GB2370650A - Optical multicasting - Google Patents

Optical multicasting Download PDF

Info

Publication number
GB2370650A
GB2370650A GB0023219A GB0023219A GB2370650A GB 2370650 A GB2370650 A GB 2370650A GB 0023219 A GB0023219 A GB 0023219A GB 0023219 A GB0023219 A GB 0023219A GB 2370650 A GB2370650 A GB 2370650A
Authority
GB
United Kingdom
Prior art keywords
lt
gt
sep
signal
optical
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.)
Withdrawn
Application number
GB0023219A
Other versions
GB0023219D0 (en
Inventor
Dimitra Simeonidou
Anna Tzanakaki
Michael O'mahony
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ILOTRON Ltd
Ditech Networks Inc
Original Assignee
ILOTRON Ltd
Ditech Networks Inc
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.)
Filing date
Publication date
Application filed by ILOTRON Ltd, Ditech Networks Inc filed Critical ILOTRON Ltd
Priority to GB0023219A priority Critical patent/GB2370650A/en
Publication of GB0023219D0 publication Critical patent/GB0023219D0/en
Publication of GB2370650A publication Critical patent/GB2370650A/en
Application status is Withdrawn legal-status Critical

Links

Classifications

    • GPHYSICS
    • G02OPTICS
    • G02FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices 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
    • G02F1/35Non-linear optics
    • G02F1/353Frequency conversion, i.e. wherein a light beam with frequency components different from those of the incident light beams is generated
    • G02F1/3536Four-wave interaction
    • GPHYSICS
    • G02OPTICS
    • G02FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices 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
    • G02F1/35Non-linear optics
    • G02F1/3523Non-linear absorption changing by light, e.g. bleaching
    • GPHYSICS
    • G02OPTICS
    • G02FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2203/00Function characteristic
    • G02F2203/26Pulse shaping; Apparatus or methods therefor

Abstract

An optical signal to be multicast is mixed with a pump signal of appropriate wavelength and power and arranged to enter a nonlinear element. Full wave mixing in the nonlinear component simultaneously produces wavelength conversion and signal reshaping. The number of reshaped components can be selected and used for multicasting the information signal in the same or different fibre pathways.

Description

<img class="EMIRef" id="024184332-00010001" />

<tb>

AN <SEP> OPTICAL <SEP> MULTICASTING <SEP> DEVICE <tb> <img class="EMIRef" id="024184332-00010002" />

<tb> Field <SEP> of <SEP> the <SEP> Invention <tb> The present invention relates to the field of optical networks and in particular to multicasting in optical networks.

Summary of the Invention The present invention describes a simple, single-pass arrangement which can provide multicasting functionality in an optical network, while performing wavelength conversion and signal reshaping.

The present invention utilises the effect of Four Wave Mixing (FWM) in a non-linear element (eg fibre, SOA) and is therefore completely transparent to bit-rate and data format.

According to the present invention a signal to be multicasted is mixed with a pump signal of appropriate wavelength and power and enters a nonlinear optical element. The interaction of the two wavelengths and the nonlinearity produce a number of wavelength components due to FWM mechanism.

The present invention offers multicasting of information signals using the signal wavelengths generated through the FWM process and improved quality of the multicast signals due to reshaping.

Brief Description of the Drawings An example of the present invention will now be described in detail with reference to the accompanying drawings, in which: Figure 1 shows the relationship between the input power and the output power in a typical Four Wave Mixing regime; Figure 2 shows the relationship between the input power and the output power in a strong Four Wave Mixing regime; and, Figure 3 shows schematically an example of the present invention. <img class="EMIRef" id="024184332-00020001" />

<tb>

Detailed <SEP> Description <tb> As <SEP> shown <SEP> in <SEP> Figure <SEP> 1, <SEP> in <SEP> typical <SEP> FWM <SEP> regime, <SEP> the <SEP> power <tb> of the 1st order FWM component varies linearly with input power at low input power levels and then saturates slowly at high input power levels.

As shown in Figure 2, when strong FWM occurs (several frequency components present) some of the FWM components demonstrate a step-like transfer function.

Figure 3 shows an example of the present invention. A signal to be multicasted is mixed with a pump signal of appropriate wavelength and power and enters a nonlinear optical element. The interaction of the two wavelengths and the nonlinearity produce a number of wavelength components due to FWM mechanism.

Signal reshaping occurs in specific FWM components.

The number and position of the reshaped products will depend on the nonlinear element characteristics (eg dispersion) and can be manipulated.

The number of reshaped components can be selected and used for multicasting the information signal in the same or different fibre paths within the network.

As the FWM components power quickly assume saturated power a static power equlisation scheme will be sufficient to condition the power of the multiplexed signal.

Claims (3)

  1. <img class="EMIRef" id="024184333-00030001" />
    <tb>
    CLAIMS <tb> <img class="EMIRef" id="024184333-00030002" />
    <tb> 1. <SEP> An <SEP> apparatus <SEP> for <SEP> multicasting <SEP> an <SEP> optical <SEP> signal <SEP> in <SEP> an <tb> optical network, comprising: means to produce a pump signal; means to mix the pump signal with the optical signal to produce a mixed signal; and, a non-linear element through which the mixed signal is passed.
  2. 2. A method of multicasting an optical signal in an optical network, comprising the steps of: mixing the optical signal with a pump signal, to produce a mixed signal; and, passing the mixed signal through a non-linear element.
  3. 3. An apparatus for multicasting an optical signal in an optical network substantially as described herein with reference to the accompanying drawings.
GB0023219A 2000-09-21 2000-09-21 Optical multicasting Withdrawn GB2370650A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0023219A GB2370650A (en) 2000-09-21 2000-09-21 Optical multicasting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0023219A GB2370650A (en) 2000-09-21 2000-09-21 Optical multicasting

Publications (2)

Publication Number Publication Date
GB0023219D0 GB0023219D0 (en) 2000-11-01
GB2370650A true GB2370650A (en) 2002-07-03

Family

ID=9899897

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0023219A Withdrawn GB2370650A (en) 2000-09-21 2000-09-21 Optical multicasting

Country Status (1)

Country Link
GB (1) GB2370650A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0697775A2 (en) * 1994-08-15 1996-02-21 Nippon Telegraph And Telephone Corporation Multiple-channel all-optical TDM-WDM converter and multiple-channel all-optical TDM demultiplexer
EP0981189A2 (en) * 1998-08-19 2000-02-23 Fujitsu Limited Method and apparatus using four wave mixing for optical wavelength conversion
EP1008898A1 (en) * 1998-06-29 2000-06-14 The Furukawa Electric Co., Ltd. Wavelength multiplexing optical transmission system and wavelength converter for wavelength multiplexing optical transmission
EP1076428A2 (en) * 1999-08-10 2001-02-14 Lucent Technologies Inc. Optical fiber communication system employing wavelength converter for broadband transmission
EP1113613A2 (en) * 1999-12-28 2001-07-04 The Furukawa Electric Co., Ltd. Wavelength converting apparatus and wavelength division multiplexing system using same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0697775A2 (en) * 1994-08-15 1996-02-21 Nippon Telegraph And Telephone Corporation Multiple-channel all-optical TDM-WDM converter and multiple-channel all-optical TDM demultiplexer
EP1008898A1 (en) * 1998-06-29 2000-06-14 The Furukawa Electric Co., Ltd. Wavelength multiplexing optical transmission system and wavelength converter for wavelength multiplexing optical transmission
EP0981189A2 (en) * 1998-08-19 2000-02-23 Fujitsu Limited Method and apparatus using four wave mixing for optical wavelength conversion
EP1076428A2 (en) * 1999-08-10 2001-02-14 Lucent Technologies Inc. Optical fiber communication system employing wavelength converter for broadband transmission
EP1113613A2 (en) * 1999-12-28 2001-07-04 The Furukawa Electric Co., Ltd. Wavelength converting apparatus and wavelength division multiplexing system using same

Also Published As

Publication number Publication date
GB0023219D0 (en) 2000-11-01

Similar Documents

Publication Publication Date Title
Cotter et al. Nonlinear optics for high-speed digital information processing
EP2446561B1 (en) Transverse-mode multiplexing for optical communication systems
Liu et al. Error-free 320-Gb/s all-optical wavelength conversion using a single semiconductor optical amplifier
Patel et al. 40-Gbit/s cascadable all-optical logic with an ultrafast nonlinear interferometer
JP3590066B2 (en) Optical packet processing
Mollenauer et al. Demonstration of error-free soliton transmission over more than 15,000 km at 5 Gbit/s, single-channel, and over 11,000 km at 10 Gbit/s in a two-channel WDM
Radic et al. All-optical regeneration in one-and two-pump parametric amplifiers using highly nonlinear optical fiber
Geraghty et al. Wavelength conversion for WDM communication systems using four-wave mixing in semiconductor optical amplifiers
KR101052957B1 (en) Optical waveform monitor device using optical switch and optical switch
EP0843435A2 (en) Time division demultiplexing using selective raman amplification
Dorren et al. Optical packet switching and buffering by using all-optical signal processing methods
US8355638B2 (en) Receiver for optical transverse-mode-multiplexed signals
Calabretta et al. Optical signal processing based on self-induced polarization rotation in a semiconductor optical amplifier
Jopson et al. Dispersion compensation for optical fiber systems
DE69833304T2 (en) Total optical time-demultiplexing circuit and TDM-WDM total conversion optical circuit
Poustie et al. All-optical binary half-adder
DE60101252T2 (en) System of a diversity receiver for reducing the effects of fiber dispersion by the detection of two transmitted sidebands
US7031047B2 (en) Intensity modulation of optical signals
KR20050114660A (en) Optical pulse compressor and optical function generator, optical pulse compressing method and optical function generating method
Kelly et al. 100 Gbit/s wavelength conversion using FWM in an MQW semiconductor optical amplifier
Kawanishi et al. High sensitivity waveform measurement with optical sampling using quasi-phasematched mixing in LiNbO/sub 3/waveguide
Biberman et al. Wavelength multicasting in silicon photonic nanowires
Willner et al. Optically efficient nonlinear signal processing
Pelusi et al. Ultra-High Nonlinear As $ _2 $ S $ _3 $ Planar Waveguide for 160-Gb/s Optical Time-Division Demultiplexing by Four-Wave Mixing
Morioka et al. Multiple-output, 100 Gbit/s all-optical demultiplexer based on multichannel four-wave mixing pumped by a linearly-chirped square pulse

Legal Events

Date Code Title Description
COOA Change in applicant's name or ownership of the application
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)