US20070206910A1 - Optical fibers and optical fiber devices with total dispersion greater than material dispersion - Google Patents

Optical fibers and optical fiber devices with total dispersion greater than material dispersion Download PDF

Info

Publication number
US20070206910A1
US20070206910A1 US11/367,495 US36749506A US2007206910A1 US 20070206910 A1 US20070206910 A1 US 20070206910A1 US 36749506 A US36749506 A US 36749506A US 2007206910 A1 US2007206910 A1 US 2007206910A1
Authority
US
United States
Prior art keywords
mode
dispersion
fiber
optical
hom
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.)
Abandoned
Application number
US11/367,495
Other languages
English (en)
Inventor
Siddharth Ramachandran
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to US11/367,495 priority Critical patent/US20070206910A1/en
Priority to EP07003361.8A priority patent/EP1835317B1/en
Priority to JP2007052312A priority patent/JP4891812B2/ja
Priority to CNA2007100844429A priority patent/CN101153938A/zh
Priority to CN201010128672A priority patent/CN101852887A/zh
Publication of US20070206910A1 publication Critical patent/US20070206910A1/en
Priority to US12/214,735 priority patent/US8189977B2/en
Priority to US12/147,806 priority patent/US8175435B2/en
Priority to US12/147,904 priority patent/US8175436B2/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/02—Optical fibres with cladding with or without a coating
    • G02B6/02214—Optical fibres with cladding with or without a coating tailored to obtain the desired dispersion, e.g. dispersion shifted, dispersion flattened
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/02—Optical fibres with cladding with or without a coating
    • G02B6/02057—Optical fibres with cladding with or without a coating comprising gratings
    • G02B6/02076—Refractive index modulation gratings, e.g. Bragg gratings
    • G02B6/0208—Refractive index modulation gratings, e.g. Bragg gratings characterised by their structure, wavelength response
    • G02B6/02085—Refractive index modulation gratings, e.g. Bragg gratings characterised by their structure, wavelength response characterised by the grating profile, e.g. chirped, apodised, tilted, helical
    • G02B6/02095—Long period gratings, i.e. transmission gratings coupling light between core and cladding modes
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/02—Optical fibres with cladding with or without a coating
    • G02B6/036—Optical fibres with cladding with or without a coating core or cladding comprising multiple layers
    • G02B6/03616—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference
    • G02B6/03638—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference having 3 layers only
    • G02B6/03644—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference having 3 layers only arranged - + -
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/02—Optical fibres with cladding with or without a coating
    • G02B6/036—Optical fibres with cladding with or without a coating core or cladding comprising multiple layers
    • G02B6/03616—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference
    • G02B6/03688—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference having 5 or more layers
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
    • G02B6/29371—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating principle based on material dispersion
    • G02B6/29374—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating principle based on material dispersion in an optical light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/02—Optical fibres with cladding with or without a coating
    • G02B6/02004—Optical fibres with cladding with or without a coating characterised by the core effective area or mode field radius
    • G02B6/02009—Large effective area or mode field radius, e.g. to reduce nonlinear effects in single mode fibres
    • G02B6/02023—Based on higher order modes, i.e. propagating modes other than the LP01 or HE11 fundamental mode
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
    • G02B6/29304—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating
    • G02B6/29316—Light guides comprising a diffractive element, e.g. grating in or on the light guide such that diffracted light is confined in the light guide
    • G02B6/29317—Light guides of the optical fibre type

Definitions

  • the invention relates to optical fibers devices wherein the total dispersion of the device is greater than the material dispersion.
  • An optical fiber can guide light with multiple spatial patterns, each of which is uniquely designated as a transverse mode of the fiber (hereafter, called mode, for brevity).
  • mode transverse mode of the fiber
  • the dispersive characteristics of an optical signal in a fiber depend on the mode in which it is travelling. Thus, each mode may be characterised with a dispersion value specific to it.
  • the dispersion of a mode is roughly equal to the sum of the material dispersion (D m ) and waveguide dispersion (D w ).
  • the material dispersion is the dispersion of the material in which the optical signal resides—that is, the material of which the fiber is made (most commonly, Silica with trace amounts of Germanium, Phosphorus, Fluorine and other dopants).
  • the waveguide dispersion is due to the refractive index profile that defines a fiber waveguide.
  • the waveguide dispersion D w is negative.
  • the refractive index profile of a fiber can designed to obtain extremely large, negative values of D w , and hence the fiber dispersion D total , of varying negative magnitudes can be achieved, most fibers are bounded by the material dispersion, in maximum achievable dispersion.
  • Silica even with a variety of dopants, has D m >0 for wavelengths greater than roughly 1300 nm, and has D m ⁇ 0 for wavelengths below 1300 nm.
  • D total positive or negative dispersion
  • optical response of an optical pulse in a fiber depends critically on the dispersion it experiences. This is true for both linear effects such as pulse spreading, and nonlinear effects such as pulse distortion and soliton formation.
  • dispersion of a fiber plays a key role in designing fiber-based devices.
  • optical fiber communications systems typically operate at 1300 nm or between 1500 and 1650 nm
  • many other important optical systems operate at lower wavelengths.
  • a preferred wavelength of operation for fiber lasers is at 1060 nm.
  • the ubiquitous titanium-doped sapphire laser which is used in several pump-probe experiments as well as in biomedical imaging or therapy, typically operates in wavelength range of 700 nm to 1000 nm.
  • wavelengths visible to the human eye spans the range of 400 to 700 nm.
  • Fibers that have positive or zero dispersion in these wavelength ranges would enable propagation of solitons and generate broadband supercontinua, of interest to biomedical imaging systems, for instance.
  • positive but low dispersion fibers are required at these wavelengths.
  • optical fibers that can provide stable propagation for optical pulses of wavelength less than 1300 nm, whose dispersion is positive and can be adjusted by suitably designing the refractive index profile. This requires a fiber whose waveguide dispersion D w can be designed to be greater than zero in any desired wavelength range.
  • optical fibers are single-moded, which means that they support only the lowest order, fundamental mode, also designated as the LP 01 , mode.
  • the two numerals in the subscript refer to the number of intensity minimas (zeroes) the spatial light pattern has, in the azimuthal (1 st subscript) and radial (2 nd subscript) directions, respectively.
  • the LP 01 in standard silica fibers where the refractive index profile is defined by various dopants to silica can achieve only D w ⁇ 0.
  • Air-silica fibers that contain air holes that extend longitudinally along the axis of the fiber (called air-silica fibers, hereafter) possess interesting properties, as described by J. C. Knight and coworkers in volume 12, page 807 of the July 2000 issue of the IEEE Photonics Technology Letters, entitled “Anomalous Dispersion in Photonic Crystal Fiber.” They demonstrate that air-silica fibers can achieve large positive dispersion in any wavelength range. However, the dispersion of air-silica fibers is closely tied to their modal areas, and it is not possible to achieve high dispersion as well as large effective modal areas—hence, this design space would be of limited use in systems requiring high positive dispersion but also low nonlinearities.
  • HOM fibers suffer from a severe drawback common to most fibers that support more than a single mode. While it is desired to have light residing substantially in the desired HOM, the presence of other modes makes such designs susceptible to mode coupling, by which process light can either be lost or can cause deleterious interference-noise problems. Such mode coupling increases as the difference in effective index (n eff ) between the desired modes and any other mode, decreases.
  • n eff effective index
  • the design space disclosed by the above authors leads to identical n eff for the LP 02 and LP 11 modes, at the operation wavelengths. Hence these designs are especially susceptible to both interference noise and loss.
  • the present invention is directed to optical fiber devices incorporating optical fibers with refractive index profiles that yield D total >D m in any wavelength range such that D total ⁇ +50 ps/nm-km, as would be desired in a variety of fiber devices exploiting optical nonlinearities.
  • the aforementioned refractive index profile yields the given dispersion values when light resides substantially in a single higher order mode (HOM) of the fiber.
  • HOM higher order mode
  • this HOM would be the LP 02 mode of the fiber, but those skilled in the art will realize that such designs can be extended to other HOMs, such as the LP 11 or the LP 03 modes.
  • a refractive index profile that yields D total >D m in any wavelength range, with no constraints on the magnitude of dispersion D total , but that simultaneously yields stable, mode-coupling-free propagation of the signal.
  • the fiber designs are constrained to those that additionally achieve a difference in n eff (designated as ⁇ n eff hereafter) between the desired HOM and any other mode, of an absolute value greater than 10 ⁇ 4 .
  • Fibers, as those whose designs are disclosed here, that achieve D total >0 and absolute value of ⁇ n eff >10 ⁇ 4 will enable a variety of fiber devices in the wavelength ranges ⁇ 1300 nm, for which only bulk-optic devices exist currently.
  • the present invention also relates to an apparatus for obtaining a device with D total >D m comprising the fiber and at least one mode converter that converts the incoming light into the desired HOM of the fiber, such that light propagation occurs substantially in the desired mode.
  • this device will also comprise a mode converter at the output of the device, so as to obtain a familiar Gaussian spatial pattern of light out of the device.
  • the mode converter is a static or tunable long-period fiber grating.
  • FIG. 1 shows the index profile of a fiber that supports more than one mode, but which is designed to yield desired the D total for the LP 02 mode.
  • the refractive index profile comprises a core, 10 , with ⁇ N of 0.039 extending to a radial position of 1 ⁇ m; followed by a trench region (down-doped ring), 11 , with ⁇ N of ⁇ 0.008 and a thickness of 0.5 ⁇ m; followed by an up-doped ring, 12 , with ⁇ N of 0.027 and a thickness of 1.4 ⁇ m.
  • the fiber cladding consisting only of silica glass, 13 , extends to the edge of the glass cladding of the fiber.
  • the refractive index profile is characterized in terms of ⁇ N, the difference in refractive index between the region of interest and the silica cladding.
  • FIG. 2 shows the dispersion as a function of wavelength, of the LP 02 mode, 20 , for the fiber described in FIG. 1 . Also shown is the material dispersion of silica ( 21 ), which is highly negative in the wavelength range of 820-900 nm. As a reference, FIG. 2 also shows a dashed line ( 22 ), which denotes the zero dispersion line. From this Figure, it is apparent that the LP 02 mode of this fiber has large waveguide dispersion D w .
  • the waveguide dispersion of a medium is approximately constant with respect to a complimentary scaling of waveguide dimensions and wavelength of operation, as described in detail by Snyder and Love in Optical Waveguide Theory , Chapman and Hall, New York, 1983.
  • the complimentary scaling concept states that a waveguide has approximately the same waveguide dispersion D w , for a given ratio of the dimensional scale of the waveguide to the wavelength of operation.
  • FIG. 1 describes a fiber that yields small positive dispersion in the 800-900 nm wavelength range
  • appropriately scaling the radial dimensions of the refractive index profile will yield a similar waveguide that yields the same magnitude of D w for the LP 02 mode at an alternative wavelength.
  • this design template may be used to obtain small positive dispersion in any desired wavelength range ⁇ 1300 nm.
  • FIG. 2 shows that the dispersion slope, as defined by the derivative of D total with respect to wavelength, is zero, negative, or positive, depending on the wavelength of operation.
  • FIG. 3 shows the index profile of a fiber that supports more than one mode, but which is designed to yield desired D total for the LP 02 mode, while additionally ensuring that the optical signal is stable with respect mode coupling.
  • the refractive index profile comprises a core, 30 , with ⁇ N of 0.026 extending to a radial position of 1.1 ⁇ m; followed by a trench region, 31 , with ⁇ N of ⁇ 0.0087 and a thickness of 1.4 ⁇ m; followed by an up-doped ring, 32 , with ⁇ N of 0.022 and a thickness of 0.7 ⁇ m; followed by a trench region, 33 , with ⁇ N of ⁇ 0.0085 and a thickness of 0.7 ⁇ m; followed by an up-doped ring, 34 , with ⁇ N of 0.015 and a thickness of 1.44 ⁇ m; followed by a trench region, 35 , with ⁇ N of ⁇ 0.0073 and a thickness of 1 ⁇ m.
  • the fiber cladding, 36
  • FIG. 4 shows the dispersion D total , for the LP 02 mode of the waveguide described in FIG. 3 .
  • the LP 0 2 mode has large positive dispersion, up to a magnitude of +100 ps/nm-km, at the wavelength of 1040 nm.
  • it has positive dispersion in a wavelength range spanning 120 nm, from 1040 nm to 1160 nm.
  • FIG. 5 show the effective indices n eff , of two different modes for the fiber shown in FIG. 3 .
  • Line 50 is the n eff of the LP 02 mode, which has the large positive D total , and which is the desired mode of operation
  • line 51 is the n eff for the LP 1 , mode, which has n eff values closest to those of the desired LP 02 mode of this fiber.
  • the difference in n eff between the two modes is greater than 10 ⁇ 4 over the entire preferred wavelength range of operation, spanning from 1040 nm to 1160 nm.
  • This large separation between the LP 02 mode and any other guided mode of this fiber ensures that light propagating in the LP 02 mode will not easily couple to any other mode of this fiber, hence ensuring stable, mode-coupling-free, low-loss propagation of the optical signal.
  • the n eff of other guided modes in this fiber were not plotted in FIG. 5 , because their separation from the LP 02 mode is even larger, and hence do not contribute to instabilities due to mode coupling.
  • FIG. 6 shows the refractive index profile of a fabricated fiber preform that yields an LP 02 mode which satisfies both the above conditions.
  • the LP 02 mode has dispersion D total ⁇ +40 ps/nm-km, for the wavelength range spanning 100 nm from 820-920 nm. Hence, this yields a fiber with low positive dispersion in a wavelength range where the material dispersion is large and negative (approximately ⁇ 100 ps/nm-km, as shown in FIG. 2 ). Note that the dispersion curve shown in FIG. 7 (as well as the curve shown in FIG. 2 ) has a turnover region in the wavelength range of interest, i.e. at the operating wavelength.
  • FIG. 8 shows the n eff of the LP 02 mode ( 80 ) and LP 11 mode ( 81 ), respectively.
  • the LP 11 mode has n eff closest to the LP 02 mode of this fiber, and hence it suffices to study their difference to evaluate the resistance to mode coupling here. From FIG. 8 , it can be inferred that the difference in n eff ( ⁇ n eff ) is greater than 10 ⁇ 4 over the entire desired wavelength of operation, spanning from 820-920 nm.
  • Optical devices using the aforementioned inventive fibers will require mode converters in order to introduce the optical signal into the preferred mode of the HOM fiber.
  • an incoming optical beam usually Gaussian in spatial pattern because that is the mode of choice for conventional fibers as well as free-space beams, must be spatially converted into the preferred HOM with high efficiency.
  • This can be readily achieved with suitably designed long-period fiber-gratings, whose operation as both static and dynamic mode converters is described in detail in U.S. Pat. Nos. 6,084,996 and 6,768,835.
  • Fiber-grating mode-converters can achieve losses as low as 0.1 dB while providing mode conversion efficiencies as high as 99.99%, as experimentally demonstrated by Ramachandran et al, and described in Optics Letters , vol. 27, p. 698, 2002, entitled “Bandwidth control of long-period grating-based mode converters in few-mode fibers.”
  • An exemplary device construction using fiber gratings is shown in FIG. 9 ( a ), where the HOM fiber is connected to gratings at the input and output of the fiber, so as to ensure that the input as well as output of the device is a conventional Gaussian mode even though the preferred mode of operation inside the device may be different.
  • the light source and optical path may have any suitable wavelength but is preferably below 1300 nm.
  • LOM conventional lower order mode
  • the device can be concatenated to any other system, be it an Yb-doped fiber laser that requires positive dispersion inside the laser cavity, or a pulse delivery scheme for a Ti:Sapphire laser, where the device is used after light exits the solid-state laser (lasers and systems architectures not shown in Figure).
  • FIG. 9 ( b ) Alternatively, discrete phase plates, as described by Ishaaya et al in Optics Letters , vol. 30, p. 1770, 2005, entitled “Intracavity coherent addition of single high-order modes.”
  • This schematic is shown in FIG. 9 ( b ).
  • the schematic of FIG. 9 ( c ) may be suitable, where an appropriate mode-converter transforms the incoming Gaussian mode into the desired HOM, but the output is simply collimated and relayed in free-space.
  • the optical fiber device is designed for propagation of a higher order mode (HOM) in a section of optical waveguide, preferably an optical fiber, such that the total dispersion in the section of optical fiber is greater than the material dispersion in the section of optical waveguide.
  • HOM higher order mode
  • the optical waveguide/fiber supports propagation of the HOM as the main propagating mode, i.e. with most of the optical energy in the preferred HOM.
  • the preferred HOM has an effective refractive index that is different from the effective refractive index for any other mode by at least 0.0001.
  • an optical fiber having this characteristic may be referred to as a few mode fiber, i.e., one that supports at least one mode in addition to a fundamental mode.
  • the present invention is directed to optical fiber devices incorporating optical fibers with refractive index profiles that yield D total >D m in any wavelength range such that D total ⁇ +50 ps/nm-km, as would be desired in a variety of fiber devices exploiting optical nonlinearities.
  • the aforementioned refractive index profile yields the given dispersion values when light resides substantially in a single higher order mode (HOM) of the fiber.
  • HOM higher order mode
  • this HOM would be the LP 02 mode of the fiber, but those skilled in the art will realize that such designs can be extended to other HOMs, such as the LP 11 or the LP 03 modes.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
  • Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
  • Optical Integrated Circuits (AREA)
US11/367,495 2006-03-04 2006-03-04 Optical fibers and optical fiber devices with total dispersion greater than material dispersion Abandoned US20070206910A1 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US11/367,495 US20070206910A1 (en) 2006-03-04 2006-03-04 Optical fibers and optical fiber devices with total dispersion greater than material dispersion
EP07003361.8A EP1835317B1 (en) 2006-03-04 2007-02-16 Optical fibers and optical fiber devices with dispersion
JP2007052312A JP4891812B2 (ja) 2006-03-04 2007-03-02 材料分散よりも大きな総分散を有する光ファイバと光ファイバ・デバイス
CNA2007100844429A CN101153938A (zh) 2006-03-04 2007-03-02 有色散的光纤和光纤装置
CN201010128672A CN101852887A (zh) 2006-03-04 2007-03-02 有色散的光纤和光纤装置
US12/214,735 US8189977B2 (en) 2006-03-04 2008-06-20 Optical fibers and optical fiber devices with total dispersion greater than material dispersion
US12/147,806 US8175435B2 (en) 2006-03-04 2008-06-27 Optical fibers and optical fiber devices with total dispersion greater than material dispersion
US12/147,904 US8175436B2 (en) 2006-03-04 2008-06-27 Optical fibers and optical fiber devices with total dispersion greater than material dispersion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11/367,495 US20070206910A1 (en) 2006-03-04 2006-03-04 Optical fibers and optical fiber devices with total dispersion greater than material dispersion

Related Child Applications (3)

Application Number Title Priority Date Filing Date
US12/214,735 Division US8189977B2 (en) 2006-03-04 2008-06-20 Optical fibers and optical fiber devices with total dispersion greater than material dispersion
US12/147,806 Continuation US8175435B2 (en) 2006-03-04 2008-06-27 Optical fibers and optical fiber devices with total dispersion greater than material dispersion
US12/147,904 Continuation US8175436B2 (en) 2006-03-04 2008-06-27 Optical fibers and optical fiber devices with total dispersion greater than material dispersion

Publications (1)

Publication Number Publication Date
US20070206910A1 true US20070206910A1 (en) 2007-09-06

Family

ID=38308640

Family Applications (4)

Application Number Title Priority Date Filing Date
US11/367,495 Abandoned US20070206910A1 (en) 2006-03-04 2006-03-04 Optical fibers and optical fiber devices with total dispersion greater than material dispersion
US12/214,735 Active 2027-07-12 US8189977B2 (en) 2006-03-04 2008-06-20 Optical fibers and optical fiber devices with total dispersion greater than material dispersion
US12/147,806 Active 2027-06-27 US8175435B2 (en) 2006-03-04 2008-06-27 Optical fibers and optical fiber devices with total dispersion greater than material dispersion
US12/147,904 Active 2027-09-14 US8175436B2 (en) 2006-03-04 2008-06-27 Optical fibers and optical fiber devices with total dispersion greater than material dispersion

Family Applications After (3)

Application Number Title Priority Date Filing Date
US12/214,735 Active 2027-07-12 US8189977B2 (en) 2006-03-04 2008-06-20 Optical fibers and optical fiber devices with total dispersion greater than material dispersion
US12/147,806 Active 2027-06-27 US8175435B2 (en) 2006-03-04 2008-06-27 Optical fibers and optical fiber devices with total dispersion greater than material dispersion
US12/147,904 Active 2027-09-14 US8175436B2 (en) 2006-03-04 2008-06-27 Optical fibers and optical fiber devices with total dispersion greater than material dispersion

Country Status (4)

Country Link
US (4) US20070206910A1 (zh)
EP (1) EP1835317B1 (zh)
JP (1) JP4891812B2 (zh)
CN (2) CN101852887A (zh)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080138011A1 (en) * 2006-10-26 2008-06-12 Furukawa Electric North America, Inc. Production of optical pulses at a desired wavelength utilizing higher-order-mode (HOM) fiber
US20100103959A1 (en) * 2007-02-05 2010-04-29 Furukawa Electric North America, Inc. Selectively Pumping A Gain-Doped Region Of An Optical Fiber
US20100271689A1 (en) * 2009-04-23 2010-10-28 Ofs Fitel, Llc Spatial filtering of higher order modes in multimode fibers
WO2012118937A3 (en) * 2011-03-01 2013-11-14 Ofs Fitel, Inc Method and system for ultrashort pulse fiber delivery using higher order mode fiber
WO2013169626A1 (en) * 2012-05-05 2013-11-14 Trustees Of Boston University High-power fiber laser employing nonlinear wave mixing with higher-order modes
US20140254616A1 (en) * 2011-10-06 2014-09-11 OIFS Fitel, LLC Fiber Designs For Wavelength Tunable Ultra-Short Pulse Lasers
JP2014527301A (ja) * 2011-08-10 2014-10-09 オーエフエス ファイテル，エルエルシー モード変換を用いる少モード化ファイバデバイス
US20180335564A1 (en) * 2017-05-19 2018-11-22 Ofs Fitel, Llc Optical fiber with specialized figure-of-merit and applications therefor

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8270786B2 (en) * 2008-11-21 2012-09-18 Ofs Fitel, Llc Optical fiber mode couplers
US8478134B2 (en) * 2009-08-31 2013-07-02 Ofs Fitel, Llc Compression of generated optical continuum utilizing higher-order-mode fiber
US8507877B2 (en) 2009-11-25 2013-08-13 Ofs Fitel, Llc Non-linear optical system and techniques
JP5729982B2 (ja) * 2009-11-25 2015-06-03 オーエフエス ファイテル，エルエルシー 非線形光システム及び技術
JP2014509412A (ja) * 2011-02-24 2014-04-17 オーエフエス ファイテル，エルエルシー 空間多重化のためのマルチコア・ファイバ設計
US8804233B2 (en) * 2011-08-09 2014-08-12 Ofs Fitel, Llc Fiber assembly for all-fiber delivery of high energy femtosecond pulses
CN102904641B (zh) * 2012-10-17 2015-07-08 江西省电力公司信息通信分公司 一种基于少模光纤的通信系统
CN105445853B (zh) * 2016-01-28 2018-08-28 国网江西省电力公司信息通信分公司 一种少模光纤

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5802236A (en) * 1997-02-14 1998-09-01 Lucent Technologies Inc. Article comprising a micro-structured optical fiber, and method of making such fiber
US6097870A (en) * 1999-05-17 2000-08-01 Lucent Technologies Inc. Article utilizing optical waveguides with anomalous dispersion at vis-nir wavelenghts
US20020012498A1 (en) * 1998-03-26 2002-01-31 Yochay Danziger Transverse spatial mode transformer for optical communication
US6434309B1 (en) * 1999-02-22 2002-08-13 Corning Incorporated Laser optimized multimode fiber and method for use with laser and LED sources and system employing same
US6711327B2 (en) * 2000-12-30 2004-03-23 University Of Rochester Device and method for compensating for chromatic dispersion
US6724964B2 (en) * 2001-01-30 2004-04-20 Lasercomm Inc. Optical waveguide exhibiting strongly positive dispersion, and system utilizing same
US20040213513A1 (en) * 2003-04-25 2004-10-28 Alcatel Device and a method for transforming signal propagation mode by interference

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2790106B1 (fr) * 1999-02-18 2001-05-04 Cit Alcatel Fibre optique a saut d'indice a large bande
US6360045B1 (en) * 1999-02-23 2002-03-19 Lasercomm Inc. High order spatial mode transmission system
US6317549B1 (en) * 1999-05-24 2001-11-13 Lucent Technologies Inc. Optical fiber having negative dispersion and low slope in the Erbium amplifier region
US20020164140A1 (en) * 2000-01-12 2002-11-07 Michael Lysiansky Few-mode fiber profile
US6766088B2 (en) * 2000-05-01 2004-07-20 Sumitomo Electric Industries, Ltd. Optical fiber and method for making the same
US6792188B2 (en) * 2000-07-21 2004-09-14 Crystal Fibre A/S Dispersion manipulating fiber
US6937788B2 (en) * 2002-09-04 2005-08-30 Furukawa Electric North America Adjustable dispersion compensator with few mode fibers and switchable mode converters
US7103251B2 (en) * 2002-12-31 2006-09-05 Corning Incorporated Dispersion flattened NZDSF fiber
FR2864254B1 (fr) * 2003-12-23 2006-03-03 Cit Alcatel Fibre optique multimode hom a gestion de dispersion
US7280730B2 (en) * 2004-01-16 2007-10-09 Imra America, Inc. Large core holey fibers
US20080138011A1 (en) * 2006-10-26 2008-06-12 Furukawa Electric North America, Inc. Production of optical pulses at a desired wavelength utilizing higher-order-mode (HOM) fiber
JP4904241B2 (ja) * 2007-10-11 2012-03-28 古河電気工業株式会社 ホーリーファイバ
WO2009133634A1 (ja) * 2008-04-30 2009-11-05 古河電気工業株式会社 光ファイバおよび光学デバイス

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5802236A (en) * 1997-02-14 1998-09-01 Lucent Technologies Inc. Article comprising a micro-structured optical fiber, and method of making such fiber
US20020012498A1 (en) * 1998-03-26 2002-01-31 Yochay Danziger Transverse spatial mode transformer for optical communication
US6434309B1 (en) * 1999-02-22 2002-08-13 Corning Incorporated Laser optimized multimode fiber and method for use with laser and LED sources and system employing same
US6097870A (en) * 1999-05-17 2000-08-01 Lucent Technologies Inc. Article utilizing optical waveguides with anomalous dispersion at vis-nir wavelenghts
US6711327B2 (en) * 2000-12-30 2004-03-23 University Of Rochester Device and method for compensating for chromatic dispersion
US6724964B2 (en) * 2001-01-30 2004-04-20 Lasercomm Inc. Optical waveguide exhibiting strongly positive dispersion, and system utilizing same
US20040213513A1 (en) * 2003-04-25 2004-10-28 Alcatel Device and a method for transforming signal propagation mode by interference

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8290317B2 (en) 2006-10-26 2012-10-16 Ofs Fitel, Llc Production of optical pulses at a desired wavelength utilizing higher-order-mode (HOM) fiber
US20100054661A1 (en) * 2006-10-26 2010-03-04 Slddharth Ramachandran Production of optical pulses at a desired wavelength utilizing higher-order-mode (HOM) fiber
US20080138011A1 (en) * 2006-10-26 2008-06-12 Furukawa Electric North America, Inc. Production of optical pulses at a desired wavelength utilizing higher-order-mode (HOM) fiber
US8126299B2 (en) 2006-10-26 2012-02-28 Ofs Fitel, Llc Production of optical pulses at a desired wavelength utilizing higher-order-mode (HOM) fiber
US20100103959A1 (en) * 2007-02-05 2010-04-29 Furukawa Electric North America, Inc. Selectively Pumping A Gain-Doped Region Of An Optical Fiber
US8520299B2 (en) 2007-02-05 2013-08-27 OFS Fitec, LLC Selectively pumping a gain-doped region of an optical fiber
US8909017B2 (en) 2009-04-23 2014-12-09 Ofs Fitel, Llc Spatial filtering of higher order modes in multimode fibers
US8218928B2 (en) 2009-04-23 2012-07-10 Ofs Fitel, Llc Spatial filtering of higher order modes in multimode fibers
US20100271689A1 (en) * 2009-04-23 2010-10-28 Ofs Fitel, Llc Spatial filtering of higher order modes in multimode fibers
WO2012118937A3 (en) * 2011-03-01 2013-11-14 Ofs Fitel, Inc Method and system for ultrashort pulse fiber delivery using higher order mode fiber
JP2014527301A (ja) * 2011-08-10 2014-10-09 オーエフエス ファイテル，エルエルシー モード変換を用いる少モード化ファイバデバイス
EP2742377A4 (en) * 2011-08-10 2015-06-17 Ofs Fitel Llc FIBER DEVICE WITH FEW MODES AND MODUS CONVERSION
US20140254616A1 (en) * 2011-10-06 2014-09-11 OIFS Fitel, LLC Fiber Designs For Wavelength Tunable Ultra-Short Pulse Lasers
US9502852B2 (en) * 2011-10-06 2016-11-22 Ofs Fitel, Llc Fiber designs for wavelength tunable ultra-short pulse lasers
WO2013169626A1 (en) * 2012-05-05 2013-11-14 Trustees Of Boston University High-power fiber laser employing nonlinear wave mixing with higher-order modes
US9203209B2 (en) 2012-05-05 2015-12-01 Trustees Of Boston University High-power fiber laser employing nonlinear wave mixing with higher-order modes
US20180335564A1 (en) * 2017-05-19 2018-11-22 Ofs Fitel, Llc Optical fiber with specialized figure-of-merit and applications therefor
US10591667B2 (en) * 2017-05-19 2020-03-17 Ofs Fitel, Llc Optical fiber with specialized figure-of-merit and applications therefor
US10816720B2 (en) 2017-05-19 2020-10-27 Ofs Fitel, Llc Optical fiber with specialized figure-of-merit and applications therefor

Also Published As

Publication number Publication date
EP1835317A1 (en) 2007-09-19
CN101153938A (zh) 2008-04-02
US8189977B2 (en) 2012-05-29
EP1835317B1 (en) 2014-05-07
US20090034925A1 (en) 2009-02-05
JP2007241280A (ja) 2007-09-20
US8175435B2 (en) 2012-05-08
US20100014820A1 (en) 2010-01-21
CN101852887A (zh) 2010-10-06
US8175436B2 (en) 2012-05-08
JP4891812B2 (ja) 2012-03-07
US20080317419A1 (en) 2008-12-25

Similar Documents

Publication Publication Date Title
US8189977B2 (en) Optical fibers and optical fiber devices with total dispersion greater than material dispersion
JP5276021B2 (ja) 光ファイバの誘電破壊の防止
US7483612B2 (en) Large mode area fibers using higher order modes
US6792188B2 (en) Dispersion manipulating fiber
JP4460065B2 (ja) 非線形光ファイバおよび非線形光デバイスならびに光信号処理装置
US20080138011A1 (en) Production of optical pulses at a desired wavelength utilizing higher-order-mode (HOM) fiber
US7483614B2 (en) Optical fiber and optical device using the same
Matsuo et al. Recent progress on multi-core fiber and few-mode fiber
Kang et al. Design of four-mode erbium doped fiber amplifier with low differential modal gain for modal division multiplexed transmissions
JP5215699B2 (ja) フォトニック結晶ファイバ
JPH11344620A (ja) 広帯域長周期格子
EP1762868A1 (en) Optical fiber and optical device using the same
Choi et al. A new LP02 mode dispersion compensation scheme based on mode converter using hollow optical fiber
EP1858128B1 (en) Large mode area fibers by using conversion to higher order modes
Grüner-Nielsen et al. Optimization of higher order mode fibers for dispersion management of femtosecond fiber lasers
US9502852B2 (en) Fiber designs for wavelength tunable ultra-short pulse lasers
Ramachandran et al. Scaling to ultra-large-A eff using higher-order-mode fibers
Shao et al. Numerical analysis of large mode area segmented cladding fibers
Huttunen Analysis and optimization of photonic crystal components for optical telecommunications

Legal Events

Date Code Title Description
STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION