公开(公告)号：US07155095B2

公开(公告)日：2006-12-26

申请号：US10331565

申请日：2002-12-31

Applicant: Osamu Aso ,  Masateru Tadakuma ,  Shu Namiki

Inventor： Osamu Aso ,  Masateru Tadakuma ,  Shu Namiki

IPC: G02B6/02

CPC classification number: G02F1/3536 ,  G02B6/2766 ,  G02F2201/02

Abstract: The present invention provides a method for generating four-wave mixing to obtain idler light with high efficiency, in which the range of lengths of an optical fiber is appropriately set, and probe light and pumping light, having different frequencies, are launched into the optical fiber. When the nonlinear coefficient of the optical fiber, the loss per unit distance, and the wavelength and intensity of the probe light and pumping light are set to certain values, the idler light conversion efficiency at the output end of the optical fiber is a periodic function of an optical fiber having a maximal value and a minimal value. The maximum length of the optical fiber to be used to obtain four-wave mixing is set to be equal to or less than the length Lmax (Lmax=Lm+ΔL) which is given by adding the length of the optical fiber Lm, at which the idler light conversion efficiency takes on the first maximal value in the aforementioned periodic function and distance ΔL or 10% of L.

Abstract translation: 本发明提供了一种用于产生四波混频的方法，以高效率获得惰性光，其中适当地设置光纤的长度范围，并且将具有不同频率的探测光和泵浦光发射到光学 纤维。 当光纤的非线性系数，每单位距离的损耗以及探测光和泵浦光的波长和强度被设置为一定值时，光纤输出端的惰轮光转换效率是周期性函数 具有最大值和最小值的光纤。 用于获得四波混频的光纤的最大长度被设定为等于或小于通过将光纤Lm的长度相加给出的长度Lmax（Lmax = Lm +ΔLL），其中， 空转光转换效率在上述周期函数和距离DeltaL或L的10％处于第一最大值。

公开(公告)号：US20060251424A1

公开(公告)日：2006-11-09

申请号：US11417093

申请日：2006-05-03

Applicant: Jeffrey Nicholson ,  Paul Westbrook

Inventor： Jeffrey Nicholson ,  Paul Westbrook

IPC: H04B10/12

CPC classification number: G02F1/365 ,  G02F2/002 ,  G02F2201/02 ,  G02F2201/307 ,  G02F2203/56

Abstract: An arrangement for generating beat notes with a relatively high signal-to-noise ratio (SNR) utilizes a pulsed laser source coupled into a section of post-processed highly-nonlinear optical fiber (HNLF) to generate a frequency comb having one or more regions of enhanced spectral power. A second laser signal source is overlapped with the frequency comb to form one or more “beat notes” at difference frequencies(y) between the second source and the continuum comb. By virtue of the post-processing, areas of spectral enhancement are formed along the comb, and are positioned to interact with the second laser signal to generate optical beat notes. The second laser signal may be from an external source (forming beat notes from a signal “outside” of the comb), or may be a frequency-multiplied version of the generated supercontinuum (forming beat notes from a signal “within” the comb).

Abstract translation: 用于产生具有相对高的信噪比（SNR）的节拍的装置利用耦合到后处理的高非线性光纤（HNLF）的一部分中的脉冲激光源来产生具有一个或多个区域 的增强光谱功率。 第二激光信号源与频率梳重叠，以在第二源和连续梳之间的差频（y）处形成一个或多个“拍音”。 通过后处理，沿着梳状物形成光谱增强的区域，并且被定位成与第二激光信号相互作用以产生光学拍音。 第二激光信号可以来自外部源（从梳状物的“外部”的信号形成节拍音符），或者可以是所生成的超连续谱的倍频版本（从“梳”内的信号形成节奏音符） 。

公开(公告)号：US07003180B2

公开(公告)日：2006-02-21

申请号：US10472076

申请日：2002-03-15

Applicant: David John Richardson ,  Ju Han Lee ,  Morten Ibsen ,  Periklis Petropoulos ,  Peh Choing Teh

Inventor： David John Richardson ,  Ju Han Lee ,  Morten Ibsen ,  Periklis Petropoulos ,  Peh Choing Teh

IPC: G02F1/01

CPC classification number: H04B10/2507 ,  G02F1/3515 ,  G02F2201/02 ,  G02F2201/307

Abstract: Apparatus for providing timing jitter tolerant optical modulation of a first signal by a second signal, the first signal having a first wavelength, the second signal including a plurality of second signal pulses having a second pulse shape and a second wavelength. The apparatus includes a first signal input port, a second signal input port, a coupler, a grating and a non-linear optical device. The apparatus is configured to direct the second signal at the second signal input port to the non-linear optical device via the coupler and the grating, and to direct the first signal at the first signal input port to the non-linear optical device. The grating is a superstructured fibre Bragg grating that converts the second signal pulses into intermediary pulses each having an intermediary pulse shape. The intermediary pulse shape is such that it provides a switching window within the non-linear optical device.

Abstract translation: 用于通过第二信号提供对第一信号的定时抖动容忍光调制的装置，所述第一信号具有第一波长，所述第二信号包括具有第二脉冲形状和第二波长的多个第二信号脉冲。 该装置包括第一信号输入端口，第二信号输入端口，耦合器，光栅和非线性光学装置。 该装置被配置为经由耦合器和光栅将第二信号输入端口处的第二信号引导到非线性光学装置，并将第一信号输入端口处的第一信号引导到非线性光学装置。 光栅是将第二信号脉冲转换成具有中间脉冲形状的中间脉冲的超结构光纤布拉格光栅。 中间脉冲形状使得其在非线性光学装置内提供开关窗口。

公开(公告)号：US06879433B1

公开(公告)日：2005-04-12

申请号：US10332028

申请日：2000-10-03

Applicant: Shinji Yamashita ,  Kenichi Torii

Inventor： Shinji Yamashita ,  Kenichi Torii

IPC: G02F1/365 ,  G02F1/21 ,  G02F1/35 ,  G02F2/02 ,  G02B6/00

CPC classification number: G02F1/3536 ,  G02F2001/211 ,  G02F2201/02 ,  G02F2203/06

Abstract: A wavelength converter which employs an optical fiber and has high converter efficiency. The polarization planes of a signal light and an exciting light outputted from a laser diode (LD) (103) are respectively controlled by polarization controllers (PC's) (101 and 104) and the phases of the lights are respectively modulated by phase modulators (PM's) (102 and 105) in accordance with modulation signals outputted form an oscillator (110). Then, the output lights form the PM's (102 and 105) are multiplexed by a coupler (106). After the multiplexed signal light and exciting light are amplified by an optical amplifier (EDFA) (107), they are imputed to a dispersion shift fiber (DSP) (108). After wavelength transformation (four light waves mixing (FWM) is practiced in the DSP, and FWM light is outputted through a band-pass filter (BPF) (109).

Abstract translation: 一种采用光纤并具有高转换效率的波长转换器。 由激光二极管（LD）（103）输出的信号光和激发光的偏振面分别由偏振控制器（PC）（101和104）控制，光的相位分别由相位调制器（PM） ）（102和105），根据从振荡器（110）输出的调制信号。 然后，PM（102和105）的输出光由耦合器（106）复用。 多路信号光和激发光由光放大器（EDFA）（107）放大后，它们被归入色散位移光纤（DSP）（108）。 在波长变换（在四个光波混合（FWM））中实施，并且通过带通滤波器（BPF）（109）输出FWM光。

公开(公告)号：US06847742B2

公开(公告)日：2005-01-25

申请号：US09811146

申请日：2001-03-15

Applicant: Wayne V. Sorin

Inventor： Wayne V. Sorin

IPC: G02B6/02 ,  G02B6/14 ,  G02B6/255 ,  G02B6/26 ,  G02B6/34 ,  G02F1/125 ,  H04J14/02 ,  G02F1/335

CPC classification number: H04J14/0221 ,  G02B6/02047 ,  G02B6/02071 ,  G02B6/14 ,  G02B6/2552 ,  G02B6/266 ,  G02B6/29344 ,  G02B6/29383 ,  G02B6/29391 ,  G02B6/29395 ,  G02F1/125 ,  G02F2201/02 ,  G02F2203/055 ,  H04J14/0212 ,  H04J14/0217

Abstract: A dynamic gain flattening filter includes a first filter stage. The first filter stage has a first tunable coupling member and a first differential delay with first and second tunable delay paths. The first tunable coupling member adjusts an amount of power of the optical signal that is divided onto the first and second tunable delay paths of the first differential delay.

Abstract translation: 动态增益平坦滤波器包括第一滤波器级。 第一滤波器级具有第一可调谐耦合构件和具有第一和第二可调延迟路径的第一差分延迟。 第一可调耦合部件调节被分割到第一差分延迟的第一和第二可调延迟路径上的光信号的功率量。

公开(公告)号：US20040240815A1

公开(公告)日：2004-12-02

申请号：US10449970

申请日：2003-05-30

Inventor： Dmitri V. Kuksenkov ,  Ming-Jun Li ,  Daniel A. Nolan

IPC: G02B006/02

CPC classification number: G02B6/03627 ,  C03B37/01446 ,  C03B37/0146 ,  C03B2201/12 ,  C03B2201/31 ,  C03B2203/22 ,  C03B2203/36 ,  G02B6/02028 ,  G02B6/02271 ,  G02B6/0281 ,  G02F1/365 ,  G02F2201/02

Abstract: The present invention comprises an optical fiber have a small effective area and a positive dispersion suitable for use in the reshaping and regeneration of optical signals. The optical fiber according to the present invention has an effective area between about 10 nullm2 and 16 nullm2, and a total dispersion between about 4 ps/nm/km and 8 ps/nm/km. Also disclosed is a method of making the inventive fiber wherein a high core relative refractive index can be achieved.

Abstract translation: 本发明包括光纤具有小的有效面积和适合用于光信号重塑和再生的正色散。 根据本发明的光纤具有在约10mum 2和16mum 2之间的有效面积，以及在约4ps / nm / km至8ps / nm / km之间的总色散。 还公开了制造本发明的纤维的方法，其中可以实现高芯相对折射率。

公开(公告)号：US06804441B2

公开(公告)日：2004-10-12

申请号：US10207020

申请日：2002-07-30

Applicant: Shinichi Arai ,  Naoto Oyama ,  Hirofumi Saito

Inventor： Shinichi Arai ,  Naoto Oyama ,  Hirofumi Saito

IPC: G02B622

CPC classification number: G02B6/0365 ,  G02B6/02242 ,  G02B6/02247 ,  G02B6/02276 ,  G02B6/0286 ,  G02B6/03627 ,  G02B6/105 ,  G02F1/353 ,  G02F1/365 ,  G02F2201/02 ,  H01S3/0672 ,  H01S3/06729 ,  H01S3/06754 ,  H01S3/302

Abstract: An optical fiber comprising a core and a cladding region which covers an outer periphery of the core, having a zero-dispersion wavelength in a wavelength range of 1.4 &mgr;m to 1.65 &mgr;m, and being in a single mode in that zero-dispersion wavelength, wherein GeO2 is doped in the core in a quantity such that a relative refractive index difference of the core becomes not less than 1.8%, the cladding region includes first, second, and third cladding regions, and a refractive index of the second cladding region is smaller than those of the first cladding region and the third cladding region.

Abstract translation: 一种光纤，其包括芯和覆盖所述芯的外周的包层区域，其具有在1.4μm至1.65μm的波长范围内的零色散波长，并且处于零色散波长的单一模式，其中 GeO2以芯的相对折射率差成为1.8％以上的量掺杂在芯中，包层区域包括第一，第二和第三包层区域，第二包层区域的折射率变小 比第一包层区域和第三包层区域的区域。

公开(公告)号：US06788834B2

公开(公告)日：2004-09-07

申请号：US10253184

申请日：2002-09-24

Applicant: Alexei Andreevich Pokrovski ,  Boris Sergeevich Pavlov ,  Lev Vassilievich Prokhorov

Inventor： Alexei Andreevich Pokrovski ,  Boris Sergeevich Pavlov ,  Lev Vassilievich Prokhorov

IPC: G06F1295

CPC classification number: G02F1/0134 ,  G02F2201/02

Abstract: In a tunable optoacoustic filter, a portion of the optical fiber is coiled around and placed at least partially against a rounded shell equipped with at least one longitudinal slit having an emitter and an absorber on both sides of the slit in contact with the shell or the optical fiber. The emitter transmits elastic waves along the shell and therefore along the fiber to the point of absorber. Coiled configuration of the optical fiber along with various positions of emitters and absorbers are presented allowing to widen the functional range of operation of the filter by increasing the usable length of the optical fiber subject to acoustic oscillations. As a result a reflection/conversion coefficient of up to 0.999 and the filtration band of 1-10 kHz are obtainable.

Abstract translation: 在可调光声滤波器中，光纤的一部分被卷绕在周围并且至少部分地抵靠装配有至少一个纵向狭缝的圆形壳体，所述纵向狭缝具有在与壳体接触的狭缝的两侧上的发射器和吸收体，或 光纤。 发射器沿着壳体发射弹性波，因此沿着光纤传播到吸收点。 提出了光纤的卷绕结构以及发射器和吸收体的各种位置，允许通过增加受到声振荡的光纤的可用长度来扩大滤波器的功能范围。 结果可获得高达0.999的反射/转换系数和1-10kHz的过滤带。

公开(公告)号：US20040170357A1

公开(公告)日：2004-09-02

申请号：US10480459

申请日：2003-12-12

Inventor： Yoshihiro Takiguchi ,  Kensaku Itoh

IPC: G02B006/26

CPC classification number: G02F1/0131 ,  B82Y20/00 ,  G02B6/1225 ,  G02F2201/02

Abstract: An end face 7a of an optical fiber 7 and an end face 8a of an optical fiber 8 are arranged so as to have a predetermined interval and to oppose each other in a V-groove 23 of a base 21. A solution 27 including particles used as a material of the photonic crystal is dropped into a space section 25 which is formed by the end face 7a, the end face 8a, and the V-groove 23. Accordingly, by growing the photonic crystal from each of the end face 7a and the end face 8a, the optical control section including the photonic crystal 2 is formed on each of the end face 7a and the end face 8a.

Abstract translation: 光纤7的端面7a和光纤8的端面8a布置成具有预定间隔并且在基座21的V形槽23中彼此相对。包括使用的颗粒的溶液27 因为光子晶体的材料落入由端面7a，端面8a和V形槽23形成的空间部分25中。因此，通过从端面7a和 端面8a，包括光子晶体2的光学控制部分形成在端面7a和端面8a中的每一个上。

公开(公告)号：US06775447B2

公开(公告)日：2004-08-10

申请号：US10251464

申请日：2002-09-20

Applicant: Jeffrey W. Nicholson ,  Man Fei Yan

Inventor： Jeffrey W. Nicholson ,  Man Fei Yan

IPC: G02B600

CPC classification number: H04B10/506 ,  G02B6/2746 ,  G02B6/29377 ,  G02F1/365 ,  G02F2001/3528 ,  G02F2201/02

Abstract: An optical fiber suitable for generation of a supercontinuum spectrum when light pulses of femtosecond (10−15 sec.) duration are launched at a certain wavelength into the fiber. The fiber includes a number of sections of highly non-linear fiber (HNLF) wherein each section exhibits a different dispersion at the wavelength of the launched light pulses. The fiber sections are joined, for example, by fusion splicing the sections in series with one another so that the dispersions of the sections decrease from an input end to an output end of the fiber. In the disclosed embodiment, a low noise, coherent supercontinuum spanning more than one octave is generated at the output end of the fiber when pulses of light of 188 fs duration are launched into the fiber at a repetition rate of 33 MHz and with an energy of three nanojoules per pulse.

Abstract translation: 当光子脉冲（10-15秒）的光脉冲以一定波长发射到光纤中时，适用于产生超连续谱光谱的光纤。 光纤包括多个高度非线性光纤（HNLF）的部分，其中每个部分在所发射的光脉冲的波长处呈现不同的色散。 纤维部分例如通过将这些部分彼此串联进行熔接来连接，使得部分的分散体从纤维的输入端到输出端减小。 在所公开的实施例中，在光纤的输出端产生跨越多于一个八度的低噪声，相干超连续谱，其中188fs持续时间的光以33MHz的重复速率发射到光纤中，并且以 每脉冲三纳克。