JPH0365932A - Full optical type optical frequency shifter - Google Patents
Full optical type optical frequency shifterInfo
- Publication number
- JPH0365932A JPH0365932A JP1202664A JP20266489A JPH0365932A JP H0365932 A JPH0365932 A JP H0365932A JP 1202664 A JP1202664 A JP 1202664A JP 20266489 A JP20266489 A JP 20266489A JP H0365932 A JPH0365932 A JP H0365932A
- Authority
- JP
- Japan
- Prior art keywords
- optical
- pulse
- optical fiber
- optical pulse
- signal
- 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.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 38
- 230000010287 polarization Effects 0.000 claims abstract 11
- 239000013307 optical fiber Substances 0.000 claims 11
- 238000006073 displacement reaction Methods 0.000 claims 5
- 230000000694 effects Effects 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract 3
- 230000003111 delayed effect Effects 0.000 abstract 1
Landscapes
- Optical Communication System (AREA)
Abstract
PURPOSE:To increase the distance of ultra short optical pulse transmission without distortion by providing a phase varying means and an optical multiplexing means which multiplexes and inputs an optical pulse for control and signal optical pulses to a nonlinear element while a time difference between the pulses is generated by the phase varying means. CONSTITUTION:A pump optical pulse Pc is delayed through a phase varying device 2 behind the signal optical pulse Ps by a time DELTAtau and made incident on an polarization setting means together with the signal optical pulse Ps passed through a transmission line, etc., and they are set to linear polarized light beams having the same plane of polarization and made incident on an optical multiplexing means 4. The optical multiplexing means 4 multiplexes the signal optical pulse Ps and pump optical pulse Pc and the multiplexed light is made incident on the nonlinear element 5. Then the signal optical pulse is shifted in optical frequency corresponding to set conditions and made incident to and demultiplexed by an optical demultiplexing means 6, so that only the signal optical pulse Ps is outputted as the output light of the optical frequency shifter. Consequently, a desired pulse waveform with small distortion is obtained and the distance of the ultra short optical pulse transmission with small distortion is made long.
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、信号光パルスのチャープの符号と大きさを制
御し、そのキャリア周波数を光入力により任意に変化さ
せる全光型光周波数シフタに関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an all-optical optical frequency shifter that controls the sign and magnitude of chirp of a signal light pulse and arbitrarily changes its carrier frequency by optical input. It is something.
（従来の技術）(Conventional technology)
Claims (6)
光パルスとの間に相対的な時間ずれを生じさせる位相可
変手段と、 該位相可変手段によりパルス間に時間ずれが生じた制御
用光パルスと信号光パルスを合波して前記非線形素子に
入射させる光合波手段とを備えたことを特徴とする全光
型光周波数シフタ。(1) A control light pulse generation source, a nonlinear element having an optical force effect, and a phase that causes a relative time difference between the control light pulse and the signal light pulse generated by the control light pulse generation source. An all-optical device characterized by comprising: a variable means; and an optical multiplexing means for multiplexing a control optical pulse and a signal optical pulse whose pulses are time-shifted by the phase variable means and inputting the signal to the nonlinear element. type optical frequency shifter.
同一の直線偏光となるように設定する偏波設定手段を前
記光合波手段の入力側に配置した請求項（１）記載の全
光型光周波数シフタ。(2) A polarization setting means for setting the control optical pulse and the signal optical pulse so that the polarization directions thereof become linearly polarized light is disposed on the input side of the optical multiplexing means. All-optical optical frequency shifter.
互いに直交する直線偏光となるように設定する偏波設定
手段を前記光合波手段の入力側に配置した請求項（１）
記載の全光型光周波数シフタ。(3) Claim (1) wherein polarization setting means for setting the control light pulse and the signal light pulse to become linearly polarized light whose polarization directions are orthogonal to each other is disposed on the input side of the optical multiplexing means.
The all-optical optical frequency shifter described.
、前記位相可変手段を圧電素子の変位に応じて少なくと
も長さ方向に変位を生じる光ファイバにより構成すると
ともに、前記光合波手段を光ファイバカップラにより構
成した請求項（１）記載の全光型光周波数シフタ。(4) The nonlinear element is constituted by an optical fiber, the phase variable means is constituted by an optical fiber that is displaced at least in the length direction in accordance with the displacement of the piezoelectric element, and the optical multiplexing means is constituted by an optical fiber coupler. An all-optical optical frequency shifter according to claim 1, comprising:
、前記位相可変手段を圧電素子の変位に応じて少なくと
も長さ方向に変位を生じる光ファイバにより構成すると
ともに、前記偏波設定手段を光ファイバ型偏波コントロ
ーラにより構成し、さらに、前記光合波手段を光ファイ
バカップラにより構成した請求項（２）記載の全光型光
周波数フィルタ。(5) The nonlinear element is formed of an optical fiber, the phase variable means is formed of an optical fiber that generates displacement at least in the length direction in accordance with the displacement of the piezoelectric element, and the polarization setting means is formed of an optical fiber. 3. The all-optical optical frequency filter according to claim 2, wherein the optical frequency filter is comprised of a type polarization controller, and the optical multiplexing means is comprised of an optical fiber coupler.
、前記位相可変手段を圧電素子の変位に応じて少なくと
も長さ方向に変位を生じる光ファイバにより構成すると
ともに、前記偏波設定手段を光ファイバ型偏波コントロ
ーラにより構成し、さらに、前記光合波手段を光ファイ
バ型偏波ビームスプリッタにより構成した請求項（３）
記載の全光型光周波数シフタ。(6) The nonlinear element is formed of an optical fiber, the phase variable means is formed of an optical fiber that generates displacement at least in the length direction in accordance with the displacement of the piezoelectric element, and the polarization setting means is formed of an optical fiber. Claim (3), further comprising: a type polarization controller, and further comprising: an optical fiber type polarization beam splitter.
The all-optical optical frequency shifter described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1202664A JP2612938B2 (en) | 1989-08-04 | 1989-08-04 | All-optical type optical frequency shifter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1202664A JP2612938B2 (en) | 1989-08-04 | 1989-08-04 | All-optical type optical frequency shifter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0365932A true JPH0365932A (en) | 1991-03-20 |
| JP2612938B2 JP2612938B2 (en) | 1997-05-21 |
Family
ID=16461103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1202664A Expired - Fee Related JP2612938B2 (en) | 1989-08-04 | 1989-08-04 | All-optical type optical frequency shifter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2612938B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0876151A (en) * | 1994-09-01 | 1996-03-22 | Nippon Telegr & Teleph Corp <Ntt> | Light frequency modulating optical circuit |
| WO2001020396A1 (en) * | 1999-09-14 | 2001-03-22 | Japan Science And Technology Corporation | Ultrawide-band light pulse generator |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01277220A (en) * | 1988-04-28 | 1989-11-07 | Nec Corp | Optical pulse waveform controlling method |
-
1989
- 1989-08-04 JP JP1202664A patent/JP2612938B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01277220A (en) * | 1988-04-28 | 1989-11-07 | Nec Corp | Optical pulse waveform controlling method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0876151A (en) * | 1994-09-01 | 1996-03-22 | Nippon Telegr & Teleph Corp <Ntt> | Light frequency modulating optical circuit |
| WO2001020396A1 (en) * | 1999-09-14 | 2001-03-22 | Japan Science And Technology Corporation | Ultrawide-band light pulse generator |
| US6700905B1 (en) | 1999-09-14 | 2004-03-02 | Japan Science And Technology Corporation | Ultrawide-band light pulse generation |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2612938B2 (en) | 1997-05-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090227 Year of fee payment: 12 |
|
| LAPS | Cancellation because of no payment of annual fees |