基于超声光栅的可调谐光学变频器

    公开(公告)号:WO2013075567A1

    公开(公告)日:2013-05-30

    申请号:PCT/CN2012/083446

    申请日:2012-10-24

    Applicant: 深圳大学

    Abstract: 一种基于超声光栅的可调谐光学变频器,包括激光器(1)、第一光隔离器(2)和循环移频模块(3)。循环移频模块(3)由光耦合器(31)、超声光栅(32)、透镜组(33,34)、光放大器(35)、第二光隔离器(36)、第一光环行器(37)、光纤布喇格光栅(38)、第二光环行器(39)、可调谐滤波器(310)以及可调衰减器(311)组成。激光器(1)输出的光经过第一光隔离器(2)后输入到循环移频模块(3)中进行反复移频,然后经过可调谐滤波器(310)滤波和第二光环行器(39)分离,再从循环移频模块(3)的端口(4)输出变频光。该变频器体积紧凑,光学元件少因而易集成,变频范围大,变频效率高,输出功率高。

    PHASE-MATCHED TERAHERTZ EMITTER
    64.
    发明申请
    PHASE-MATCHED TERAHERTZ EMITTER 审中-公开
    相位匹配的TERAHERTZ发射器

    公开(公告)号:WO2007070575A2

    公开(公告)日:2007-06-21

    申请号:PCT/US2006047539

    申请日:2006-12-13

    Abstract: Methods and apparatus are disclosed for directing optical radiation to make multiple passes across an extended region of an electro-optic material, where during each pass the electro-optic material converts a portion of the optical radiation into terahertz radiation, and where the optical radiation is directed into the electro-optic material to cause an amplitude of the terahertz radiation generated from one or more earlier passes of the optical radiation to be constructively enhanced by the terahertz radiation generated from a later pass of the optical radiation.

    Abstract translation: 公开了用于引导光辐射跨越电光材料的延伸区域进行多次通过的方法和装置,其中在每次通过期间,电光材料将光辐射的一部分转换成太赫兹辐射,并且其中光辐射为 引导到电光材料中,以使得由光辐射的一个或多个较早的通过产生的太赫兹辐射的振幅被由光辐射的稍后通过产生的太赫兹辐射构建性地增强。

    AN ELECTRO-OPTICALLY TUNABLE OPTICAL FILTER
    65.
    发明申请
    AN ELECTRO-OPTICALLY TUNABLE OPTICAL FILTER 审中-公开
    一种电光调谐光学滤波器

    公开(公告)号:WO2005011171A8

    公开(公告)日:2005-03-10

    申请号:PCT/GB2004003090

    申请日:2004-07-15

    CPC classification number: H04J14/0221 G02F1/21 G02F2201/17 G02F2203/585

    Abstract: The present invention provides a method and apparatus for filtering an optical signal. The method includes receiving at least one input optical signal, forming first and second optical signals using the at least one input optical signal, and modifying at least one portion of the first optical signal using a plurality of non-waveguiding electro-optic phase adjusters. The method also includes forming an output optical signal by combining the first optical signal, including the at least one modified portion of the first optical signal, with the second optical signal.

    Abstract translation: 本发明提供了一种用于滤波光信号的方法和装置。 该方法包括接收至少一个输入光信号,使用至少一个输入光信号形成第一和第二光信号,以及使用多个非波导电光相位调整器修改第一光信号的至少一部分。 该方法还包括通过将包括第一光信号的至少一个修改部分的第一光信号与第二光信号组合来形成输出光信号。

    FIBER OPTICAL ATTENUATOR
    66.
    发明申请
    FIBER OPTICAL ATTENUATOR 审中-公开
    光纤光衰

    公开(公告)号:WO02071133A8

    公开(公告)日:2004-04-01

    申请号:PCT/IL0200188

    申请日:2002-03-08

    Inventor: COHEN GIL

    Abstract: A fiber optical attenuator utilizing the cut-off phenomenon for single mode propagation of an optical wave down a single mode fiber, comprising an element such as a pixelated liquid crystal element, capable of spatially changing the phase across the cross section of an input optical signal. Such a spatial phase change is equivalent to a change in the mode structure of the propagating wave. The signal propagating in the single mode output fiber is attenuated in accordance with the extent to which higher order modes are mixed into the low order mode originally present. When the mode is completely transformed to higher order modes, the wave is effectively completely blocked from entering the output single-mode fiber, and the attenuation is high. The level of attenuation is determined by the fraction of the wave which is converted to modes other than the lowest order mode, and is thus controllable by the voltage applied to the pixels of the liquid crystal element.

    Abstract translation: 一种光纤衰减器,其利用用于单模光纤单模传播的截止现象的光纤衰减器,其包括诸如像素化液晶元件的元件,其能够在输入光信号的横截面上空间改变相位 。 这样的空间相位变化相当于传播波的模式结构的变化。 在单模输出光纤中传播的信号根据最初存在的低阶模式混合到高阶模式的程度而衰减。 当模式完全转换为高阶模式时,波被有效完全阻止进入输出单模光纤,衰减高。 衰减的水平由转换成除了最低阶模式之外的模式的波的分数确定,并且因此可以通过施加到液晶元件的像素的电压来控制。

    FOUR-WAVE-MIXING BASED OPTICAL WAVELENGTH CONVERTER DEVICE
    67.
    发明申请
    FOUR-WAVE-MIXING BASED OPTICAL WAVELENGTH CONVERTER DEVICE 审中-公开
    基于四波混频的光波导转换器

    公开(公告)号:WO2004003653A1

    公开(公告)日:2004-01-08

    申请号:PCT/EP2002/007207

    申请日:2002-06-28

    Abstract: Wavelength converter device (100), for generating a converted radiation at frequency Ω g through interaction between at least one signal radiation at frequency Ω g and at least one pump radiation at frequency Ω g, comprising * an input (1) for said at least one signal radiation at frequency Ω g; * a pump light source (3) for generating said at least one pump radiation at frequency Ω g; * an output (2) for taking out said converted radiation at frequency Ω g; * a structure (4) for transmitting said signal radiation, said structure (4) including one optical resonator (10) comprising a non-linear material, having an optical length of at least 40*η/2, wavelength η is the wavelength of the pump radiation, and resonating at the pump, signal and converted frequencies Ω p, Ω s and Ω¿g, ? characterized in that said structure (4) comprises a further optical resonator (20) coupled in series to said optical resonator (10), said further optical resonator (20) comprising a non-linear material, having an optical length of at least 40*η/2, wherein η is the wavelength of the pump radiation, and resonating at the pump, signal and converted Ω p, Ω s and Ω g; wherein by propagating through said structure (4) the pump and signal radiation generate said converted radiation by non-linear interaction within said optical resonators (10, 20).

    Abstract translation: 波长转换器装置(100),用于通过频率ωg至少一个信号辐射与频率ωg的至少一个泵浦辐射之间的相互作用产生频率ωg的转换辐射,包括*输入( 1)用于所述至少一个频率ωg的信号辐射; * *泵浦光源(3),用于以ω= g产生所述至少一个泵浦辐射; *输出(2),用于取出所述转换的 频率ωg的辐射;用于传输所述信号辐射的结构(4),所述结构(4)包括包括非线性材料的一个光学谐振器(10),其具有至少40 * eta / 如图2所示,波长eta是泵浦辐射的波长,并且在泵,信号和转换频率ωω,ω,ω和ω下共振,其特征在于所述结构(4)包括另外的光谐振器 (20),其与所述光学谐振器(10)串联耦合,所述另外的光学装置 (20)包括具有至少40 * eta / 2的光学长度的非线性材料,其中eta是泵浦辐射的波长,并且在泵谐振,信号和转换Omega> p, 其中通过传播所述结构(4),所述泵和信号辐射在所述光学谐振器(10,20)内通过非线性相互作用产生所述转换的辐射。

    STRUCTURE WITH VARIABLE EMITTANCE
    68.
    发明申请
    STRUCTURE WITH VARIABLE EMITTANCE 审中-公开
    具有可变发射的结构

    公开(公告)号:WO2002082172A1

    公开(公告)日:2002-10-17

    申请号:PCT/GB2002/001396

    申请日:2002-03-22

    Abstract: A structure is disclosed which comprises a thermochromic layer located between a front layer and a back layer, wherein the front layer is a dielectric and is in contact with the thermochromic layer, and wherein the back layer is reflective to infrared (IR) radiation. Below the thermochromic transition temperature of the thermochromic layer, the front layer and thermochromic layer are IR-transparent, so the structure is highly reflective to IR radiation because of the presence of the reflective back layer. Consequently, the structure has a low emittance in this state. Above the thermochromic transition temperature of the thermochromic layer, the device structure becomes IR-absorbent, so the reflectance of the structure is reduced and hence its emittance is increased. The front layer index-matches with the thermochromic layer above the transition temperature of the thermochromic layer to enable radiation to enter the thermochromic layer.

    Abstract translation: 公开了一种结构,其包括位于前层和背层之间的热致变色层,其中前层是电介质并与热致变色层接触,并且其中背层为红外(IR)辐射。 在热致变色层的热变色温度以下,前层和热变色层是IR透明的,因此由于反射背层的存在,结构对IR辐射具有高反射性。 因此,该结构在该状态下具有低发射度。 在热致变色层的热变色温度以上时,器件结构变为IR吸收剂,因此结构的反射率降低,因此其发射率增加。 前层折射率与热变色层​​的热变色层的转变温度之上匹配,以使辐射进入热致变色层。

    FOLDED LIQUID-CRYSTAL VARIABLE OPTICAL ATTENUATOR
    69.
    发明申请
    FOLDED LIQUID-CRYSTAL VARIABLE OPTICAL ATTENUATOR 审中-公开
    折叠液晶可变光学衰减器

    公开(公告)号:WO02044800A2

    公开(公告)日:2002-06-06

    申请号:PCT/US2001/051142

    申请日:2001-11-02

    Abstract: A variable optical attenuator including: a birefringent element positioned to separate an input optical signal into two spatially separated, orthogonally polarized beams; a LC modulator positioned to receive the orthogonally polarized beams and selectively alter their polarizations; a reflective element positioned to reflect the beams back through the LC modulator and the birefringent element, wherein the birefringent element recombines orthogonally polarized components of the reflected beams to produce an output optical signal; and a controller coupled to the LC modulator to selectively cause the LC modulator to alter the polarizations of the orthogonally polarized beams, wherein during operation the controller is responsive to a request to variably attenuate the intensity of the output optical signal relative to the intensity of the input optical signal to one of multiple non-zero attenuation settings.

    Abstract translation: 一种可变光衰减器,包括:双折射元件,定位成将输入光信号分离成两个空间分离的正交偏振光束; 定位成接收正交偏振光束并选择性地改变其极化的LC调制器; 反射元件,定位成将光束反射通过LC调制器和双折射元件,其中双折射元件将反射光束的正交极化分量重新组合以产生输出光信号; 以及控制器,其耦合到所述LC调制器以选择性地使所述LC调制器改变所述正交偏振光束的极化,其中在操作期间,所述控制器响应于相对于所述LC调制器的强度可变地衰减所述输出光信号的强度的请求 输入光信号到多个非零衰减设置之一。

    VERFAHREN UND ANORDNUNG ZUR SPEKTRALEN VERBREITERUNG VON LASERPULSEN FÜR DIE NICHTLINEARE PULSKOMPRESSION
    70.
    发明申请
    VERFAHREN UND ANORDNUNG ZUR SPEKTRALEN VERBREITERUNG VON LASERPULSEN FÜR DIE NICHTLINEARE PULSKOMPRESSION 审中-公开
    方法和系统非线性脉冲压缩激光脉冲的谱延拓

    公开(公告)号:WO2015173245A1

    公开(公告)日:2015-11-19

    申请号:PCT/EP2015/060484

    申请日:2015-05-12

    Abstract: Die vorliegende Erfindung betrifft ein Verfahren und eine Anordnung zur spektralen Verbreiterung von Laserpulsen für die nichtlineare Pulskompression. Das Verfahren und die Anordnung basieren auf dem Übergang von der spektralen Verbreiterung in einem Wellenleiter zur spektralen Verbreiterung in einem geeignet gestalteten Linsenleiter. Die Anordnung ist unempfindlich gegenüber Schwankungen der Pulsleistung, der Strahllage und der Strahlparameter. Die spektral verbreiterten Pulse sind gut komprimierbar und die Strahlqualität bleibt erhalten. Um das zu erreichen, wird die zur spektralen Verbreiterung erforderliche nichtlineare Phase auf hinreichend kleine Schritte aufgeteilt, die durch eine geeignete Propagation ohne Nichtlinearität getrennt werden. Dadurch wird die Limitierung auf Pulsleistungen kleiner als die kritische Leistung von Dielektrika überwunden und somit ein Pulsenergiebereich erschlossen, für den diespektrale Verbreiterung in Glasfasern nicht anwendbar ist. Da die Anordnung keine begrenzende Apertur besitzt und daher keine Leistung absorbiert oder abschneidet, ist sie in besonderer Weise geeignet, Pulse mit großer mittlerer Leistung zu komprimieren.

    Abstract translation: 本发明涉及一种方法和用于非线性脉冲压缩的激光脉冲的频谱展宽的结构。 方法和装置是基于从所述谱展宽在用于在适当形状的透镜导体光谱加宽波导的过渡。 该装置是不敏感的脉冲功率,光束位置和光束参数的变化。 的谱展宽脉冲是可压缩的,光束质量得以保持。 为了实现这一点,所需要的频谱展宽非线性相位分为足够小的步骤,其通过合适的传播没有非线性分离。 由此,在脉冲功率的限制是小于克服电介质的临界功率,从而开发了用于这在玻璃纤维diespektrale加宽的脉冲能量范围是不适用的。 由于该装置具有没有孔径限制,并且因此不吸收功率或切断,这是特别适合的具有大平均功率来压缩脉冲。

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