JPS60256124A - Optical series-parallel converter - Google Patents
Optical series-parallel converterInfo
- Publication number
- JPS60256124A JPS60256124A JP59112649A JP11264984A JPS60256124A JP S60256124 A JPS60256124 A JP S60256124A JP 59112649 A JP59112649 A JP 59112649A JP 11264984 A JP11264984 A JP 11264984A JP S60256124 A JPS60256124 A JP S60256124A
- Authority
- JP
- Japan
- Prior art keywords
- optical
- waveguide
- parallel
- signal
- bit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F3/00—Optical logic elements; Optical bistable devices
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/29—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the position or the direction of light beams, i.e. deflection
- G02F1/31—Digital deflection, i.e. optical switching
- G02F1/313—Digital deflection, i.e. optical switching in an optical waveguide structure
- G02F1/3132—Digital deflection, i.e. optical switching in an optical waveguide structure of directional coupler type
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Communication System (AREA)
Abstract
Description
【発明の詳細な説明】
（技術分野）
本発明は光面並列変換器、とくに光ファイバ等金介して
直列ビットの形成で伝送されたレーザ光信号全並列ビッ
トの形式に変換し、−また逆に、並列ビットの形式で伝
送されたレーザ光信号ｋｒｆ列ビ、トの形式のレーザ光
信号に変換するための光面並列変換器に関する。DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention is an optical surface parallel converter, in particular for converting a laser light signal transmitted in the form of serial bits through a metal, such as an optical fiber, into the form of fully parallel bits - and vice versa. The present invention relates to an optical surface parallel converter for converting a laser light signal transmitted in the form of parallel bits into a laser light signal in the form of KRF string bits.
（従来技術） この種変換器は、従来においては、第１図（Ａ）。(Conventional technology) This type of converter is conventionally shown in FIG. 1(A).
ｆＢ）に示すように、いったん電気信号の形で情報をｔ
貯えておく手段が必要である。As shown in fB), once information is transmitted in the form of an electrical signal t
You need a way to store it.
すなわち、ビット直列に伝送される光悟号全ビット並列
信号に変換するためには、第１図ｉＡ）にボすように、
光フアイバ１等から伝送された光信号を受光素子２′を
用いて光−電気変換によりｌ電気信号に変換した後、こ
れ＝ｉＮ段のシフトレジスタ３′に入力し、Ｎ個のビッ
トがシフトレジスタ３′にシフトインされたとき、シフ
トレジスタ３′の各段の出力を並列に出力レジスタ４′
にラッチする。こうして、シフトレジスタ３′にＮ個の
ビットをシフトインするごとに１回ずつ出力レジスタ４
′全イネーブルしてラッチし、これによりＮビ、トの並
列信号金得ることができる。In other words, in order to convert all bits of Kogogo to parallel signals that are transmitted in bit series, as shown in Figure 1 iA),
After converting the optical signal transmitted from the optical fiber 1, etc. into an electrical signal by optical-to-electrical conversion using the light receiving element 2', this signal is input to the shift register 3' of iN stages, and N bits are shifted. When shifted into the register 3', the outputs of each stage of the shift register 3' are output in parallel to the output register 4'.
Latch to. In this way, each time N bits are shifted into the shift register 3', the output register 4
'All enabled and latched, this allows N bits of parallel signals to be obtained.
同様に並列１百号を直列光信号に変換するには。Similarly, to convert parallel 100 signals to serial optical signals.
第１図＋０＋に示すように、並列Ｎビットの形で伝送さ
れた信号をいったん入力レジスタ５′にラッチし、これ
（ｉ−、Ｎ段のシフトレジスタ６′の各段に並列にセッ
トし、シフトアウトされた電気信号全発光素子７′に加
え、電気光学効果して光信号にｉｆｆる。シフトレジス
タ６′にセットされたＮ個の直列ビットはＮ倍のクロッ
クレイトのクロック金柑いて直列にレフトアウトされ、
かくして。As shown in FIG. 1 +0+, the signal transmitted in the form of N bits in parallel is once latched into the input register 5', and then set in parallel in each stage of the N-stage shift register 6'. In addition to the electric signal shifted out to all the light-emitting elements 7', the electro-optical effect is applied to the optical signal. left out,
Thus.
Ｎビットの並列信号を、ビットａ列の光信号に変換した
出力金得ることができる。An output signal can be obtained by converting an N-bit parallel signal into an optical signal of a column of bits.
上述のように従来例においては、いずれの場合にも、情
報をいったん電気信号に変換した後、これを貯えておく
手段が必要である。従って光信号間では並列変換全行な
う場合には上述のようにして得られたそれぞれの電気信
号を再び光信号に変換しなおす手段が必要である。As described above, in any case, in the conventional example, a means is required to store the information after it has been converted into an electrical signal. Therefore, when performing parallel conversion between optical signals, a means is required to convert each electrical signal obtained as described above back into an optical signal.
（発明の目的）
本発明の目的は上述の従来の迂遠な手段を用いることな
く光信号の山並列変換全光信号のままで行なう光直並列
変換器金提供することにある。(Object of the Invention) An object of the present invention is to provide an optical serial-to-parallel converter that performs serial-to-parallel conversion of optical signals without using the conventional circuitous means described above.
（発明の構成）
本発明の変換器は、電気光学効果金有する基板上に設け
られた第１の一つの光導波路と、それぞれが前記第１の
光導波路と光学的に結合する一つの結合部分金有する前
記基板上に設けられた第２の複数の光導波路と、前記結
合部分に電界を加え前記結合部分の光結合係数を制御す
る制御手段と全備え、前記結合部分の間隔が前記第１の
光導波路に伝送きれるディジタル光信号のほば一ビット
間隔分に配置され、前記第１の光導波路にビンｌ−直列
に伝送される光ティジタル信号金前ｄ己手段によりビッ
ト並列に前記第２の光導波路に分岐し、または前記第２
の光導波路にビット並列に伝送される光デイジタル信号
全前記第１の光導波路にビ、トＴＫ列に伝送される信号
として合成できる。(Structure of the Invention) The converter of the present invention includes a first optical waveguide provided on a substrate having an electro-optic effect, and a coupling portion each optically coupled to the first optical waveguide. a second plurality of optical waveguides provided on the substrate including a metal, a control means for applying an electric field to the coupling portion and controlling an optical coupling coefficient of the coupling portion; The digital optical signals that can be transmitted to the optical waveguide are arranged at approximately one bit interval, and are transmitted in series to the first optical waveguide. branch into an optical waveguide, or the second optical waveguide.
All of the optical digital signals transmitted bit-parallel to the first optical waveguide can be synthesized as signals transmitted to the first optical waveguide in bits, bits, and TK columns.
（実施例） 次に図面を参照して本発明の詳細な説明する。(Example) Next, the present invention will be described in detail with reference to the drawings.
第２図は本発明の一実施例金示す構成図である。FIG. 2 is a block diagram showing one embodiment of the present invention.
本実施例は、電気光学効果等を有する基板１上に構成し
た光信号導波路２およびＮ個の光分岐導波路３−１．３
−２・・・・・、３−Ｎ７ｉ−含み、このＮ個の導波路
３−１〜３−Ｎは、それぞれ前記導波路２に光学的に結
合する一つの結合部分４−１〜４−Ｎを有している。In this embodiment, an optical signal waveguide 2 and N optical branching waveguides 3-1.3 are constructed on a substrate 1 having an electro-optic effect.
-2..., 3-N7i-, and each of the N waveguides 3-1 to 3-N is one coupling portion 4-1 to 4- that optically couples to the waveguide 2. It has N.
さらに第３図に示すように、４波路２と導波路３との間
の基板部分に電界を加え、前記結合部分４−１〜４−Ｈ
の光結合係数を制御するための電極５Ａ、５Ｂ、５０を
有している。Further, as shown in FIG. 3, an electric field is applied to the substrate portion between the four waveguides 2 and the waveguide 3, and
It has electrodes 5A, 5B, and 50 for controlling the optical coupling coefficient of.
さて本実施例の動作は下記の通りである。Now, the operation of this embodiment is as follows.
最初にピット医列信号からビット並列信号への変換全説
明する。First, the entire conversion from a pit parallel signal to a bit parallel signal will be explained.
入力光信号は、第２図の光導波路２を左方から５−
右方に向って進行する１”、０″で変調されたディジタ
ル信号であり、このビット周期ｆｉ’とすると、この光
信号は導波路２内において、ｖＴの長さのビット間隔を
もつディジタル光信号として伝送される。但しＶは導波
路２内における光信号の群速度である。The input optical signal is a digital signal modulated with 1'' and 0'' that travels from the left to the right in the optical waveguide 2 in FIG. is transmitted in the waveguide 2 as a digital optical signal with a bit interval of length vT. However, V is the group velocity of the optical signal within the waveguide 2.
本実施例においては、４波路２と導波路３とを結合する
。前記Ｎ個の結合部分４−１〜４−Ｎは導波路２に対し
て、はぼこのＶＴの長さの間隔金もって配置されている
。この結合部分に電界が加わらない状態においては、導
波路２と、谷導波路３−１〜３−Ｎとの光結合係数は無
視できる程度に小さいが、前述の電極５Ａ、５Ｂ、５Ｃ
に特定の電圧を与え、これにより生ずる電界が基板１の
結合部４−１〜４−Ｎに き起す誘ｗ率の変化を用いて
、導波路２と、各導波路３−１〜３−Ｎとの光結合係数
を高めるようにすることができる。In this embodiment, four wave paths 2 and a waveguide 3 are coupled. The N coupling portions 4-1 to 4-N are arranged with respect to the waveguide 2 at intervals equal to the length of the hollow VT. When no electric field is applied to this coupling portion, the optical coupling coefficient between the waveguide 2 and the valley waveguides 3-1 to 3-N is negligibly small, but the above-mentioned electrodes 5A, 5B, 5C
A specific voltage is applied to the waveguide 2 and each of the waveguides 3-1 to 3-N using the change in permittivity caused by the electric field generated in the coupling portions 4-1 to 4-N of the substrate 1. The optical coupling coefficient with N can be increased.
かくして、導波路２側に伝送される光信号の導波路３側
への分岐を制御することが可能となる。In this way, it becomes possible to control branching of the optical signal transmitted to the waveguide 2 side to the waveguide 3 side.
さて１分電極５Ａ、５Ｂ、５Ａに加えるべき電６−
圧波形を、第４図に示すように、各々のパルス幅をほぼ
Ｔとし、その繰返し周期をＮＴとして、これを導波路２
内に伝送される光デイジタル信号との間で同期をとり、
各結合部分４−１〜４−Ｈに対し、特定の位相で同時に
加わるように制御することによって導波路２に伝送され
る光信号はＮビットずつ並列に導波路３−１〜３−Ｎ側
に分岐されることは明らかである。Now, as shown in Fig. 4, the voltage waveform to be applied to the electrodes 5A, 5B, and 5A for one minute is set to approximately T with a pulse width of T and a repetition period of NT, and is applied to the waveguide 2.
synchronizes with the optical digital signal transmitted within the
By controlling the coupling parts 4-1 to 4-H so that they are applied simultaneously at a specific phase, the optical signals transmitted to the waveguide 2 are transmitted in parallel N bits each to the waveguides 3-1 to 3-N. It is clear that there are two branches.
こうして直列ビット光信号＝ｉＮビットの並列ビット光
信号に変換することができる。In this way, the serial bit optical signal can be converted into a parallel bit optical signal of iN bits.
次に並列光信号から並列光信号への変換について説明す
る。Next, conversion from parallel optical signals to parallel optical signals will be explained.
入力のＮビットの並列光信号は、Ｎ個の導波路３−１〜
３−Ｎを導波路２との結合部４−１〜４−Ｎに向って伝
送される。これら並列ビットの光信号は、各導波路ごと
に同じビット周期ＮＴをもち、相互に同期されている。The input N-bit parallel optical signal is transmitted through N waveguides 3-1 to 3-1.
3-N is transmitted toward the coupling portions 4-1 to 4-N with the waveguide 2. These parallel bit optical signals have the same bit period NT for each waveguide and are mutually synchronized.
さて、前述の電極５Ａ、５Ｂ、５Ｃに第４図に示すよう
な周期ＮＴ、パルス幅約Ｔの電圧波形を、導波路３に伝
送される光信号に同期して適当な位相で加えることによ
り、前述のように、この電圧パルスが加わっている間だ
け、４波路３−１〜３−Ｎと導波路２とが実質的に光結
合され、この結果、並列に伝送された入力光信号の各ビ
ットは。Now, by applying a voltage waveform with a period NT and a pulse width of approximately T as shown in FIG. 4 to the aforementioned electrodes 5A, 5B, and 5C in synchronization with the optical signal transmitted to the waveguide 3 and with an appropriate phase. , as mentioned above, only while this voltage pulse is applied, the four waveguides 3-1 to 3-N and the waveguide 2 are substantially optically coupled, and as a result, the input optical signals transmitted in parallel are Each bit is.
導波路２の中のＶＴずつ離れた位置にそれぞれ入力され
、かくして導波路２の中で周期Ｔのビット直列の光信号
として外部に送出される。こうしてＮビットの並列ビッ
トの光信号ｔ−，旧列ビットの光信号に変換することが
できる。The signals are input into the waveguide 2 at positions spaced apart by VT, and are thus sent out as a bit series optical signal with a period T in the waveguide 2. In this way, the optical signal t- of N parallel bits can be converted into an optical signal of old column bits.
以上は本発明の一笑施例を示したもので本発明は以上の
実施例に限定されるものではない。The above is a simple embodiment of the present invention, and the present invention is not limited to the above embodiment.
勿論、■力先信号を並列光信号に変換する専用の直列か
ら並列に変換する変換器として用いることもできるし、
また並列光イ百号全面列光信号に変換する専用の並列か
らは列に変換する変換器として用いることもできる。ま
たは、双方向の変換金許すような直並列変換器として用
いることもできる。Of course, it can also be used as a dedicated series-to-parallel converter that converts the power signal into a parallel optical signal.
It can also be used as a dedicated parallel to column converter for converting into a parallel optical I-100 full-column optical signal. Alternatively, it can be used as a serial-to-parallel converter that allows bidirectional conversion.
また１例えは基板の結合部ＶＣ区界金加えるべき電極は
、各結合部に対して第３図に示したような単純に連結さ
れた電極音用いるかわりに、各結合部ごとに分割し、加
えるべき電圧波形が各結合部に同時に現われるようにす
るために、適当に遅延時間を調整された電圧供給線全弁
して電圧パルスを供給する出力回路に結合するようにす
ることもできる。In addition, for example, the electrodes to be added to the VC area of the bonding portions of the substrate are divided for each bonding portion, instead of using simply connected electrodes as shown in FIG. 3 for each bonding portion. In order to ensure that the voltage waveform to be applied appears simultaneously at each connection, all voltage supply lines with appropriately adjusted delay times can be coupled to an output circuit for supplying voltage pulses.
また、電気光学効果を有する基板としては１例えばリチ
ウム・ナイオベイ）（ＬｉＮｂ０３）等を用いることが
できる。Further, as a substrate having an electro-optic effect, for example, lithium niobay (LiNb03) or the like can be used.
（発明の効果）
以上のように本発明によると、従来例にみるような、光
信号をいったん電気信号に変換してこれを貯えるといっ
た迂遠な方法をとることなく、４波路媒体に貯えられて
いる光エネルギ全利用することによって、光面列ビット
信号ｋｍ接光並列ビット信号に、または光並列ビット信
号を直接光直列ビット信号に変換する光直並列変換器金
提供できる。(Effects of the Invention) As described above, according to the present invention, an optical signal can be stored in a four-wave path medium without taking the roundabout method of converting an optical signal into an electrical signal and storing it, as seen in the conventional example. By making full use of the optical energy present in the optical plane, an optical serial-to-parallel converter can be provided which converts the optical surface array bit signal km into an optical parallel bit signal, or directly converts an optical parallel bit signal into an optical serial bit signal.
これによシ光信号の師並列変換の効率化を達成できる。This makes it possible to improve the efficiency of parallel conversion of optical signals.
９−9-
第１図（Ａ）および第１図（１３）は従来例を説明する
ためのブロック図、第２図および第３図は本発明の一実
施例全説明するための構成図および第４図は前記実施例
に用いられる電圧波形を示す図である。
図において。
１・・・・・・電気光学効果ケ有する基板、２・・・・
光信号導波路、３−１〜３−Ｎ・・・・・光分岐導波路
、４−１〜４−Ｎ・・・・・導波路２と導波路３とを光
学的に結合する結合部分、５Ａ、、５Ｂ、５Ｃ・・前記
結合部分の光結合係数を制御するための電ＩＭ。
１０−1(A) and 1(13) are block diagrams for explaining a conventional example, FIGS. 2 and 3 are block diagrams for explaining an entire embodiment of the present invention, and FIG. 4 is a block diagram for explaining a conventional example. FIG. 3 is a diagram showing voltage waveforms used in the embodiment. In fig. 1...Substrate having electro-optic effect, 2...
Optical signal waveguide, 3-1 to 3-N... Optical branching waveguide, 4-1 to 4-N... Coupling portion that optically couples waveguide 2 and waveguide 3 , 5A, , 5B, 5C... electric IM for controlling the optical coupling coefficient of the coupling portion. 10-
Claims (1)
の光導波路と。 それぞれが前記第１の光導波路と光学的に結合する一つ
の結合部分を有する前記基板上に設けられた第２の複数
の光導波路と。 前記結合部分に電界を加え前記結合部分の光結合係数を
制御する制御手段とを備え、 前記結合部分の間隔が前記第１の光導波路に伝送される
ディジタル光信号のほぼ一ビット間隔分に配置され、前
記第１の光導波路にビット直列に伝送される光デイジタ
ル信号を前記手段によ勺ピット、並列に前記第２の光導
波路に分岐し、または前記第２の光導波路にビット並列
に伝送される光デイジタル信号を前記第１の光導波路に
ビット直列に伝送される信号として合成できるようにし
たことを特徴とする光面並列変換器。[Claims] A first optical waveguide provided on a substrate having an optical effect. a second plurality of optical waveguides provided on the substrate, each having one coupling portion that optically couples with the first optical waveguide; control means for applying an electric field to the coupling part to control an optical coupling coefficient of the coupling part, and the coupling parts are arranged at intervals of approximately one bit interval of the digital optical signal transmitted to the first optical waveguide. and branching the optical digital signal transmitted in bit series to the first optical waveguide into the second optical waveguide in parallel by the means, or transmitting the optical digital signal in bit parallel to the second optical waveguide. 1. An optical surface parallel converter, characterized in that it is capable of synthesizing optical digital signals transmitted to the first optical waveguide as a signal transmitted in bit series to the first optical waveguide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59112649A JPS60256124A (en) | 1984-06-01 | 1984-06-01 | Optical series-parallel converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59112649A JPS60256124A (en) | 1984-06-01 | 1984-06-01 | Optical series-parallel converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60256124A true JPS60256124A (en) | 1985-12-17 |
Family
ID=14592012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59112649A Pending JPS60256124A (en) | 1984-06-01 | 1984-06-01 | Optical series-parallel converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60256124A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01502311A (en) * | 1986-03-04 | 1989-08-10 | クリスチヤン ロブシング エー／エス アフ １９８４ （アルカテル キルク エー／エス） | Method of multiplexing/demultiplexing information and apparatus for carrying out this method |
| WO2007043038A1 (en) * | 2005-10-11 | 2007-04-19 | Yissum Research Development Company Of The Hebrew University Of Jerusalem | Optical routing and transport accelerator (orta) |
-
1984
- 1984-06-01 JP JP59112649A patent/JPS60256124A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01502311A (en) * | 1986-03-04 | 1989-08-10 | クリスチヤン ロブシング エー／エス アフ １９８４ （アルカテル キルク エー／エス） | Method of multiplexing/demultiplexing information and apparatus for carrying out this method |
| WO2007043038A1 (en) * | 2005-10-11 | 2007-04-19 | Yissum Research Development Company Of The Hebrew University Of Jerusalem | Optical routing and transport accelerator (orta) |
| US8588620B2 (en) | 2005-10-11 | 2013-11-19 | Yissum Research Development Company Of The Hebrew University Of Jerusalem | Optical routing and transport acceleration (ORTA) |
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