公开(公告)号：US4058739A

公开(公告)日：1977-11-15

申请号：US746161

申请日：1976-11-30

申请人： John Ernst Bjorkholm ,  Gary Carl Bjorklund ,  Paul Foo-Hung Liao

发明人： John Ernst Bjorkholm ,  Gary Carl Bjorklund ,  Paul Foo-Hung Liao

IPC分类号： G02F1/35 ,  H03F7/00

CPC分类号： G02F1/3534

摘要： A method and apparatus for phase-matching the output of a four-wave nonlinear optical mixing process is disclosed. The method produces phase-matching that is independent of variations in density of the conversion medium and extends over the entire frequency spectrum from the far infrared to the vacuum ultraviolet. The phase-matching is accomplished by adjustment of the frequencies of three input lasers so that the desired frequency is produced, the condition for two-photon resonance enhancement is met, and the phase-matching condition is satisfied.

摘要翻译： 公开了一种用于对四波非线性光学混合过程的输出进行相位匹配的方法和装置。 该方法产生与转换介质的密度变化无关的相位匹配，并且在从远红外线到真空紫外线的整个频谱上延伸。 通过调整三个输入激光器的频率来实现相位匹配，从而产生期望的频率，满足双光子谐振增强的条件，并且满足相位匹配条件。

公开(公告)号：US4040718A

公开(公告)日：1977-08-09

申请号：US646425

申请日：1976-01-05

申请人： Gary Carl Bjorklund ,  Paul Foo-Hung Liao

发明人： Gary Carl Bjorklund ,  Paul Foo-Hung Liao

IPC分类号： G02F1/35

CPC分类号： G02F1/3526

摘要： An optical polarization rotator is implemented without any magnetic field by using dispersion due to two-photon transitions. The polarization rotator is useful for powerful coherent linearly-polarized optical beams. A second powerful circularly-polarized coherent optical beam provides control for the polarization rotation of the linearly-polarized beam which interacts more strongly with the oppositely circularly-polarized component of the first beam than with the other component of the first beam. The difference in interaction occurs because the gaseous medium atoms in the cell in which the interaction occurs begin and end a nearby resonance transition that determines the two-photon dispersion in the same angular momentum state; and, because of this quantum state selection rule, the result is a relative delay between the two circularly-polarized components of the linearly-polarized beam and a consequent rotation of the orientation of linear polarization.

摘要翻译： 通过使用由于双光子跃迁引起的色散，实现了没有任何磁场的光学偏振旋转器。 偏振旋转器对于强相干线性偏振光束是有用的。 第二个强大的圆偏振相干光束提供对线性偏振光束的偏振旋转的控制，其与第一光束的另一个分量相比更强烈地与第一光束的相反圆偏振分量相互作用。 相互作用的差异发生是因为相互作用发生的细胞中的气体介质原子开始并结束了在相同角动量状态下确定双光子色散的附近共振转变; 并且由于该量子态选择规则，结果是线性偏振光束的两个圆极化分量之间的相对延迟以及由此引起的线性偏振取向的旋转。

公开(公告)号：US3999839A

公开(公告)日：1976-12-28

申请号：US647435

申请日：1976-01-08

申请人： Gary Carl Bjorklund ,  Paul Foo-Hung Liao

发明人： Gary Carl Bjorklund ,  Paul Foo-Hung Liao

IPC分类号： G02F1/35 ,  G02F1/16

CPC分类号： G02F1/3526

摘要： Two different pulse compressors for relatively intense optical beams differ from the prior art both in employing a two-photon dispersion effect and in employing a different set of modulations than is conventional for "chirped" pulse compressors. The first one depends upon turning on and then turning off a two-photon dispersion effect of an atomic gaseous medium upon a first coherent beam from which the pulse is to be formed. The effect is turned on and off by the second beam within a time period not substantially more than the length of the medium divided by the dispersive group velocity of the first beam in the medium. The dispersion in effect allows energy to be concentrated in the medium by means of a temporary delay. The second device is analogous to that of U.S. Pat. No. 3,679,313 to R. L. Rosenberg, issued July 25, 1972, in employing overlapping "comb" patterns of modulation products but differs therefrom in that it replaces the dispersive interferometer with the two-photon dispersive gas medium and employs much wider frequency modulations. The first beam is chirped, or frequency-modulated, at a first rate; but the second beam is frequency-modulated at a rate sufficiently different from that of the first beam that the modulation product combs intermesh to provide two-photon interaction over the broadest possible frequency band.

摘要翻译： 对于相对较强的光束，两种不同的脉冲压缩机与现有技术不同之处在于采用双光子色散效应和采用与传统的“啁啾”脉冲压缩器不同的一组调制。 第一个取决于打开，然后关闭原子气体介质的双光子色散效应在其上将形成脉冲的第一相干光束上。 该效果在不超过介质长度的时间段内被第二光束打开和关闭除以介质中第一光束的色散组速度。 实际上的色散使得能量通过暂时的延迟集中在介质中。 第二装置类似于美国专利No. 1972年7月25日授权的R.L.Rosenberg的第3,679,313号中，采用了重叠的“梳状”调制产物图案，但与之不同之处在于它用双光子色散气体介质代替了色散干涉仪，并采用了更广泛的频率调制。 第一波束以第一速率被啁啾或频率调制; 但是第二波束以与调制产物相互啮合的第一波束的速率充分不同的速率进行频率调制，以在最广的可能频带上提供双光子相互作用。

公开(公告)号：US4093338A

公开(公告)日：1978-06-06

申请号：US648326

申请日：1976-01-12

申请人： Gary Carl Bjorklund ,  Linn Frederick Mollenauer ,  Walter John Tomlinson, III

发明人： Gary Carl Bjorklund ,  Linn Frederick Mollenauer ,  Walter John Tomlinson, III

IPC分类号： G02B5/32 ,  G01B9/02 ,  G03H1/04

CPC分类号： G02B5/32 ,  Y10S359/90

摘要： Apparatus for piecewise generation of grating-like patterns in photoresponsive material with a coherent the class which splits the coherent beam into two component beams. The two component beams intersect forming a parallel plane interference pattern on a section of the photoresponsive material. An arrangement which translates the beam parallel to itself forms the interference pattern in registration with the previously generated pattern on a different section of the photoresponsive material.

摘要翻译： 用于在光响应材料中分段生成光栅样图案的装置，具有将相干光束分成两个分量光束的相干类。 两个分量光束在光响应材料的一部分上相交形成平行平面干涉图案。 将光束平行于其自身转换的布置形成与光响应材料的不同部分上的先前生成的图案对准的干涉图案。

公开(公告)号：US3991386A

公开(公告)日：1976-11-09

申请号：US616572

申请日：1975-09-25

申请人： Gary Carl Bjorklund ,  Linn Frederick Mollenauer

发明人： Gary Carl Bjorklund ,  Linn Frederick Mollenauer

IPC分类号： H01S3/063 ,  H01S3/083 ,  H01S3/16

CPC分类号： H01S3/0635 ,  H01S3/083 ,  H01S3/1681

摘要： The disclosed distributed feedback laser employs an alkali halide crystal having a spatially modulated pattern of a stable color center and a complementary spatially modulated pattern of U-centers. The stability of the color centers is provided by initial additive coloration, conversion to U-centers, and subsequent reconversion; and the spatial modulation is provided by patterning the reconversion by exposing a portion of the crystal to an interference pattern of coherent light. Conversion occurs by two-photon absorption. The very large penetration depth and the use of ultraviolet frequencies that are only about one-half of the magnitude of the frequencies that would otherwise be required make this device and process attractive for thick holograms and for distributed feedback devices such as lasers.

摘要翻译： 所公开的分布式反馈激光器采用具有稳定色心的空间调制图案和U-中心的互补空间调制图案的碱金属卤化物晶体。 颜色中心的稳定性通过初始添加剂着色，转换为U-中心和随后的再转化来提供; 并且通过将晶体的一部分暴露于相干光的干涉图案来图案化再转换来提供空间调制。 转换通过双光子吸收发生。 非常大的穿透深度和紫外线频率的使用仅为否则将要求的频率幅度的大约一半，使该器件和工艺对于厚全息图以及诸如激光器的分布式反馈装置而言是有吸引力的。

公开(公告)号：US06280884B1

公开(公告)日：2001-08-28

申请号：US08230659

申请日：1994-04-21

申请人： Gary Carl Bjorklund ,  William Esco Moerner ,  Scott Meixner Silence

发明人： Gary Carl Bjorklund ,  William Esco Moerner ,  Scott Meixner Silence

IPC分类号： G03H102

CPC分类号： G03H1/02 ,  G02F1/3615 ,  G03H2001/026 ,  G03H2001/0264 ,  G03H2260/54 ,  G11B7/245 ,  G11B7/25

摘要： The present invention relates to an improved process for photorefractive index grating formation utilizing polymeric photorefractive materials. The process involves the steps of: (i) exposing a polymeric optical article to electromagnetic radiation having an intensity of at least 0.05 W/cm2 for a short period of time to achieve an absorbed energy/unit volume of at least 1×103 J/cm3 to activate the article, and (ii) exposing the polymeric optical article to an electric field and electromagnetic radiation to form an index grating.

摘要翻译： 本发明涉及利用聚合光折射材料的光折射光栅形成的改进方法。 该方法包括以下步骤：（i）将聚合物光学制品暴露于具有至少0.05W / cm 2的强度的电磁辐射短时间以达到吸收的能量/单位体积至少为1×103J / cm3至 激活物品，和（ii）将聚合物光学物品暴露于电场和电磁辐射以形成折射光栅。

公开(公告)号：US4091290A

公开(公告)日：1978-05-23

申请号：US831529

申请日：1977-09-08

申请人： Gary Carl Bjorklund ,  Richard Reiling Freeman

发明人： Gary Carl Bjorklund ,  Richard Reiling Freeman

IPC分类号： G02F1/35 ,  H03F7/00

CPC分类号： G02F1/3534

摘要： A source of tunable vacuum ionizing radiation is disclosed in which the range of resonance enhancement is extended by Stark-shifting the frequencies of autoionizing states in the continuum of the conversion medium.

摘要翻译： 公开了一种可调谐真空电离辐射源，其中通过在转换介质的连续体中通过Stark移位自动电离状态的频率来扩展谐振增强的范围。