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    • 3. 发明申请
    • ALL FIBER CHIRPED PULSE AMPLIFICATION SYSTEM AND METHOD
    • 所有光纤激光放大系统和方法
    • WO2008121273A2
    • 2008-10-09
    • PCT/US2008/003892
    • 2008-03-25
    • CORNING INCORPORATEDKUKSENKOV, Dmitri VLI, Shenping
    • KUKSENKOV, Dmitri VLI, Shenping
    • H01S3/0057G02B6/02304H01S3/06712H01S3/06725H01S3/06754H01S3/2308
    • An all-fiber chirped pulse amplification (CPA) system and method is provided that utilizes a hollow core photonic bandgap fiber as a pulse compressor and a dispersion compensating optical fiber as a pulse stretcher that are matched with respect to both the amount and slope of dispersion to avoid peak power-limiting pulse distortion. The CPA system includes a rare earth ion-doped optical fiber amplifier having an input and an output that amplifies optical pulses having a center wavelength of ?c, a pulse compressing length L1 of hollow core photonic bandgap fiber having a dispersion value D1 and a dispersion slope S1 that varies over a wavelength ? of the pulses that is optically connected to the output of the fiber amplifier and having a k-parameter defined by a ratio of D1 over the slope of the function D1(?) that is larger than about 50, and a pulse stretching length L2 of dispersion compensating optical fiber connected to the input of the fiber amplifier having a dispersion value D2 and dispersion slope S2. The lengths are selected such that L1D1 = -L2D2, and the center wavelength ?c of the inputted optical pulses is preferably close to the center wavelength of the bandgap of the photonic bandgap fiber.
    • 提供了全光纤啁啾脉冲放大(CPA)系统和方法,其利用空心光子带隙光纤作为脉冲压缩器和色散补偿光纤作为脉冲展宽器,其相对于色散的量和斜率都相匹配 以避免峰值功率限制脉冲失真。 CPA系统包括具有放大具有中心波长λc的光脉冲的输入和输出的稀土离子掺杂光纤放大器,具有色散值D1的空心光子带隙光纤的脉冲压缩长度L1和色散 斜率S1在波长上变化? 光学连接到光纤放大器的输出的脉冲,并且具有由大于约50的函数D1(θ)的斜率上的D1的比率定义的k参数以及大于约50的脉冲拉伸长度L2 色散补偿光纤连接到具有色散值D2和色散斜率S2的光纤放大器的输入。 选择长度使得L1D1 = -L2D2,并且输入的光脉冲的中心波长λc优选接近于光子带隙光纤的带隙的中心波长。
    • 7. 发明申请
    • SYSTEM FOR PASSIVE SCRAMBLING AND UNSCRAMBLING OF AN OPTICAL SIGNAL
    • 被动扫描系统和光信号的解码
    • WO2008143982A1
    • 2008-11-27
    • PCT/US2008/006300
    • 2008-05-16
    • CORNING INCORPORATEDKUKSENKOV, Dmitri, V.LI, ShenpingNOLAN, Daniel, A.
    • KUKSENKOV, Dmitri, V.LI, ShenpingNOLAN, Daniel, A.
    • H04B10/13H04L9/00
    • H04B10/85H04B10/2581
    • A system for passively scrambling and unscrambling a, pulse optical signal transmitted through a multi-mode optical fiber is provided. The system includes a scrambling unit connected between a signal receiving end of said transmission fiber and an optical signal source that includes an optical fiber which creates a differential delay between two groups of optical modes of the signal that is at least one bit period long such that said optical signal is passively scrambled, and an unscrambling unit connected to a signal transmitting end of said transmission fiber having an optical fiber that counteracts said differential delay between said two groups of optical modes of the signal such that said optical signal is passively unscrambled. The scrambling unit optical fiber has an alpha profile with a complementary perturbation that creates the differential delay between two groups of optical modes of the signal, and the unscrambling unit optical fiber has an alpha profile with reversal complementary perturbation that counteracts the differential delay between said two groups of optical modes of the signal. Alternatively, the scrambling and unscrambling units may have the combination of a mode splitter that splits the signal into two different groups of optical modes, and a pair of optical fibers that conduct the two groups of optical modes in parallel, the fibers being of different lengths to create or to counteract a differential delay in the two groups of modes.
    • 提供一种用于被动加扰和解扰通过多模光纤传输的脉冲光信号的系统。 该系统包括连接在所述传输光纤的信号接收端和光信号源之间的加扰单元,所述光信号源包括光纤,该光纤在至少一位周期长的信号的两组光模之间产生差分延迟,使得 所述光信号被无源加扰,并且一个解扰单元连接到具有光纤的所述传输光纤的信号发送端,该光纤抵消所述信号的所述两组光模之间的所述差分延迟,使得所述光信号被被动地解扰。 加扰单元光纤具有具有互补扰动的α分布,其产生信号的两组光模式之间的差分延迟,并且解扰单元光纤具有反转互补扰动的α分布,其抵消所述两个 信号组的光模式。 或者,加扰和解扰单元可以具有将信号分解成两个不同组的光模式的模式分离器的组合,以及并行地传导两组光学模式的一对光纤,所述光纤具有不同长度 以创建或抵消两组模式中的差分延迟。
    • 10. 发明申请
    • OPTICAL FIBER LIGHT SOURCE BASED ON THIRD-HARMONIC GENERATION
    • 基于三次谐波生成的光纤光源
    • WO2008106113A1
    • 2008-09-04
    • PCT/US2008/002495
    • 2008-02-26
    • CORNING INCORPORATEDBERKEY, George, E.LI, Ming-junLI, ShenpingNOLAN, Daniel, A.
    • BERKEY, George, E.LI, Ming-junLI, ShenpingNOLAN, Daniel, A.
    • G02F1/35
    • G02F1/3536G02B6/03605G02B6/03644G02F1/365G02F2001/354
    • An optical-fiber-based light source that generates light via third-harmonic (TH) generation is disclosed. The light source includes a pump light source that provides pump light having a fundamental mode of wavelength λp. The light source also includes an optical fiber optically coupled to the pump light source. The optical fiber's core refractive index profile has (i) a central region with a refractive index value Δ 1 , (ii) a first annular region immediately surrounding the central region and having a refractive index value Δ 2 , and (iii) a second annular region immediately surrounding the first annular region and having a refractive index value Δ 3 . The optical fiber satisfies the conditions Δ 2 1 and Δ 2 3 , and max{Δ 1 , Δ 3 } - Δ 2 > 1.2%. The pump light produces TH-generated light having a higher-order mode of wavelength λ TH = (1/3) λ ρ and that is outputted at the optical fiber output end. The pump light fundamental mode overlaps the TH-generated-light higher order mode over the length of the optical fiber to provide a conversion efficiency of 1% or greater.
    • 公开了一种通过三次谐波(TH)产生光产生光的基于光纤的光源。 光源包括提供具有基本波长λp的泵浦光的泵浦光源。 光源还包括光学耦合到泵浦光源的光纤。 光纤的纤芯折射率分布具有(i)具有折射率值α1的中心区域,(ii)直接围绕中心区域并具有折射率值α 2 ,和(iii)紧邻第一环形区域并具有折射率值β3的第二环形区域。 光纤满足条件α2α2α3和α2 2 3α3和最大{β2 2%,1%,3%〜3%。 泵浦光产生具有较高阶波长模式的TH产生的光,其在光纤输出端输出(1/3)→ 。 泵浦光基本模式在光纤长度上与TH生成光高阶模式重叠,以提供1%或更大的转换效率。