device for shaping a waveform of an optical signal, including: an intensity inversion wavelength converter configured to generate an intensity-modulated optical signal of a second wavelength obtained by inverting a signal intensity of an input intensity-modulated optical signal of a first wavelength; an optical coupler configured to multiplex the intensity-modulated optical signal of the first wavelength and the intensity-modulated optical signal of the second wavelength at a timing at which signal intensities of those signals become opposite; and an optical limiter configured to input coupled light output from the optical coupler, and suppress gain as power of the coupled light becomes higher. | ||||||
| 100 | Three-terminal optical signal amplifying device | US12458357 | 2009-07-09 | US20090279165A1 | 2009-11-12 | Yoshinobu Maeda |
| In the three-terminal optical signal amplifying device 10, a portion of the neighboring light LS at other wavelength than that of the first wavelength λ1 that is selected from the output light from the element 14 by the optical add drop filter 16, and the control light LC at the second wavelength λ2 input from the external are together input to the second semiconductor optical amplifying element 18. The output light including the output signal light LOUT at the second wavelength λ2 and the neighboring light at the neighboring wavelength to the second wavelength λ2 that is modulated and controlled by the control light LC in the cross gain modulation is output from the second semiconductor optical amplifying element 18. And the output signal light LOUT at the second wavelength λ2 passes through the wavelength selecting filter 20. | ||||||
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