KR20150075823A - Apparatus and method for forming of wavelength division multiplexing passive optical network optical signal - Google Patents
Apparatus and method for forming of wavelength division multiplexing passive optical network optical signal Download PDFInfo
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- KR20150075823A KR20150075823A KR1020130164164A KR20130164164A KR20150075823A KR 20150075823 A KR20150075823 A KR 20150075823A KR 1020130164164 A KR1020130164164 A KR 1020130164164A KR 20130164164 A KR20130164164 A KR 20130164164A KR 20150075823 A KR20150075823 A KR 20150075823A
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- channel
- optical signal
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- wavelength
- broadband
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/501—Structural aspects
- H04B10/503—Laser transmitters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
Abstract
Description
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the field of optical communication, and more particularly, to a wavelength division multiplexing passive optical network (WDM-PON) in which a broadband light source is used, Forming apparatus and method.
A WDM-PON (wavelength division multiplexing passive optical network) optical communication is a technology that can simultaneously transmit optical signals of dozens of different wavelengths through a single optical fiber, and provides a point-to-point It is recognized as a technology that can lead future communication technology by securing superior technical superiority than other optical communication technologies such as providing independent wavelength channel by connection and high-speed access network configuration.
In such a WDM-PON optical communication, an optical line terminal (OLT) plays a role as an optical transceiver in a national office or a central office (CO). FIG. 1 is a view illustrating an optical transmitter part of an OLT structure using injection seeding technology that is currently commercialized. 1, a structure of a WDM-PON optical transmitter used in the prior art includes a broadband light source (BLS) 103, 106 for injection seeding, a
Meanwhile, FIG. 2 is a view illustrating the structure of an OLT using a vertical cavity surface emitting laser (VCSEL). The optical signals (? 1,? 2,? 3, ...,? N) emitted from the
The present invention provides an optical signal forming apparatus and method that does not require a complicated wavelength control circuit by using a broadband light source in a wavelength division multiplexing passive optical network (WDM-PON) .
A method of forming an optical signal in a wavelength division multiplexing passive optical network (WDM-PON) of the present invention includes the steps of emitting a broadband optical signal in a broadband light source, using the broadband optical signal as a multi-channel optical wavelength filter Generating an optical signal for each channel corresponding to a central wavelength of each channel; modulating the optical signal for each channel with an optical modulator to form a digital signal for each channel; And multiplexing the signals to form an output optical signal.
In addition, the WDM-PON (wavelength division multiplexing passive optical network) optical signal forming apparatus of the present invention includes: a broadband light source that emits a broadband optical signal; A light modulator for modulating the optical signal for each channel to form a digital signal for each channel and a multiplexing AWG for multiplexing the digital signal for each channel to form an output optical signal do.
According to the present invention, a broadband light source (BLS) and a passive optical wavelength filter are used to fabricate an optical transmitter used in a WDM-PON (wavelength division multiplexing passive optical network) Since no separate circuit or module is required, the system operation can be simplified and the cost can be reduced.
BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is an exemplary diagram illustrating an optical transmitter portion of an optical line terminal (OLT).
FIG. 2 is a view showing the structure of an OLT using a vertical cavity surface emitting laser (VCSEL). FIG.
FIG. 3 and FIG. 4 are views showing the configuration of an optical signal forming apparatus according to an embodiment of the present invention. FIG.
5 is a flowchart illustrating a procedure of an optical signal forming method according to an embodiment of the present invention.
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions will not be described in detail if they obscure the subject matter of the present invention.
3 is an exemplary view showing a configuration of an optical signal forming apparatus according to an embodiment of the present invention.
3, when a broadband optical signal is emitted from a
The optical wavelength characteristic of the optical signal for each channel according to the present embodiment is as shown in the bottom of Fig. 3, for example. Reference symbol a denotes a wavelength or a loss profile of a broadband optical signal emitted from the
As another embodiment, the optical
The present embodiment relates to a technique for generating an optical signal having a plurality of light wavelengths by using a single wideband light source, and can be applied to various fields where an optical signal having a plurality of light wavelengths is used.
5 is a flowchart illustrating a procedure of an optical signal forming method according to an embodiment of the present invention.
Referring to FIG. 3, a broadband optical signal may be emitted from a
Although the method has been described through particular embodiments, the method may also be implemented as computer readable code on a computer readable recording medium. A computer-readable recording medium includes all kinds of recording apparatuses in which data that can be read by a computer system is stored. Examples of the computer-readable recording medium include a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like, and may be implemented in the form of a carrier wave (for example, transmission over the Internet) . In addition, the computer-readable recording medium may be distributed over network-connected computer systems so that computer readable codes can be stored and executed in a distributed manner. In addition, functional programs, codes, and code segments for implementing the above embodiments can be easily deduced by programmers of the present invention.
Although the present invention has been described in connection with some embodiments thereof, it should be understood that various changes and modifications may be made therein without departing from the spirit and scope of the invention as understood by those skilled in the art. something to do. It is also contemplated that such variations and modifications are within the scope of the claims appended hereto.
101: laser diode 102: AWG
103: broadband light source 104: filter
105: Fiber 106: C-BLS
201: VCSEL 202: Common port
203: optical power separator 204: monitor AWG
205: monitor photodiode 206:
207: TEC 300: Optical Transmitter
301: broadband light source 302: multi-channel light wavelength filter
303:
305: Common port
Claims (5)
In a broadband light source, emitting a broadband optical signal,
A multi-channel optical wavelength filter, comprising the steps of: generating an optical signal for each channel coinciding with a central wavelength of each channel using the wideband optical signal;
Modulating an optical signal for each channel with an optical modulator to form a digital signal for each channel;
And multiplexing the channel-specific digital signals with an AWG for multiplexing to form an output optical signal.
The linewidth of the optical signal for each channel may be expressed as:
1 to 9 MHz.
A broadband light source for emitting a broadband optical signal,
A multi-channel lightwave filter for generating an optical signal for each channel coinciding with a center wavelength of each channel using the wideband optical signal;
An optical modulator for modulating the optical signal for each channel to form a digital signal for each channel,
And a multiplexing AWG for multiplexing the digital signals for each channel to form an output optical signal.
The linewidth of the optical signal for each channel may be expressed as:
1 to 9 MHz.
Wherein at least two or more of the broadband light source, the multi-channel lightwave wavelength filter, the optical modulator, and the AWG for multiplexing are integrated in the form of a PIC (photonics integrated chip).
Priority Applications (1)
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KR1020130164164A KR20150075823A (en) | 2013-12-26 | 2013-12-26 | Apparatus and method for forming of wavelength division multiplexing passive optical network optical signal |
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KR1020130164164A KR20150075823A (en) | 2013-12-26 | 2013-12-26 | Apparatus and method for forming of wavelength division multiplexing passive optical network optical signal |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018227005A1 (en) * | 2017-06-07 | 2018-12-13 | Ii-Vi Delaware, Inc. | Integrated wdm optical transceiver |
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2013
- 2013-12-26 KR KR1020130164164A patent/KR20150075823A/en not_active Application Discontinuation
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018227005A1 (en) * | 2017-06-07 | 2018-12-13 | Ii-Vi Delaware, Inc. | Integrated wdm optical transceiver |
CN110892655A (en) * | 2017-06-07 | 2020-03-17 | 贰陆特拉华公司 | Integrated WDM optical transceiver |
GB2577218A (en) * | 2017-06-07 | 2020-03-18 | Ii Vi Delaware Inc | Integrated WDM optical transceiver |
GB2577218B (en) * | 2017-06-07 | 2023-02-15 | Ii Vi Delaware Inc | Integrated WDM optical transceiver |
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