Method and system using holographic methodologies for all-optical transmission and reception of high bandwidth signals to and from end-users to serve video, telephony and internet applications

• US 20020181044A1
• Filed: 09/14/2001
• Published: 12/05/2002
• Est. Priority Date: 09/14/2000
• Status: Abandoned Application

• Current Assignee: Zenwa, Inc.
• Original Assignee: Zenwa, Inc.
• Inventors: Kuykendall, Jacob L. Jr.
• Application Number:
  US09/953,029
• Publication Number:
  US 20020181044A1
• Time in Patent Office: Days
• US Class Current: 398/70
• CPC Class Codes: G02B 19/0009 having refractive surfaces only
• CPC Class Codes: G02B 19/0014 at least one surface having optical power
• CPC Class Codes: G02B 19/0057 in the form of a laser diode array, e.g. laser diode bar semiconductor laser arrays with beam combining arrangement H01S5/4012
• CPC Class Codes: G02B 27/108 for sampling a portion of a beam or combining a small beam in a larger one, e.g. wherein the area ratio or power ratio of the divided beams significantly differs from unity, without spectral selectivity
• CPC Class Codes: G02B 27/1086 operating by diffraction only
• CPC Class Codes: G02B 27/144 using partially transparent surfaces without spectral selectivity G02B27/147 takes precedence
• CPC Class Codes: G02B 27/145 having sequential partially reflecting surfaces
• CPC Class Codes: G02B 5/32 Holograms used as optical elements
• CPC Class Codes: G02B 6/2931 Diffractive element operating in reflection
• CPC Class Codes: G02B 6/29311 Diffractive element operating in transmission
• CPC Class Codes: G02B 6/29383 Adding and dropping
• CPC Class Codes: G02B 6/4206 Optical features G02B6/4207, G02B6/421 take precedence
• CPC Class Codes: G02B 6/4215 the intermediate optical elements being wavelength selective optical elements, e.g. variable wavelength optical modules or wavelength lockers G02B6/4246 takes precedence
• CPC Class Codes: G02B 6/4249 comprising arrays of active devices and fibres
• CPC Class Codes: G02B 6/425 Optical features semiconductor laser arrays H01S5/40; hybrid LED arrays H01L25/0753; monolithic LED arrays H01L27/153
• CPC Class Codes: G02B 6/4296 coupling with sources of high radiant energy, e.g. high power lasers, high temperature light sources
• CPC Class Codes: H01S 5/4012 Beam combining, e.g. by the use of fibres, gratings, polarisers, prisms
• CPC Class Codes: H04B 10/272 Star-type networks or tree-type networks
• CPC Class Codes: H04J 14/0221 Power control, e.g. to keep the total optical power constant
• CPC Class Codes: H04J 14/0226 Fixed carrier allocation, e.g. according to service
• CPC Class Codes: H04J 14/0246 : using one wavelength per ONU
• CPC Class Codes: H04J 14/025 : using one wavelength per ONU, e.g. for transmissions from-ONU-to-OLT or from-ONU-to-ONU
• CPC Class Codes: H04J 14/0282 : WDM tree architectures
• CPC Class Codes: H04J 14/0283 : WDM ring architectures

Abstract

An optical transmission system includes a plurality of service provider systems providing transmission-based services; a plurality of end-user devices receiving transmission-based services and a central hub node including a first plurality of terminals for supporting bi-directional transmission of optical signals between the plurality of service provider systems and the central hub node and a second plurality of terminals for supporting bi-directional transmission of optical signals between the end-user devices and the central hub node. The system further includes a first transmission network coupled between the plurality of service provider systems and the plurality of first terminals of the central hub node for enabling the bi-directional transmission of optical signals between the plurality of service provider systems and the plurality of first terminals of the central hub node and a second transmission network coupled between the plurality of end-user devices and the plurality of second terminals of the central hub node for enabling the bi-directional transmission of optical signals between the plurality of end-user devices and the plurality of first terminals of the central hub node. The bidirectional optical transmission between each of the plurality of end-user devices and the central hub node occurs at a dedicated wavelength that is unique to each end-user device.

Claims

1. A method for delivering optical channels of bandwidths in the general range of from 2 to 5 GHz, with channel spacing of from 0.01 to 0.03 nm, to and from a central hub and multiple end-user locations at a distance of typically up to 25 miles, utilizing a system consisting of a holographic-based dense wave division multiplexer/demultiplexer module that is configured in a distributed, cascaded arrangement of two or more stages, the cascaded modules deployed between the central hub location and the end-user location, that utilizes a an optical tree fiber network configured as a logical star network permanently connecting one or more dedicated unique wavelength for each end-user at the points of the star.

2. The method of claim 1 further comprising constructing the optical tree network with a modular distributed dense wave division multiplexer system configured to carry typically 10,000 multi-gigabit channels to and from a hub location, using L, C, S bands and spectrum outside of the conventional ITU bands, with the cascaded modules of a distributed DWDM located at each branch of the tree, connected by fibers that carry multiple channels between the hub location and a second cascaded dense wave division multiplexer module, a next fiber segment connecting the second and a third cascaded dense wave division multiplexer module and a dedicated fiber or fiber pair between the third stage and the end-user, carrying at least two wavelengths to the end-user.

3. The method of claim 2, further comprising delivering nominally up to 10,000 wavelengths to and from up to 10,000 end-user locations within a radius of approximately 25 miles, comprising low insertion loss dense wave division multiplexer cascaded network modules, having narrow channel spacing of a high channel count stage of the mux/de-mux module and an optical feed back system to lock channel power laser sources.

4. The method of claim 3, further comprising collecting and distributing optical traffic in a geographical local service area utilizing dedicated wavelengths for each of a plurality of end-users, and providing bandwidths of nominally 2.0 to 5 GHz, by performing one of modulation from 1 Gb/s up to 5 Gb/s, using non-return-to zero modulation and up to 10 Gb/s using bandwidth efficient modulation.

5. A method for configuring an access network consisting of a high channel capacity star network with a dedicated wavelength delivered to each of a plurality of end-users at points of the star, implemented over an all-optical fiber tree configuration with distributed dense wave division multiplexer modules located at each branch of the tree, the network serving as an optical local loop distribution network, to accommodate delivery of all telecommunications services between a central hub location and end-users within a radius of typically 25 miles.

6. An improved optical local network comprising strategically located endpoints to form virtual optical networks for purposes of serving multi-gigabit data rate channels for carrying IP or other transport protocol-based mobile base station traffic, dropping and inserting mobile traffic bandwidth to serve wireless base transmit sites that are dispersed throughout the end-user serving area, utilizing similar systems as are residential end-users or business end-users, and appear as virtual private networks.

7. The improved optical local network of claim 6 for carrying geographically dispersed servers, disks and automated tape libraries for purposes of transferring files for storage

8. An improved method for generating and delivering pump power for Raman and Erbium Doped Fiber amplifiers, through combining laser power sources through a holographic beam combiner, combining power on the same wavelengths or on a family of dissimilar wavelengths to achieve “

flat”

power profiles of desired output levels, and delivering the power to a fiber transmission facility through ports on the same DWDM systems that carry information channels.

9. An improved method for generating and delivering channel carrier laser power to a fiber transmission facility, through holographic power combining techniques.

10. An improved method for creating large laser power combining facilities, to be used on multiple fibers for multiple star network configurations, both as pump power sources and as shared per channel power sources.

11. An improved method for providing carrier laser power to an end-user location, from a central hub location.

14. The system of claim 13 wherein said second transmission network comprises a demultiplexer system for demultiplexing each optical signal transmitted from said plurality of second terminals of said central hub node into a plurality of said dedicated wavelength optical signals unique to each of said plurality of end-user devices.

15. The system of claim 14 wherein said second transmission network comprises a multiplexer system for multiplexing each of said plurality of said dedicated wavelength optical signals unique to each of said plurality of end-user devices to optical signals transmitted to said plurality of second terminals of said central hub node.

16. The system of claim 15 wherein said transmission-based services provided by said plurality of service providers include at least one of telephone services, video broadcast services, internet services and data transmission services.

17. The system of claim 16 wherein each of said end-user devices comprises one of a home and business, each including a conversion device for converting said dedicated wavelength optical signal to an electrical signal which utilized by a data device associated with said one of a home and business.

18. The system of claim 17 wherein each conversion device further converts electrical signals from said data device to optical signals having said dedicated wavelength for transmission to said central hub node.

19. The system of claim 18 wherein said second transmission network comprises at least one intermediate node between said central hub node and said plurality of end-user devices.

20. The system of claim 19 wherein said at least one intermediate node includes a first node located approximately 0 to 5 miles from each end-user device and a second node located between said first node and said central hub node and wherein said central hub node is located up to 25 miles from each end-user device.

21. The system of claim 13 wherein said bi-directional transmission of optical signals between said plurality of end-user devices and said plurality of first terminals of said central hub node occurs in a bandwidth having a range of approximately 2 GHz to 10 GHz.

22. The system of claim 13 wherein said central hub node includes a power pump for providing power to said first and second transmission networks.

12. An improved method for providing first and second order power to a Raman amplifier located in the return path of a fiber transmission facility, serving multiple end-users through a shared Raman amplifier facility.

13. An optical transmission system comprising:

a plurality of service provider systems providing transmission-based services;

a plurality of end-user devices receiving transmission-based services;

a central hub node including a first plurality of terminals for supporting bidirectional transmission of optical signals between said plurality of service provider systems and said central hub node and a second plurality of terminals for supporting bidirectional transmission of optical signals between said end-user devices and said central hub node;

a first transmission network coupled between said plurality of service provider systems and said plurality of first terminals of said central hub node for enabling said bidirectional transmission of optical signals between said plurality of service provider systems and said plurality of first terminals of said central hub node; and

a second transmission network coupled between said plurality of end-user devices and said plurality of second terminals of said central hub node for enabling said bidirectional transmission of optical signals between said plurality of end-user devices and said plurality of first terminals of said central hub node;

wherein said bi-directional optical transmission between each of said plurality of end-user devices and said central hub node occurs at a dedicated wavelength that is unique to each end-user device.