公开(公告)号：US06282015B1

公开(公告)日：2001-08-28

申请号：US09067191

申请日：1998-04-27

申请人： Yoshiyasu Ueno ,  Kazuhito Tajima

发明人： Yoshiyasu Ueno ,  Kazuhito Tajima

IPC分类号： G02F1365

CPC分类号： G02F2/004 ,  G02F2001/212

摘要： A wavelength converter which has simple configuration and can be easily controlled and operated with stability, and used for a long-distance mass optical communication, comprises a waveguide for causing a change of a nonlinear refractive index. The converter includes a delay interference circuit having two optical paths and of different optical path lengths. A CW light source is input into the waveguide. A coherent length determined by a spectral line width of CW light output from the CW light source is longer than an optical path difference between the two optical paths in the delay interference circuit.

摘要翻译： 具有简单结构并且可以容易地控制和稳定操作并用于长距离质量光通信的波长转换器包括用于引起非线性折射率变化的波导。 该转换器包括具有两条光路和不同光程长度的延迟干扰电路。 CW光源被输入到波导中。 由CW光源输出的CW光的谱线宽度确定的相干长度大于延迟干扰电路中的两个光路之间的光程差。

公开(公告)号：US5448584A

公开(公告)日：1995-09-05

申请号：US223784

申请日：1994-04-06

申请人： Yoshiyasu Ueno

发明人： Yoshiyasu Ueno

IPC分类号： H01S5/00 ,  H01S3/109 ,  H01S5/042 ,  H01S5/06 ,  H01S5/32 ,  H01S5/343 ,  H01S3/18

CPC分类号： H01S5/34313 ,  B82Y20/00 ,  H01S5/0605 ,  H01S5/223 ,  H01S5/3211

摘要： A semiconductor laser with a semiconductor multilayer has at least one double heterostructure. There area pair of cladding layers and an active layer and, where a bandgap energy of the cladding layers is E.sub.1 and that of the active layer is E.sub.2, these bandgap energies satisfy a relation substantially E.sub.1 .gtoreq.2.times.E.sub.2. The semiconductor laser produces green SHG (second harmonic generation) light and the efficiency of producing such light is high because the cladding layers absorb substantially no SHG light.

摘要翻译： 具有半导体多层的半导体激光器具有至少一个双异质结构。 存在一对包覆层和有源层，并且其中包层的带隙能为E1，有源层的带隙能为E2，这些带隙能量基本上满足大致E1> / = 2xE2的关系。 半导体激光器产生绿色SHG（二次谐波产生）光，并且由于包层基本上不吸收SHG光而产生这种光的效率高。

公开(公告)号：US07010235B2

公开(公告)日：2006-03-07

申请号：US10060324

申请日：2002-02-01

申请人： Yoshiyasu Ueno

发明人： Yoshiyasu Ueno

IPC分类号： H04B10/02

CPC分类号： H04B10/299

摘要： A system for all-optical signal regeneration is provided, which makes it possible to exhibit desired intensity noise suppressing function with respect to pulsed input signal light without increasing the injection current of semiconductor optical amplifiers even if the magnitude of nonlinear phase shift of the input signal light is less than π. The output light of the first delay interference unit is subjected to phase shift in the first nonlinear semiconductor waveguide and then, applied to the second delay interference unit along with the clock light. In the second delay interference unit, the first interfered light is generated from the output light while the second interfered light is generated from the clock light having an opposite logic to the input light. The second interfered light is subjected to phase shift by the first interfered light in the second nonlinear semiconductor waveguide and then, applied to the third delay interference unit. The third interfered light having an opposite logic to the input light is generated from the second interfered light in the third delay interference unit. The third interfered light is the output light of the system.

公开(公告)号：US06498675B2

公开(公告)日：2002-12-24

申请号：US09781351

申请日：2001-02-12

申请人： Yoshiyasu Ueno ,  Kazuhito Tajima

发明人： Yoshiyasu Ueno ,  Kazuhito Tajima

IPC分类号： G02F1365

CPC分类号： G02F2/004 ,  G02F2001/212

摘要： A wavelength converter which has simple configuration and can be easily controlled and operated with stability, and used for a long-distance mass optical communication, comprises a waveguide for causing a change of a nonlinear refractive index. The converter includes a delay interference circuit having two optical paths and of different optical path lengths. A CW light source is input into the waveguide. A coherent length determined by a spectral line width of CW light output from the CW light source is longer than an optical path difference between the two optical paths in the delay interference circuit.

摘要翻译： 具有简单结构并且可以容易地控制和稳定操作并用于长距离质量光通信的波长转换器包括用于引起非线性折射率变化的波导。 该转换器包括具有两条光路和不同光程长度的延迟干扰电路。 CW光源被输入到波导中。 由CW光源输出的CW光的谱线宽度确定的相干长度大于延迟干扰电路中的两个光路之间的光程差。

公开(公告)号：US5815628A

公开(公告)日：1998-09-29

申请号：US633882

申请日：1996-04-17

申请人： Yoshiyasu Ueno

发明人： Yoshiyasu Ueno

IPC分类号： G02B6/10

CPC分类号： G02F1/3556 ,  B82Y20/00 ,  G02F1/377 ,  G02F1/3544 ,  H01S5/0092

摘要： Disclosed is a novel combination of a particular class of semiconductors with a particular waveguide structure, realizing a practically efficient optical semiconductor device. The class of material used is ordered semiconductors, examples of which are GaInP and AlGaInP in which atomic-layer superlattices are formed. These superlattices are demonstrated to be useful with respect to a particular nonlinear mechanism, by combining with a particular waveguide structure known as a quasi-phase matching structure. The device disclosed is particularly useful for being utilized as a light switch and a light-wavelength converter used for ultrafast optical communication.

摘要翻译： 公开了特定类型的半导体与特定波导结构的新颖组合，实现了实际有效的光学半导体器件。 使用的材料类是有序半导体，其实例是形成原子层超晶格的GaInP和AlGaInP。 通过与称为准相位匹配结构的特定波导结构结合，这些超晶格被证明对于特定的非线性机制是有用的。 所公开的装置特别适用于用作光开关和用于超快光通信的光波长转换器。

公开(公告)号：US5309466A

公开(公告)日：1994-05-03

申请号：US932940

申请日：1992-08-21

申请人： Yoshiyasu Ueno ,  Hiroaki Fujii ,  Akiko Gomyo

发明人： Yoshiyasu Ueno ,  Hiroaki Fujii ,  Akiko Gomyo

IPC分类号： H01S5/183 ,  H01S5/223 ,  H01S5/32 ,  H01S5/323 ,  H01S5/34 ,  H01S5/343 ,  H01S3/19

CPC分类号： B82Y20/00 ,  H01S5/18308 ,  H01S2301/14 ,  H01S5/18355 ,  H01S5/2059 ,  H01S5/2231 ,  H01S5/3201 ,  H01S5/3202 ,  H01S5/3403 ,  H01S5/3404 ,  H01S5/34326

摘要： In a semiconductor laser, an active layer includes a semiconductor layer having the ordered structure along the [-1,1,1] direction or along the [1,-1,1] direction. By the action of the ordered structure, the electric vector of the recombination light generated in the active layer is concentrated in the (-1,1,1) plane or the (1,-1,1) plane. Alternatively, the semiconductor layer has not only the ordered structure along the [-1,1,1] direction or along the [1,-1,1] direction, but also the compressive strain in the (0,0,1) plane. By the action of the ordered structure and the compressive strain, the recombination light generated in the active layer is emitted in the (1,1,0) plane. As a result, the recombination light effectively gives a gain to the oscillation mode. Thus, the oscillation threshold current of the semiconductor laser is reduced, and the laser characteristics is improved.

摘要翻译： 在半导体激光器中，有源层包括具有沿[-1,1,1]方向或沿[1，-1,1]方向的有序结构的半导体层。 通过有序结构的作用，在有源层中产生的复合光的电矢量集中在（-1,1,1）面或（1，-1,1）面。 或者，半导体层不仅具有沿[-1,1,1]方向或沿[1，-1,1]方向的有序结构，而且还具有（0,0,1）平面中的压缩应变 。 通过有序结构和压缩应变的作用，在有效层中产生的复合光在（1,1,0）平面内发射。 结果，复合光有效地提供了振荡模式的增益。 因此，半导体激光器的振荡阈值电流降低，激光特性提高。

公开(公告)号：US06323992B1

公开(公告)日：2001-11-27

申请号：US09342445

申请日：1999-06-29

申请人： Yoshiyasu Ueno

发明人： Yoshiyasu Ueno

IPC分类号： G02F1365

CPC分类号： G02F2/004 ,  G02F1/365 ,  H01S5/5054

摘要： To a first nonlinear waveguide and a second nonlinear waveguide each having a refractive index which varies in response to the input of an optical signal, input optical signal pulses are inputted together with continuous light of a predetermined wave length said input optical signal pulses being caused to have a time delay corresponding to 0.6˜1.2 times the pulse width of said input optical signal pulses. Then, the phase of an optical signal outputted from the second nonlinear waveguide is adjusted to a predetermined amount with respect to the phase of an optical signal outputted from the first nonlinear waveguide, and the optical signal outputted from the first nonlinear waveguide and an output signal outputted from the second nonlinear waveguide are coupled, whereafter a wavelength component of the input optical signal pulse is removed from the coupled optical signal. Consequently, an output optical signal pulse of a wavelength different from that of the input optical signal pulse can be obtained while little wavelength chirping is generated.

摘要翻译： 对于具有响应于光信号的输入而变化的折射率的第一非线性波导和第二非线性波导，输入光信号脉冲与预定波长的连续光一起输入，所述输入光信号脉冲被引导到 具有对应于所述输入光信号脉冲的脉冲宽度的0.6〜1.2倍的时间延迟。 然后，从第二非线性波导输出的光信号的相位相对于从第一非线性波导输出的光信号的相位被调整为规定量，从第一非线性波导输出的光信号和输出信号 耦合从第二非线性波导输出的输入光信号脉冲的波长分量从耦合光信号中去除。 因此，可以获得与输入光信号脉冲不同的波长的输出光信号脉冲，同时产生少量波长啁啾。

公开(公告)号：US06285700B1

公开(公告)日：2001-09-04

申请号：US09212473

申请日：1998-12-16

申请人： Yoshiyasu Ueno ,  Hiroaki Chida

发明人： Yoshiyasu Ueno ,  Hiroaki Chida

IPC分类号： H10S500

CPC分类号： H01S5/028

摘要： A semiconductor laser capable of producing a high optical output has a coating film applied to an exit end. The coating film has a refractive index (n1) which is large compared with the refractive index (neff) of a semiconductor waveguide. The refractive index (n1) and the refractive index (neff) satisfy the relationship: n12>neff.

摘要翻译： 能够产生高光输出的半导体激光器具有施加到出射端的涂膜。 涂膜具有与半导体波导的折射率（neff）相比大的折射率（n1）。 折射率（n1）和折射率（neff）满足关系：n12> neff。

公开(公告)号：US06337762B1

公开(公告)日：2002-01-08

申请号：US09353317

申请日：1999-07-14

申请人： Yoshiyasu Ueno

发明人： Yoshiyasu Ueno

IPC分类号： G02F1365

CPC分类号： G02F1/3517 ,  G02F2/004 ,  G02F2001/212 ,  H01S5/5054

摘要： An all-optical switch for outputting output light by transmitting/interrupting second input light with a second wavelength synchronizing with first input light with a first wavelength. The all-optical switch has: an optical interferometer to which the first and second input lights are input and which is composed of a non-linear semiconductor waveguide; a supervisory laser light source which supplies supervisory light with a third wavelength to the optical interferometer; and a controller to which supervisory light output from the optical interferometer is input as output supervisory light and which controls the phase bias of the interferometer according to the output supervisory light.

摘要翻译： 一种全光开关，用于通过以与第一波长的第一输入光同步的具有第二波长的第二输入光发射/中断来输出输出光。 全光开关具有：输入第一和第二输入光的光干涉仪，由非线性半导体波导构成; 向所述光干涉仪提供具有第三波长的监控光的监控激光光源; 以及从光干涉仪输出的监控光被输入的控制器作为输出监控光，并根据输出监视光控制干涉仪的相位偏置。

公开(公告)号：US06208455B1

公开(公告)日：2001-03-27

申请号：US09082822

申请日：1998-05-21

申请人： Yoshiyasu Ueno ,  Kazuhito Tajima ,  Shigeru Nakamura

发明人： Yoshiyasu Ueno ,  Kazuhito Tajima ,  Shigeru Nakamura

IPC分类号： G02F1365

CPC分类号： G02F2/004 ,  G02F2001/212

摘要： Disclosed is a wavelength converter that is appropriate for long-distance large-capacity optical communication, a wavelength converter according to the present invention includes: waveguides 1 and 2 for producing nonlinear changes in refractive indices; light interaction circuits 3 and 4; and light delay circuits 9 and 10. When an input signal pulse interval is denoted by To and a speed at which signal pulse light proceeds through a delay circuit is denoted by vg, a difference &Dgr;Ld for optical paths in the light delay circuits satisfies a relation &Dgr;Ld=vgTo/2. As a result, when there is an interaction involving two sequential light beams, the phases of which are demodulated by the input signal pulse, the wavelength chirping affecting the light beams is canceled out.

摘要翻译： 公开了适用于长距离大容量光通信的波长转换器，根据本发明的波长转换器包括：用于产生折射率的非线性变化的波导1和2; 光互动电路3和4; 和光延迟电路9和10.当输入信号脉冲间隔由To表示，信号脉冲光通过延迟电路进行的速度由vg表示时，光延迟电路中的光路的差值DELTALd满足关系 DELTALd = vgTo / 2。 结果，当存在涉及两个顺序光束的相互作用时，其相位被输入信号脉冲解调，消除影响光束的波长啁啾。