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1. 发明授权

US06268956B1 End pumped zig-zag slab laser gain medium 有权
标题翻译：末端抽取锯齿状平板激光增益介质
公开(公告)号：US06268956B1
公开(公告)日：2001-07-31
申请号：US09580726
申请日：2000-05-30
申请人： Hagop Injeyan , Carolyn S. Hoefer , Stephen P. Palese
发明人： Hagop Injeyan , Carolyn S. Hoefer , Stephen P. Palese
IPC分类号： H01S300
CPC分类号： H01S3/0602 , H01S3/042 , H01S3/0606 , H01S3/0612 , H01S3/0615 , H01S3/0623 , H01S3/0625 , H01S3/063 , H01S3/08095 , H01S3/094053 , H01S3/094057 , H01S3/09408 , H01S3/0941 , H01S3/09415 , H01S3/11 , H01S3/1603 , H01S3/1643 , H01S3/2308 , H01S3/2383
摘要： An optical amplifier (20, 100) includes an elongated slab (22, 102) of solid state lapsing material, such as a rare earth doped yttrium-aluminum-garnet (YAG) slab. In order to provide a relatively increased absorption length and thus a higher overall efficiency, the optical amplifier (20, 100) in accordance with the present invention incorporates end pumping in which the pumped light is coaligned with the amplified light resulting in relatively longer absorption lengths and higher overall efficiencies. The coaligned pumped sources are directed to lateral faces of the slab (22, 102) which include footprints (41, 43, 108) or windows. In order to cause internal reflection of the pump beam along the lapsing axis, the end faces (28, 30, 110) are formed at about a 45° angle relative to the longitudinal axis which causes the pumped light to be reflected within the slab co-axially with amplified light. In order to confine the absorption of the pumped light to the center portion of the slab (22, 102), the slab (22, 102) may be formed from a composite material with the opposing end portions of the slab formed from an undoped host material while the center portion of the slab along the longitudinal axis is formed from a doped host material. Such a configuration provides relatively low residual thermal lensing with virtually no birefringence. In one embodiment, the pumping light from the diode arrays is coupled to the slab (22, 102) by way of lenses (54) or lens ducts (FIG. 1). In an alternate embodiment, the pumping light is coupled to the slab (22, 102) by way of optical fibers (104, 106). In yet another embodiment (FIG. 8), the pumping light and laser beams are interchanged forming a low-loss straight through slab with end pumped architecture.
摘要翻译：光学放大器（20,100）包括固态收缩材料的细长板（22,102），例如稀土掺杂的钇 - 铝 - 石榴石（YAG）板。为了提供相对增加的吸收长度并因此提供更高的总体效率，根据本发明的光放大器（20,100）包括端泵浦，其中泵浦的光与放大的光轴相结合，导致相对更长的吸收长度并提高整体效率。联合泵送源被引导到板坯（22,102）的侧面，其包括脚印（41,43,108）或窗口。为了引起泵浦光束沿着折叠轴的内部反射，端面（28,30,110）相对于纵向轴线以大约45°的角度形成，这导致泵送的光在板坯co 用放大的光轴。为了将抽吸光的吸收限制在板坯（22,102）的中心部分，板坯（22,102）可以由复合材料形成，其中板坯的相对端部由未掺杂的主体而沿着纵向轴线的板坯的中心部分由掺杂的主体材料形成。这种构造提供了相对较低的剩余热透镜，实际上没有双折射。在一个实施例中，来自二极管阵列的泵浦光通过透镜（54）或透镜导管（图1）耦合到板坯（22,102）。在替代实施例中，泵浦光通过光纤（104,106）耦合到板坯（22,102）。在另一个实施例（图8）中，泵浦光和激光束互换形成具有末端泵浦结构的低损耗直通板。

2. 发明授权

US5555254A High brightness solid-state laser with zig-zag amplifier 失效
标题翻译：具有锯齿形放大器的高亮度固态激光器
公开(公告)号：US5555254A
公开(公告)日：1996-09-10
申请号：US148758
申请日：1993-11-05
申请人： Hagop Injeyan , Randall J. St. Pierre , Rodger C. Hilyard , George M. Harpole , Carolyn S. Hoefer
发明人： Hagop Injeyan , Randall J. St. Pierre , Rodger C. Hilyard , George M. Harpole , Carolyn S. Hoefer
IPC分类号： G02F1/35 , H01S3/04 , H01S3/042 , H01S3/06 , H01S3/08 , H01S3/0941 , H01S3/10 , H01S3/109 , H01S3/23
CPC分类号： H01S3/2316 , H01S3/042 , H01S3/0606 , H01S3/0941 , H01S3/0407 , H01S3/0621 , H01S3/0625 , H01S3/08072 , H01S3/08095 , H01S3/10076 , H01S3/109
摘要： A solid-state laser architecture producing a beam of extremely high quality and brightness, including a master oscillator operating in conjunction with a zig-zag amplifier, an image relaying telescope and a phase conjugation cell. One embodiment of the laser architecture compensates for birefringence that is thermally induced in the amplifier, but injects linearly polarized light into the phase conjugation cell. Another embodiment injects circularly polarized light into the phase conjugation cell and includes optical components that eliminate birefringence effects arising in a first pass through the amplifier. Optional features permit the use of a frequency doubler assembly to provide output at twice optical frequencies, and an electro-optical switch or Faraday rotator to effect polarization angle rotation if the amplifier material can only be operated at one polarization. The zig-zag amplifier is cooled by flow of cooling liquid, preferably using longitudinal flow to minimize temperature gradients in a vertical direction, and has cooling channel seals disposed in dead zones that receive no light, to minimize optical damage to the seals. Light is input to the amplifier at a near normal angle of incidence, to minimize polarization by reflection and to permit a polarizer to be used to extract an output beam from the amplifier. Antireflective coatings on edges and on sides of the amplifier eliminate parasitic oscillations, and wedge-shaped windows provide uniform pumping by eliminating gaps between diode arrays.
摘要翻译：一种固态激光器架构，产生了极高质量和亮度的光束，包括与之前的Zig放大器，图像中继望远镜和相位共轭单元结合操作的主振荡器。激光器结构的一个实施例补偿了在放大器中热感应的双折射，但是将线偏振光注入到相位共轭单元中。另一实施例将圆偏振光注入到相位共轭单元中，并且包括消除在第一次通过放大器中产生的双折射效应的光学部件。可选功能允许使用倍频器组件提供两倍光频率的输出，以及如果放大器材料只能在一个极化下操作，则电光开关或法拉第旋转器可实现偏振角旋转。锯齿形放大器通过冷却液体的流动来冷却，优选地使用纵向流动以使垂直方向上的温度梯度最小化，并且具有设置在不受光的死区中的冷却通道密封件，以最小化对密封件的光学损伤。光以接近的正常入射角输入到放大器，以通过反射使偏振最小化，并允许使用偏振器从放大器提取输出光束。在放大器的边缘和侧面上的抗反射涂层消除了寄生振荡，楔形窗口通过消除二极管阵列之间的间隙来提供均匀的泵浦。

3. 发明授权

US06256142B1 End pumped zig-zag slab laser gain medium 有权
标题翻译：末端抽取锯齿状平板激光增益介质
公开(公告)号：US06256142B1
公开(公告)日：2001-07-03
申请号：US09584011
申请日：2000-05-30
申请人： Hagop Injeyan , Carolyn S. Hoefer
发明人： Hagop Injeyan , Carolyn S. Hoefer
IPC分类号： H01S300
CPC分类号： H01S3/09415 , H01S3/0606 , H01S3/0625 , H01S3/08095 , H01S3/09408 , H01S3/11 , H01S3/1603 , H01S3/1643 , H01S3/2308
摘要： An optical amplifier which includes an elongated slab of solid state lasing material, such as a rare earth doped yttrium-aluminum-garnet (YAG). In order to provide a relatively increased absorption length and thus a higher overall efficiency, the optical amplifier in accordance with the present invention incorporates end pumping in which the pumped light is coaligned with the amplified light resulting in relatively longer absorption lengths and higher overall efficiencies. The coaligned pumped sources are directed to lateral faces of the slab which include windows, formed from an insulating coating such as an anti-reflection coating, at the pump wavelength. In order to cause internal reflection of the pump beam along the lasing axis, the end faces are formed at about a 45° angle relative to the longitudinal axis which causes the pumped light to be reflected within the slab co-axially a with a amplified light. In order to confine the absorption of the pumped light to the center portion of the slab, the opposing end portions of the slab may be undoped while the center portion of the slab along the longitudinal axis is doped. Such a configuration provides relatively low residual thermal lensing with virtually no birefringence.
摘要翻译：一种光放大器，其包括细长的固态激光材料板，例如稀土掺杂的钇 - 铝 - 石榴石（YAG）。为了提供相对增加的吸收长度并因此提供更高的总体效率，根据本发明的光放大器结合了端泵浦，其中泵浦光与放大的光轴相结合，导致相对更长的吸收长度和更高的总体效率。联合的泵浦源被引导到板的横向面，其包括由诸如防反射涂层的绝缘涂层形成的窗口，在泵浦波长处。为了引起泵浦光束沿着激光轴的内部反射，端面相对于纵向轴线以大约45度的角度形成，这使得泵浦的光在板内与放大的光同轴地反射。为了将抽吸光的吸收限制在板坯的中心部分，板坯的相对的端部可以是未掺杂的，而沿着纵向轴线的板坯的中心部分被掺杂。这种构造提供了相对较低的剩余热透镜，实际上没有双折射。

4. 发明授权

US6094297A End pumped zig-zag slab laser gain medium 失效
标题翻译：末端抽取锯齿状平板激光增益介质
公开(公告)号：US6094297A
公开(公告)日：2000-07-25
申请号：US111080
申请日：1998-07-07
申请人： Hagop Injeyan , Carolyn S. Hoefer
发明人： Hagop Injeyan , Carolyn S. Hoefer
IPC分类号： H01S3/094 , H01S3/06 , H01S3/063 , H01S3/093 , H01S3/0941 , H01S3/16 , H01S3/23 , H01S3/00 , H01S3/091
CPC分类号： H01S3/09415 , H01S3/0606 , H01S3/0625 , H01S3/08095 , H01S3/09408 , H01S3/11 , H01S3/1603 , H01S3/1643 , H01S3/2308
摘要： An optical amplifier which includes an elongated slab of solid state lasing material, such as a rare earth doped yttrium-aluminum-garnet (YAG). In order to provide a relatively increased absorption length and thus a higher overall efficiency, the optical amplifier in accordance with the present invention incorporates end pumping in which the pumped light is coaligned with the amplified light resulting in relatively longer absorption lengths and higher overall efficiencies. The coaligned pumped sources are directed to lateral faces of the slab which include windows, formed from an insulating coating such as an anti-reflection coating, at the pump wavelength. In order to cause internal reflection of the pump beam along the lasing axis, the end faces are formed at about a 45.degree. angle relative to the longitudinal axis which causes the pumped light to be reflected within the slab co-axially with a amplified light. In order to confine the absorption of the pumped light to the center portion of the slab, the opposing end portions of the slab may be undoped while the center portion of the slab along the longitudinal axis is doped. Such a configuration provides relatively low residual thermal lensing with virtually no birefringence.
摘要翻译：一种光放大器，其包括细长的固态激光材料板，例如稀土掺杂的钇 - 铝 - 石榴石（YAG）。为了提供相对增加的吸收长度并因此提供更高的总体效率，根据本发明的光放大器结合了端泵浦，其中泵浦光与放大的光轴相结合，导致相对更长的吸收长度和更高的总体效率。联合的泵浦源被引导到板的横向面，其包括由诸如防反射涂层的绝缘涂层形成的窗口，在泵浦波长处。为了引起泵浦光束沿着激光轴线的内部反射，端面相对于纵向轴线以大约45度的角度形成，这导致泵浦光在板内与放大的光线同轴地反射。为了将抽吸光的吸收限制在板坯的中心部分，板坯的相对的端部可以是未掺杂的，而沿着纵向轴线的板坯的中心部分被掺杂。这种构造提供了相对较低的剩余热透镜，实际上没有双折射。

5. 发明授权

US5646773A Solid-state zig-zag slab optical amplifier 失效
标题翻译：固态曲折平板光学放大器
公开(公告)号：US5646773A
公开(公告)日：1997-07-08
申请号：US541540
申请日：1995-10-10
申请人： Hagop Injeyan , Randall J. St. Pierre , Rodger C. Hilyard , George M. Harpole , Carolyn S. Hoefer
发明人： Hagop Injeyan , Randall J. St. Pierre , Rodger C. Hilyard , George M. Harpole , Carolyn S. Hoefer
IPC分类号： G02F1/35 , H01S3/04 , H01S3/042 , H01S3/06 , H01S3/08 , H01S3/0941 , H01S3/10 , H01S3/109 , H01S3/23 , H01S3/09
CPC分类号： H01S3/2316 , H01S3/042 , H01S3/0606 , H01S3/0941 , H01S3/0407 , H01S3/0621 , H01S3/0625 , H01S3/08072 , H01S3/08095 , H01S3/10076 , H01S3/109
摘要： A solid-state laser architecture producing a beam of extremely high quality and brightness, including a master oscillator operating in conjunction with a zig-zag amplifier, an image relaying telescope and a phase conjugation cell. One embodiment of the laser architecture compensates for birefringence that is thermally induced in the amplifier, but injects linearly polarized light into the phase conjugation cell. Another embodiment injects circularly polarized light into the phase conjugation cell and includes optical components that eliminate birefringence effects arising in a first pass through the amplifier. Optional features permit the use of a frequency doubler assembly to provide output at twice optical frequencies, and an electro-optical switch or Faraday rotator to effect polarization angle rotation if the amplifier material can only be operated at one polarization. The zig-zag amplifier is cooled by flow of cooling liquid, preferably using longitudinal flow to minimize temperature gradients in a vertical direction, and has cooling channel seals disposed in dead zones that receive no light, to minimize optical damage to the seals. Light is input to the amplifier at a near normal angle of incidence, to minimize polarization by reflection and to permit a polarizer to be used to extract an output beam from the amplifier. Antireflective coatings on edges and on sides of the amplifier eliminate parasitic oscillations, and wedge-shaped windows provide uniform pumping by eliminating gaps between diode arrays.
摘要翻译：一种固态激光器架构，产生了极高质量和亮度的光束，包括与之前的Zig放大器，图像中继望远镜和相位共轭单元结合操作的主振荡器。激光器结构的一个实施例补偿了在放大器中热感应的双折射，但是将线偏振光注入到相位共轭单元中。另一实施例将圆偏振光注入到相位共轭单元中，并且包括消除在第一次通过放大器中产生的双折射效应的光学部件。可选功能允许使用倍频器组件提供两倍光频率的输出，以及如果放大器材料只能在一个极化下操作，则电光开关或法拉第旋转器可实现偏振角旋转。锯齿形放大器通过冷却液体的流动来冷却，优选地使用纵向流动以使垂直方向上的温度梯度最小化，并且具有设置在不受光照射的死区中的冷却通道密封件，以最小化对密封件的光学损伤。光以接近的正常入射角输入到放大器，以通过反射使偏振最小化，并允许使用偏振器从放大器提取输出光束。在放大器的边缘和侧面上的抗反射涂层消除了寄生振荡，楔形窗口通过消除二极管阵列之间的间隙来提供均匀的泵浦。

6. 发明授权

US06178040B1 Laser with two orthogonal zig-zag slab gain media for optical phase distortion compensation 失效
标题翻译：激光器具有两个正交的Z形板式增益介质，用于光学相位失真补偿
公开(公告)号：US06178040B1
公开(公告)日：2001-01-23
申请号：US09104477
申请日：1998-06-25
申请人： Hagop Injeyan , Randall J. St. Pierre , Stephen P. Palese
发明人： Hagop Injeyan , Randall J. St. Pierre , Stephen P. Palese
IPC分类号： H01S300
CPC分类号： H01S3/08095 , H01S3/0606 , H01S3/07 , H01S3/08072 , H01S3/2316
摘要： An optical amplifier for use with a solid state laser which includes a pair of elongated slabs of a solid state lasing material, such as a rare earth doped yttrium-aluminum-garnet (YAG) crystal. Two embodiments of the invention are disclosed. In both embodiments of the invention, each of the elongated slabs is formed with a square or generally rectangular cross-section. The slabs are configured such that the longitudinal axes of the slabs are generally co-axial aligned and the slabs are orientated such that the major axis of the slabs are generally orthogonal. By configuring the two slabs to be orthogonal with respect to one another, the integrated thermal lens becomes azimuthally symmetric and can be compensated by a simple external lens. In addition, the negative lensing affect along the major axis of one slab is used to compensate for the positive lensing affect along the minor axis of the other slab and vice versa, thus minimizing the affects of the astigmatism. In an alternate embodiment of the invention, a dove prism is used to rotate the beam instead of rotation of the slabs.
摘要翻译：一种用于固态激光器的光放大器，其包括一对固体激光材料的细长板，例如稀土掺杂的钇铝石榴石（YAG）晶体。公开了本发明的两个实施例。在本发明的两个实施例中，每个细长板形成有方形或大致矩形的横截面。板坯构造成使得板坯的纵向轴线大体上同轴对齐，并且板坯被定向成使得板坯的长轴线大致正交。通过将这两个平板相互配合，集成的热透镜变为方位角对称的，并且可以通过简单的外部透镜进行补偿。此外，沿着一个板坯的长轴的负透镜影响用于补偿沿着另一个板坯的短轴的正透镜影响，反之亦然，从而最小化散光的影响。在本发明的替代实施例中，使用鸽子棱镜来旋转梁而不是板的旋转。

7. 发明授权

US5991315A Optically controllable cooled saturable absorber Q-switch slab 有权
标题翻译：光控冷却饱和吸收器Q开关板
公开(公告)号：US5991315A
公开(公告)日：1999-11-23
申请号：US146892
申请日：1998-09-03
申请人： Hagop Injeyan , Stephen P. Palese
发明人： Hagop Injeyan , Stephen P. Palese
IPC分类号： H01S3/113
CPC分类号： H01S3/113
摘要： A solid state saturable absorber (SSSA) is formed from a slab of solid state material, such as Cr.sup.4+ : YAG. Optical distortion caused by the absorption process can be minimized by confining absorption to portions of the solid state slab which can be cooled efficiently. In accordance with an important aspect of the invention, the use of the SSSA in accordance with the present invention allows the repetition rate, pulse width, and energy level of the laser output pulses to be controlled by way of optical pump sources, such as a diode array. The solid state slab material allows for zig-zag propagation and thus, averaging of the thermal gradients caused by absorption, optical pumping and cooling which results in relatively low thermal lensing with virtually no birefringence and therefore allows for passive Q-switching applications in relatively high brightness laser systems. In an alternate embodiment of the invention, a plurality of thin cells are stacked and immersed in an indexed matched cooling fluid in order to increase the absorption length while minimizing optical distortion.
摘要翻译：固态饱和吸收体（SSSA）由诸如Cr4 +：YAG的固态材料板形成。通过将吸收限制在可以有效冷却的固态板坯的部分上，可以最小化吸收过程引起的光学变形。根据本发明的一个重要方面，根据本发明的SSSA的使用允许激光输出脉冲的重复频率，脉冲宽度和能量水平通过光泵来控制，诸如二极管阵列。固态板材允许锯齿形传播，从而平均由吸收，光泵浦和冷却引起的热梯度，这导致相当低的热透镜，实际上没有双折射，因此允许在相对较高的无源Q开关应用亮度激光系统。在本发明的替代实施例中，多个薄电池被堆叠并浸入索引的匹配冷却流体中，以便增加吸收长度同时最小化光学失真。

8. 发明申请

US20070189351A1 Liquid laser with colloidal suspension of lasant nanoparticles 审中-公开
标题翻译：液体激光与惰性纳米粒子的胶体悬浮液
公开(公告)号：US20070189351A1
公开(公告)日：2007-08-16
申请号：US11354662
申请日：2006-02-15
申请人： Robert Rice , Hagop Injeyan
发明人： Robert Rice , Hagop Injeyan
IPC分类号： H01S3/20 , H01S3/093
CPC分类号： H01S3/20 , H01S3/022 , H01S3/0402 , H01S3/0941 , H01S3/1611 , H01S3/169
摘要： A laser utilizing a liquid based lasing medium, comprising a colloidal suspension of selected solid state lasant nanoparticles in a selected liquid. Use of sufficiently small lasant nanoparticles allows relaxation of the requirement to match the refractive indices of the lasant and the liquid because the nanoparticles have a desirably low scattering loss even when the refractive indices are not perfectly matched. Therefore, higher laser powers are achievable without unwanted thermally induced birefringence and depolarization.
摘要翻译：一种使用基于液体的激光介质的激光，其包括在所选择的液体中的选定的固态惰性纳米颗粒的胶体悬浮液。使用足够小的惰性纳米粒子允许放松匹配奶油和液体的折射率的要求，因为即使当折射率不完全匹配时，纳米颗粒具有期望的低散射损失。因此，可以实现更高的激光功率，而无需不需要的热诱导双折射和去极化。

9. 发明授权

US07099356B2 Robust seeding technique for single mode laser oscillation 有权
标题翻译：用于单模激光振荡的鲁棒播种技术
公开(公告)号：US07099356B2
公开(公告)日：2006-08-29
申请号：US10440600
申请日：2003-05-19
申请人： Hiroshi Komine , James G. Ho , Hagop Injeyan , Stephen J. Brosnan
发明人： Hiroshi Komine , James G. Ho , Hagop Injeyan , Stephen J. Brosnan
IPC分类号： H01S3/098
CPC分类号： H01S3/10092
摘要： A method is provided for seeding laser system (10) for single longitudinal mode oscillation. The method includes coupling laser system (10) to be seeded for single mode output to a seed laser radiation source (12). Next, the frequency capture range (44) and spacing (46) of the axial modes (42) of the cavity (24) of the laser system (10) are determined. A seed spectrum (36) is then generated from the seed laser radiation source (12) with a bandwidth (40) corresponding to the axial mode spacing (46). The seed spectrum (36) includes a comb of discrete frequency components (38) with one or more of the discrete frequency components (38) being within the frequency capture range (44) of at least one of the axial modes (42). The seed spectrum (36) is then injected into the cavity (24) such that at least one of the axial modes (42) oscillates with the seed radiation.
摘要翻译：提供一种用于种子激光系统（10）用于单纵模振荡的方法。该方法包括将要种子化的激光系统（10）耦合到单模输出到种子激光辐射源（12）。接下来，确定激光系统（10）的空腔（24）的轴向模式（42）的频率捕获范围（44）和间隔（46）。然后从具有对应于轴向模式间隔（46）的带宽（40）从种子激光辐射源（12）产生种子谱（36）。种子谱（36）包括离散频率分量（38）的梳齿，其中一个或多个离散频率分量（38）在至少一个轴向模式（42）的频率捕获范围（44）内。然后将种子光谱（36）注入到空腔（24）中，使得轴向模式（42）中的至少一个与种子辐射振荡。

10. 发明申请

US20080170289A1 Multimode raman waveguide amplifier 审中-公开
标题翻译：多模拉曼波导放大器
公开(公告)号：US20080170289A1
公开(公告)日：2008-07-17
申请号：US11653818
申请日：2007-01-16
申请人： Robert Rex Rice , Hagop Injeyan , Hiroshi Komine , Joseph M. Fukumoto , Bahram Jalali
发明人： Robert Rex Rice , Hagop Injeyan , Hiroshi Komine , Joseph M. Fukumoto , Bahram Jalali
IPC分类号： H01S3/30
CPC分类号： H01S3/30 , H01S3/042 , H01S3/0632 , H01S3/09408 , H01S3/09415
摘要： A Raman waveguide amplifier includes a waveguide comprising a core of a Raman-active medium dimensioned and configured as a self-imaging multimode waveguide. At least one input signal is coupled into the core at a wavelength within a Raman gain spectrum of the Raman-active medium relative to at least one pump beam. The pump beam is coupled into the core so as to amplify the at least one input signal via stimulated Raman scattering to provide an output signal corresponding to an amplified replica of the at least one input signal.
摘要翻译：拉曼波导放大器包括波导，其包括尺寸为并且被配置为自成像多模波导的拉曼有源介质的核心。至少一个输入信号以相对于至少一个泵浦光束的拉曼活性介质的拉曼增益光谱内的波长耦合到芯中。泵浦光束耦合到核心中，以便通过受激拉曼散射放大至少一个输入信号，以提供对应于至少一个输入信号的放大副本的输出信号。

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