| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 121 | 光アナログ／デジタル変換器、その構成方法、光信号復調器及び光変復調装置 | JP2012515726 | 2011-04-28 | JPWO2011145281A1 | 2013-07-22 | 信也 須藤; 佐藤 健二; 健二 佐藤 |
| 本発明に係る光A/D変換器は、アナログ入力信号光を複数に分割する光分波器(2)と、光分波器(2)により分割された各信号光が入力される複数のマッハ・ツェンダー型光干渉計(4)と、各マッハ・ツェンダー型光干渉計(4)から出力された各信号光をデジタル電気信号に変換する複数の光/電気変換手段(9)と、を備え、各マッハ・ツェンダー型光干渉計(4)は、入力信号光の強度を位相シフト量に光学的に変換する光強度位相変換手段(25〜28)を備え、位相シフト量が、マッハ・ツェンダー型光干渉計(4)毎に異なるものである。これにより、高速かつ低消費電力な光復調回路を提供することができる。 | ||||||
| 122 | Wavelength selection interleaved filtering technology (swift) adc of the system and method | JP2012531053 | 2010-09-24 | JP2013519245A | 2013-05-23 | ウッドワード テッド; バンウェル トム; アガーワル アンジャリ; トリバー ポール; マーティン キャロル |
| アナログデジタル変換（ＡＤＣ）用の波長選択インタリーブフィルタリング技術向けのシステムおよび方法は、アナログ入力用のリモートアパーチャと、アナログ入力を当初の光信号に変換するように動作可能な変調器と、光信号を、複数の後続の光信号へとフィルタリングして、電気信号へダウンコンバートするために局部発振器に送信するように動作可能な高分解能の光フィルタを有するフォトニックフロントエンドと、それぞれが、諸光信号の１つの後続の光信号を受信して変換するように動作可能な複数のＡＤＣを有する区分化されたサブシステムと、変換された後続の光信号を、再構成アルゴリズムを実行することにより、アナログ入力のデジタル表現へと再構成するように動作可能なメモリバッファおよび処理サブシステムとを備える。 電気信号を光信号に変換して再度電気信号に変換する処理で生じる歪みの補償が提供される。 光フィルタは、自己記録されたフィルタを含むことができ、個々の通過帯域が本質的に互いに整列する。 | ||||||
| 123 | Digital - analog converter | JP2012513880 | 2010-06-11 | JP2012529660A | 2012-11-22 | ハン リー，ジュ |
| A digital-to-analog converter (DAC) includes multiple electro-optical converters to generate multiple first optical signals in response to multiple input signals, multiple optical attenuators to attenuate intensities of the first optical signals and to generate multiple second optical signals, an optical coupler to combine the second optical signals and to generate a third optical signal, and a photodetector to convert the third optical signal into an electrical analog signal. | ||||||
| 124 | A / d conversion method and apparatus | JP2001517210 | 2000-08-10 | JP4607401B2 | 2011-01-05 | アーバン ウェスターグレン，; ラルス ティレン，; スベーカー ホード，; メーラン モクタリ， |
| 125 | Optical signal processing device | JP2000064364 | 2000-03-09 | JP3527455B2 | 2004-05-17 | 勝就 岡本; 隆志 才田; 浩一 瀧口 |
| 126 | Method of holding an optical hold device and an optical input pulse | JP22729299 | 1999-08-11 | JP3522600B2 | 2004-04-26 | エリザベス・ティー・カンキー; エリック・エル・アプトン; スティーヴン・アール・パーキンズ; デイヴィッド・エル・ロリンズ; ブルース・エイ・ファーガソン; マーク・キンティス; リチャード・エイ・フィールズ; ローレンス・ジェイ・レムボ |
| 127 | Iteration absorption threshold Holding optical quantizer | JP2000193751 | 2000-06-28 | JP3481562B2 | 2003-12-22 | エリザベス・ティー・クンキー; エリック・エル・アプトン; ジュアン・シー・カリロ，ジュニアー; スティーヴン・アール・パーキンズ; デイヴィッド・エル・ロリンズ; ブルース・エイ・ファーガソン; マーク・キンティス; リチャード・エイ・フィールズ; ローレンス・ジェイ・レムボ |
| 128 | Optical a / d-converting apparatus and method | JP22726599 | 1999-08-11 | JP3197538B2 | 2001-08-13 | エリザベス・ティー・カンキー; エリック・エル・アプトン; ジュアン・シー・カリロ，ジュニアー; スティーヴン・アール・パーキンズ; デイヴィッド・エル・ロリンズ; マーク・キンティス; リチャード・エイ・フィールズ; ローレンス・ジェイ・レムボ |
| 129 | Optical a/d converter | JP2000192116 | 2000-06-27 | JP2001051314A | 2001-02-23 | JUAN C CARILO JR; FERGUSON BRUCE A; RICHARD A FIELDS; MARK KINTIS; KUNKEE ELIZABETH T; LEMBO LAWRENCE J; STEVEN R PARKINS; DAVID L ROLLINS; UPTON ERIC L |
| PROBLEM TO BE SOLVED: To provide an optical A/D converter using a system of downward folding successive approximation by light subtraction. SOLUTION: A light signal 20 is inputted to converter channels 12 to 18, and the threshold value and light intensity are compared in threshold devices 24, 40, 60, 80. Switches 30, 46 and 64 are subjected to on/off control in accordance with the result thereof. The lasers from control lasers 32, 48 and 68 are supplied by on/off of the switches to control terminals of subtraction elements 38, 56, 58, 74, 76 and 78. Whether the subtraction is executed or not in the respective subtraction elements is controlled. The threshold values of the respective threshold devices are successively decreased to a half. As a result, the A/D conversion of the light signal by the system of downward folding successive approximation is made possible. The subtraction elements are saturable absorbers or electroabsorption modules. | ||||||
| 130 | Optical a/d converter and method | JP22654999 | 1999-08-10 | JP2000089272A | 2000-03-31 | RICHARD A FIELDS; DAVID L ROLLINS; STEVEN R PARKINS; UPTON ERIC L; ELIZABETH T CANKEY; LEMBO LAWRENCE J; JUAN C CARILO JR; MARK KINTIS |
| PROBLEM TO BE SOLVED: To optically perform an A/D conversion by using a downward-folding successive approximation approach. SOLUTION: In a modulator 30, an optical carrier signal from a laser 28 is frequency modulated by an analog signal 24 to be divided into two signals in the splitter of a stage 12. In filters 16, 18, a signal is outputted from either of them is accordance with frequencies of signals from the splitter. When frequencies of the signal enter into the passband of a filter 16, the signals are outputted to an adder 22 as they are and when the frequencies of the signal enter into the epasband of a filter 18, the signals are down-shifted in a frequency-down shifter 20 to be inputted to an addrer 22 and generates the first bit signal MSB1 of a digital signal is generated. Frequencies are successively lowered in subsequent states 46, 48, 50 and bit signals MSB2, MSB3, MSBn are generated in accordance with in which ranges frequencies of an input 36 enter and, finally, this converter outputs a digital signal whose bits are composed of these bit signals MSB1, MSB2, MSB3, MSBn. | ||||||
| 131 | Optical analog-digital conversion device | JP5906192 | 1992-02-12 | JPH08179392A | 1996-07-12 | YAO RII; YAN CHIYAN |
| PURPOSE: To provide an optical analog-digital conversion device having the capability of being utilized for a fast processing application, as well as having high reliability. CONSTITUTION: This optical analog-digital conversion device 1 has a signal voltage source 12 for sending out an input voltage signal of an analog value Vm to a deflecting system driver 14. Then, the driver 14 generates a high-frequency signal having a frequency corresponding to the analog voltage value Vm and inputs the signal to an acoustopic deflecting system 10. This system 10 deflects a light beam from a light generator I5 at such a deflection angle as corresponding the frequency of the high-frequency signal, and converges the light on a mask 18. In this ease, the mask 18 has 'N' rows of a picture element array, and outputs 'N' types of mask light signals respectively corresponding to 'N' picture element rows. Furthermore. an 'N'-channel photodetector array 20 detects the 'N' types of the mask light signals and coverts the signals into voltage signals, thereby outputting digital signals of 'N' bits corresponding to the analog voltage value Vm. COPYRIGHT: (C)1996,JPO | ||||||
| 132 | Light a / d converter | JP14304483 | 1983-08-03 | JPH0616145B2 | 1994-03-02 | SERIZAWA AKIMOTO |
| 133 | Optical a/d converter | JP18484491 | 1991-07-24 | JPH0527290A | 1993-02-05 | KONDO HIROSHI; SATO SHIRO |
| PURPOSE:To concrete a neural network type optical A/D converter which is conventionally known only as a model and has no initial value dependence as an optical A/D converter. CONSTITUTION:A feedback system consists of an optical arithmetic means 1 and a comparator device 2 and this feedback system performs the arithmetic of the right-hand member of an arithmetical equation Ui=[(SIGMAWijj+Hi)V+A]Si, where is 0 when i>j>=0 or -2**(**j: raised to (j)th power) when j>i<=0, hi -2 **i or -[(2**i)-epsilon)(¦epsilon¦<=1), V and Si are optional plus number, and the sum the lst term of the right-hand member is 0-n-1 as to (j). In this arithmetic process, the optical arithmetic means 1 performs the optical arithmetic of at least [(SIGMAWijXi)V]Si and the comparator device 2 performs specific threshold processing for the left-hand member of the arithmetical equation. | ||||||
| 134 | JPH0435732B2 - | JP6719780 | 1980-05-22 | JPH0435732B2 | 1992-06-12 | JAN KUROODO ANNU; MISHERU HOOSHON; KUROODO PUUSHU |
| 135 | Hikaridahenkansoshi | JP21243781 | 1981-12-29 | JPH0233128B2 | 1990-07-25 | INOE NAOHISA; MORI KAZUHIKO; MATANO MASAHARU; YAMASHITA MAKI |
| 136 | JPH0159607B2 - | JP11832382 | 1982-07-07 | JPH0159607B2 | 1989-12-19 | DEIITAA SHUETSUKAA; ETSUKEHARUTO KUREMENTO |
| 137 | Optical da converting element | JP21243781 | 1981-12-29 | JPS58116522A | 1983-07-11 | INOUE NAOHISA; MORI KAZUHIKO; MATANO MASAHARU; YAMASHITA MAKI |
| PURPOSE:To perform optical D/A conversion by diffracting parallel light beams which propagate in a light guide successively by a surface acoustic wave and then diffracting them successively by the 2nd surface acoustic wave in the opposite direction, and integrating the weighted light beams through a photodetector. CONSTITUTION:Parallel light beams P0-P7 introduced through a photocoupling part 23 into the light guide 12 on an LiNbO3 substrate 11 are deflected by being diffracted successively in the order of the light beams P7-P0 by a surface acoustic wave SAW1 propagating from a comb-shaped ultrasonic oscillator (IDT)21, and then deflected in a direction C by a surface acoustic wave SAW2 generated by an IDT22. Since corresponding distances lb0-lb7 of the SAW2 are set larger than distances la0-la7 from the IDT21 to respective diffraction points of the SAW1, the light beams P0-P7 traveling in a direction B before being diffracted by the SAW2 are inputted through the photocoupling part 24 to the photodetector 26 with digital loads increasing in said order to perform integration 27, thereby obtaining an analog value. | ||||||
| 138 | Optical calculator | JP11832382 | 1982-07-07 | JPS5816348A | 1983-01-31 | DEIITAA SHIYUETSUKAA; ETSUKEHARUTO KUREMENTO |
| 139 | Optical analog-to-digital converter | JP3564281 | 1981-03-11 | JPS57148725A | 1982-09-14 | TSUJII KOUICHI |
| PURPOSE:To improve the accuracy of an optical A/D converter, by varying the scanning cycle according to the output of a 1-dimensional photodetecting array to which the divided beams are supplied. CONSTITUTION:The divided beams are supplied to a CCD which functions as a 1-dimentional photodetecting array. Then a common power supply 11 of the CCD is connected to a positive power supply, and a common output terminal 12 is connected to an arithmetic amplifier 15. The output of the amplifier 15 is averaged by a smoothing circuit 17 to obtain the voltage corresponding to the mean value of the light volume irradiated to each phototransistor 8. This voltage is supplied to a voltage control oscillator 18 to obtain a pulse signal of a frequency corresponding to the voltage. This signal is used as a scan signal to be supplied to a control signal terminal 14 of a shift register. In such way, the scanning cycle is controlled according to the output of the CCD to increase the accuracy of an optical A/D converter. | ||||||
| 140 | Optical da converter | JP6032680 | 1980-05-06 | JPS56155928A | 1981-12-02 | FUJINO JIYUNICHI; MIZUTANI YOSHIKI; MIYAZAKI HIDETO |
| PURPOSE:To decrease the number of parts by simplifying constitution by arranging a half-mirror and total reflective mirror in parallel and at a prescribed interval, and by providing beam transmitters at equal intervals. CONSTITUTION:Half-mirror and reflective mirror 16 and 17 are arranged in parallel and at prescribed interval (t), and optical fibers 1-4 radiating digital light beams a1-a4 are held at prescribed angle theta deg. to the mirror surface and arranged at equal intervals (d). Digital light beams a1-a4 are incident to half-mirror 16 and totally reflected by total reflective mirror 17; light beam a1 is passed through and reflected by half-mirror 16 repeated four times to obtain output (b), which has 1/16 light intensity. Similarly, light beams a2, a3 and a4 are reduced to 1/8, 1/4 and 1/2, respectively. Then, the intensity of light beams a1-a4 are added together to obtain analog light signal (b) which corresponds to digital beams a1-a4. This constitution is simplified and decreases the number of parts even if the number of bits is large. | ||||||
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