WO2001098824A1 - Procede de conversion temps-espace a tres grande vitesse d'un signal optique - Google Patents

Procede de conversion temps-espace a tres grande vitesse d'un signal optique Download PDF

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Publication number
WO2001098824A1
WO2001098824A1 PCT/JP2000/008365 JP0008365W WO0198824A1 WO 2001098824 A1 WO2001098824 A1 WO 2001098824A1 JP 0008365 W JP0008365 W JP 0008365W WO 0198824 A1 WO0198824 A1 WO 0198824A1
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WO
WIPO (PCT)
Prior art keywords
optical signal
time
signal
speed time
space conversion
Prior art date
Application number
PCT/JP2000/008365
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English (en)
Japanese (ja)
Inventor
Kazuhiro Ema
Junko Ishi
Original Assignee
Japan Science And Technology Corporation
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by Japan Science And Technology Corporation filed Critical Japan Science And Technology Corporation
Publication of WO2001098824A1 publication Critical patent/WO2001098824A1/fr

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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
    • 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
    • G02F1/35—Non-linear optics
    • G02F1/353—Frequency conversion, i.e. wherein a light beam is generated with frequency components different from those of the incident light beams
    • G02F1/3536—Four-wave interaction

Definitions

  • the present invention projects an optical signal having a time waveform in the range of picoseconds to sub-picoseconds onto a spatial waveform, thereby obtaining an optical signal necessary for reading an ultra-high-speed optical signal that cannot be measured by an electro-optical element. This is related to the super high speed rush-to-simplification conversion method. Background art
  • the present invention has been made in view of such a situation, and an object of the present invention is to provide an ultra-high-speed time-space conversion of an optical signal capable of efficiently realizing an optical signal conversion at room temperature. It is to provide a method.
  • the response time at room temperature can be reduced by using a material having an organic-inorganic hybrid self-organized quantum well structure as the nonlinear substance. s or less and a Toku ⁇ in that it has a third-order nonlinear susceptibility 1 0- 6 esu or more performance.
  • FIG. 1 is a principle diagram for explaining the principle of the ultra-high-speed time-simplification conversion of the present invention.
  • Figure 2 is a present invention of an optical signal serial -? Ah 3 ⁇ 4 a view showing an example using the parallel conversion 0
  • FIG. 3 is a diagram showing the crystal structure of (C & H i3 NH 3) 2 P 14.
  • Fig. 4 is an experimental layout of serial-to-parallel conversion.
  • FIG. 5 is a diagram showing an example of an experiment result of serial-to-barrel conversion.
  • FIG. 6 is a diagram for evaluating performance corresponding to a signal bucket interval.
  • FIG. 1 is a schematic diagram showing a method for converting an optical signal at a high speed according to the present invention.
  • 1 is a signal light P s
  • 2 is a faceted grating
  • 3 is a lens
  • 4 is a nonlinear material
  • 5 is a readout pulse P R
  • 6 is a self-shaped light.
  • the read pulse P R (5) for performing four-wave mixing has a role of cutting out, its pulse width T ⁇ . Must be shorter than the radiation T of the signal light P s (1). Also, the size of the spatial spread when condensed on the nonlinear material 4 must be larger than the spatial size of the signal light Ps on the nonlinear material 4.
  • T 2 decreases the time resolution of the reading. In order not to cause this reduction, T 2 should be less than the pulse width T r of the read pulse P R.
  • I r (t) is the time waveform of the read pulse
  • I s (t) is a time ⁇ Development of the signal destination. That is, assuming that the time width of the read pulse is Tr , the time transfer form of the signal light is convolved with a width of T, m "2.
  • This time-to-space conversion can be applied to serial-to-parallel conversion of time-division optical digital signals. That is, as shown in FIG. 2, it is possible to sequentially convert a signal bucket having an ultrahigh-speed signal of Tbitss class into a parallel signal for each bucket.
  • the inorganic PbI 6 octahedron spreads two-dimensionally to form a quantum well, and the organic C & H 13 NH 3 forms a barrier sculpture.
  • Some of the wells have large binding energy There are (E fc ⁇ 3 0 Ome V ) exciton, at the wavelength of its exciton resonance, has a% at room temperature ⁇ 3) ⁇ 10- 6 esu major third-order nonlinear susceptibility. Further, since the relaxation time is also 1 7 p T 2 ⁇ 1 ps and short, it is most suitable as a nonlinear material in Me other ultra high-speed serial ⁇ parallel conversion.
  • Figure 4 shows the experimental configuration.
  • the wavelength of the 200 fs laser pulse is matched to the exciton resonance (530 nm) of C 6 (13), and an 8-bit serial signal 11 is created from the pulse.
  • the serial signal 1 ⁇ is folded by the folding grid 12 and a delay time is added, it is focused on C 6 (13), and the readout pulse and four-wave mixing are performed.
  • the streak camera 15 detects the self-defining light of the read pulse 14 and measures its spatio-temporal characteristics.
  • 16, 17, and 19 are lenses and 18 is a mirror.
  • the direction of k r read light, k s is the direction of the signal light, light converted by the C 6 (1 3) is 2 kr - indicates that it is emitted in k s direction.
  • FIG. 6 shows a signal extracted from the streak camera 15 in the time axis direction. It can be seen that the two buckets overlap freely, but can be separated and read as separate signal packets. This shows that the optical signal of Tb its / s can be converted from serial to parallel at a response speed of 0 picoseconds or less (ie, on a conversion cycle of 100 GH).
  • the conversion efficiency of this system depends on the intensity of the signal light and the read light.
  • the number 11 J was used as the pulse energy. In that case, the conversion rate is 0. It is about 1%. This value is by no means large, but sufficient for normal photodetector sensitivity.
  • the ultra-high-speed time-simplification conversion method of an optical signal according to the present invention is a method of converting an 8-bit optical signal at 1 Tb its / s by repeating 130 GH 2 or more at room temperature.
  • RU ⁇ > Space conversion is possible, and it can be used for future T bits / s class optical communication.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Optical Communication System (AREA)

Abstract

L'invention concerne un procédé de conversion temps-espace à très grande vitesse d'un signal optique permettant la conversion temps-espace d'un signal optique, de façon efficace, à température de laboratoire. Le procédé de conversion temps-espace à très grande vitesse d'un signal optique met en oeuvre un mélange de quatre ondes lumineuses dans lequel on utilise une substance non linéaire (4) possédant une structure à puits quantique auto-organisée composite organique-minérale, et il en résulte un temps de réponse à température de laboratoire de 10 ps au plus, et une susceptibilité non linéaire du troisième ordre d'au moins 10-6 esu.
PCT/JP2000/008365 2000-06-20 2000-11-28 Procede de conversion temps-espace a tres grande vitesse d'un signal optique WO2001098824A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2000-184604 2000-06-20
JP2000184604A JP2002006350A (ja) 2000-06-20 2000-06-20 光信号の超高速時間空間変換方法

Publications (1)

Publication Number Publication Date
WO2001098824A1 true WO2001098824A1 (fr) 2001-12-27

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JP (1) JP2002006350A (fr)
WO (1) WO2001098824A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04333830A (ja) * 1991-05-10 1992-11-20 Matsushita Electric Ind Co Ltd 化合物半導体結晶および非線形光学信号処理装置
JPH0572047A (ja) * 1991-09-10 1993-03-23 Res Dev Corp Of Japan 超高速光波形測定法
US5353149A (en) * 1992-09-17 1994-10-04 Hamamatsu Photonics K.K. Apparatus for affecting time-space conversion on a light signal changing at ultra-high speed
JPH0743765A (ja) * 1993-07-28 1995-02-14 Nippon Telegr & Teleph Corp <Ntt> 光直列並列変換回路

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3300422B2 (ja) * 1992-09-17 2002-07-08 浜松ホトニクス株式会社 光波形測定装置
JPH0695177A (ja) * 1992-09-17 1994-04-08 Hamamatsu Photonics Kk 光シリアル−パラレル変換器

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04333830A (ja) * 1991-05-10 1992-11-20 Matsushita Electric Ind Co Ltd 化合物半導体結晶および非線形光学信号処理装置
JPH0572047A (ja) * 1991-09-10 1993-03-23 Res Dev Corp Of Japan 超高速光波形測定法
US5353149A (en) * 1992-09-17 1994-10-04 Hamamatsu Photonics K.K. Apparatus for affecting time-space conversion on a light signal changing at ultra-high speed
JPH0743765A (ja) * 1993-07-28 1995-02-14 Nippon Telegr & Teleph Corp <Ntt> 光直列並列変換回路

Non-Patent Citations (6)

* Cited by examiner, † Cited by third party
Title
J. ISHI, H. KUNUGITA and K. EMA, Applied Physics Letters, (27 November 2000), Vol. 77, No. 22, pages 3487-3489. *
J. ISHI, M. MIZUNO, H. KUNUGITA, et al., Journal of Nonlinear Optical Physics and Materials, (1998), Vol. 7, No. 1, pages 153-159. *
K. EMA, M. KUWATA-GONOKAMI and F. SHIMIZU, Applied Physics Letters, (1991), Vol. 59, No. 22, pages 2799-2801. *
Kazuhiro EMA et al., Tokyo Daigaku Kougakubu Sougou Shikenjo Nenpou, (1991), Vol. 50, pages 79-85. *
Kazuhiro EMA, Hikari Gijutsu Contact, 20 December 2000 (20.12.00), Vol. 38, No. 12, pages 719-726. *
T. KONDO, S. IWAMOTO, S. HAYASE, et al., Solid State Communications, (1998), Vol. 105, No. 8, pages 503-506. *

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