公开(公告)号：US5617442A

公开(公告)日：1997-04-01

申请号：US555007

申请日：1995-11-09

Applicant: Ryohei Tanuma

Inventor： Ryohei Tanuma

IPC: H01S3/02 ,  H01S3/06 ,  H01S3/093

CPC classification number: H01S3/093 ,  H01S3/025 ,  H01S3/0407 ,  H01S3/042 ,  H01S3/0606 ,  H01S3/0612 ,  H01S3/08095

Abstract: In a laser device having a solid-state laser medium of a slab or rod-shaped crystal, a flash lamp serving as an excitation-light source for the laser medium, and a reflector made of a foamed quartz glass for injecting light produced by the light source into the laser medium, an insulator made from a foamed glass is utilized to improve the efficiency of light injection and the resulting beam quality. In addition, where the laser medium is doped with Nd.sup.3+, a wavelength conversion filter made of a material doped with Cr.sup.3+ or Ti.sup.3+ is utilized to convert most of the excitation light into a wavelength most suitable for exciting the laser medium. Foamed quartz glass is preferred also as the material for the inner surface of an integrating sphere for optical measurement.

Abstract translation: 在具有板状或棒状晶体的固体激光介质的激光装置中，作为激光介质的激发光源的闪光灯和由发泡石英玻璃制成的反射镜，该发光石英玻璃用于注入由 光源进入激光介质，使用由泡沫玻璃制成的绝缘体来提高光注入的效率和所得到的光束质量。 此外，在激光介质掺杂有Nd 3+的情况下，利用由掺杂有Cr 3+或Ti 3+的材料制成的波长转换滤波器将大部分激发光转换成最适于激发激光介质的波长。 发泡石英玻璃也优选作为用于光学测量的积分球的内表面的材料。

公开(公告)号：US5402438A

公开(公告)日：1995-03-28

申请号：US228082

申请日：1994-04-15

Applicant: Ryohei Tanuma

Inventor： Ryohei Tanuma

IPC: G02B6/42 ,  H01S3/06 ,  H01S3/08

CPC classification number: H01S3/0804 ,  G02B6/4206 ,  G02B6/4203 ,  H01S3/005 ,  H01S3/0606 ,  H01S3/061 ,  H01S3/08068

Abstract: For high energy density and improved processing performance of a solid-state laser, the product .theta.d of a laser beam with divergence .theta. and beam diameter "d" at the beam waist is reduced. Formation of an non-oscillating region as in an output mirror with a pinhole is prevented by use of a hole-type mirror with a central region having reduced reflectance. For increased range of stable oscillation, a beam expander is interposed between a laser medium and the output mirror. The focused beam of a slab laser is made circular by using a columnar light-guiding path on the output side of the output mirror. A laser beam is more readily admitted into an optical fiber by use of a conical light-guiding path. With a hole-type output mirror, two-component laser output from a slab laser has very small .theta.d values.

Abstract translation: 对于固态激光器的高能量密度和改进的处理性能，减小了具有发散度θ的激光束和光束腰部的光束直径“d”的产品theta d。 通过使用具有反射率降低的中心区域的孔型反射镜来防止形成具有针孔的输出反射镜中的非振荡区域。 为了增加稳定振荡的范围，在激光介质和输出反射镜之间插入光束扩展器。 通过在输出反射镜的输出侧使用柱状导光路径，将板状激光的聚焦光束制成圆形。 激光束通过使用锥形导光路径更容易地进入光纤。 使用孔型输出镜，来自平板激光器的双分量激光输出具有非常小的θd值。

公开(公告)号：US5483374A

公开(公告)日：1996-01-09

申请号：US35972

申请日：1993-03-23

Applicant: Ryohei Tanuma

Inventor： Ryohei Tanuma

IPC: G02F1/35 ,  G02F1/37 ,  G02F1/39 ,  H01S3/08 ,  H01S3/108 ,  H01S3/109 ,  H01S5/00

CPC classification number: G02F1/37 ,  G02F1/39 ,  G02F2001/3542

Abstract: An optical resonator which is unstable with respect to laser light whose wavelength is to be converted includes a pair of confocal, coaxial curved mirrors. A nonlinear optical medium, e.g., lithium niobate, is disposed between the mirrors. Laser light injected into the optical resonator becomes concentrated in the vicinity of the optical axis, for highly efficient wavelength conversion.

Abstract translation: 相对于要波长变换的激光不稳定的光学谐振器包括一对共焦同轴弯曲镜。 诸如铌酸锂的非线性光学介质设置在反射镜之间。 注入光谐振器的激光在光轴附近集中，用于高效的波长转换。

公开(公告)号：US4958356A

公开(公告)日：1990-09-18

申请号：US416964

申请日：1989-10-04

Applicant: Ryohei Tanuma

Inventor： Ryohei Tanuma

IPC: H01S3/097 ,  H01S3/03 ,  H01S3/036 ,  H01S3/0977 ,  H01S3/22 ,  H01S3/225

CPC classification number: H01S3/036 ,  H01S3/225

Abstract: An excimer laser apparatus with an HCl generator. The HCl generator is constructed so that HCl gas is generated by the reaction of a fixed concentration of hydrogen gas in the laser gas mixture with an equivalent amount of metallic chlorides. The reaction occurs at a preset temperature, and the metallic chlorides may be either in the laser gas chamber or in the circulation line of the laser gas. Consequently, the HCl required for laser generation is continuously formed by the H.sub.2 reduction of the metallic chlorides. The HCl loss due to the formation of impurities is automatically replenished to maintain a constant concentration of HCl in the laser gas, which results in stable laser generation. This simplified and dependable excimer laser apparatus can be operated continuously for a long time, since it is not necessary to measure and replenish the HCl lost due to the formation of impurities. Furthermore, instead of using a bomb for the highly toxic HCl gas, a bomb for He mixed with H.sub.2 carrier gas, which has a much lower explosion limit, can be used for this safe excimer laser apparatus.

Abstract translation: 具有HCl发生器的准分子激光装置。 HCl发生器被构造成使得通过激光气体混合物中固定浓度的氢气与等量的金属氯化物的反应产生HCl气体。 反应发生在预设的温度下，金属氯化物可以在激光气体室中或在激光气体的循环管线中。 因此，通过金属氯化物的H 2还原连续地形成激光产生所需的HCl。 由于形成杂质而导致的HCl损失被自动补充，以保持激光气体中恒定浓度的HCl，这导致激光产生的稳定。 这种简化且可靠的准分子激光装置可以长时间连续运行，因为不需要测量和补充由于杂质形成而导致的HCl损失。 此外，为了安全的准分子激光装置，可以使用与使用爆炸极低爆炸极限的H 2载气混合的He的炸弹，而不是使用炸药用于高毒性的HCl气体。

公开(公告)号：US5581569A

公开(公告)日：1996-12-03

申请号：US420500

申请日：1995-04-12

Applicant: Ryohei Tanuma

Inventor： Ryohei Tanuma

IPC: H01S3/04 ,  H01S3/042 ,  H01S3/06 ,  H01S3/08 ,  H01S3/094 ,  H01S3/0941 ,  H01S3/17 ,  H01S3/16

CPC classification number: H01S3/042 ,  H01S3/0602 ,  H01S3/025 ,  H01S3/0405 ,  H01S3/08072 ,  H01S3/0941 ,  H01S3/173

Abstract: A solid state laser apparatus includes a laser medium of a uniaxial crystal, such as a fluoride crystal, having a negative temperature variation ratio of refractive index, laser diodes for optically pumping the laser medium, a set of mirrors positioned at two longitudinal ends of the laser medium for oscillating the light in the laser medium and outputting a beam, and a system for cooling the laser medium. The thermal lens effect is suppressed by causing a thermal gradient to exist along only one chosen axis of the laser medium and eliminating the thermal lens diopter along the chosen axis by optimizing a ratio L/D of length L and diameter D of the laser medium.

Abstract translation: 固体激光装置包括具有负温度变化率的折射率的单晶晶体的激光介质，例如氟化物晶体的激光介质，用于光学泵浦激光介质的激光二极管，位于所述激光介质的两个纵向端的一组反射镜 用于在激光介质中振荡光并输出光束的激光介质，以及用于冷却激光介质的系统。 通过使激光介质沿着选定的一个轴线存在热梯度来抑制热透镜效应，并且通过优化激光介质的长度L和直径D的比率L / D来消除所选择的轴上的热透镜屈光度。

公开(公告)号：US5355246A

公开(公告)日：1994-10-11

申请号：US593667

申请日：1990-10-05

Applicant: Ryohei Tanuma

Inventor： Ryohei Tanuma

IPC: G02F1/37 ,  H03F7/00 ,  G02F1/35

CPC classification number: G02F1/37

Abstract: A change in the wavelength of a laser beam is achieved by causing the beam to have a conical wavefront and applying it to a nonlinear crystal so that the beam converges along the center axis producing an output beam of a different wavelength. The conical wavefront is achieved in wavefront conversion means by use of lenses, mirrors and crystals with conical surfaces. Adjustability is provided by diverging the beam first and then converging it, with adjustment in the spacing between the divergence means and convergence means of a wavefront conversion means.

Abstract translation: 通过使光束具有锥形波前并将其施加到非线性晶体，使得光束沿着中心轴会聚，产生不同波长的输出光束，来实现激光束波长的变化。 通过使用透镜，反射镜和具有圆锥形表面的晶体，在波前转换装置中实现锥形波前。 通过使波束首先发散然后使其会聚，通过调整发散装置与波前转换装置的收敛装置之间的间距来提供可调性。

公开(公告)号：US5581573A

公开(公告)日：1996-12-03

申请号：US421118

申请日：1995-04-13

Applicant: Ryohei Tanuma

Inventor： Ryohei Tanuma

IPC: H01S3/02 ,  H01S3/06 ,  H01S3/093

CPC classification number: H01S3/093 ,  H01S3/025 ,  H01S3/0407 ,  H01S3/042 ,  H01S3/0606 ,  H01S3/0612 ,  H01S3/08095

Abstract: In a laser device having a solid-state laser medium of a slab or rod-shaped crystal, a flash lamp serving as an excitation-light source for the laser medium, and a reflector made of a foamed quartz glass for injecting light produced by the light source into the laser medium, an insulator made from a foamed glass is utilized to improve the efficiency of light injection and the resulting beam quality. In addition, where the laser medium is doped with Nd.sup.3+, a wavelength conversion filter made of a material doped with Cr.sup.3+ or Ti.sup.3+ is utilized to convert most of the excitation light into a wavelength most suitable for exciting the laser medium. Foamed quartz glass is preferred also as the material for the inner surface of an integrating sphere for optical measurement.

Abstract translation: 在具有板状或棒状晶体的固体激光介质的激光装置中，作为激光介质的激发光源的闪光灯和由发泡石英玻璃制成的反射镜，该发光石英玻璃用于注入由 光源进入激光介质，使用由泡沫玻璃制成的绝缘体来提高光注入的效率和所得到的光束质量。 此外，在激光介质掺杂有Nd 3+的情况下，利用由掺杂有Cr 3+或Ti 3+的材料制成的波长转换滤波器将大部分激发光转换成最适于激发激光介质的波长。 发泡石英玻璃也优选作为用于光学测量的积分球的内表面的材料。

公开(公告)号：US5561550A

公开(公告)日：1996-10-01

申请号：US477443

申请日：1995-06-07

Applicant: Ryohei Tanuma

Inventor： Ryohei Tanuma

IPC: G02F1/35 ,  G02F1/37 ,  G02F1/39 ,  H01S3/08 ,  H01S3/108 ,  H01S3/109 ,  H01S5/00

CPC classification number: G02F1/37 ,  G02F1/39 ,  G02F2001/3542

Abstract: An optical resonator which is unstable with respect to laser light whose wavelength is to be converted includes a pair of confocal, coaxial curved mirrors. A nonlinear optical medium, e.g., lithium niobate, is disposed between the mirrors. Laser light injected into the optical resonator becomes concentrated in the vicinity of the optical axis, for highly efficient wavelength conversion.

Abstract translation: 相对于要波长变换的激光不稳定的光学谐振器包括一对共焦同轴弯曲镜。 诸如铌酸锂的非线性光学介质设置在反射镜之间。 注入光谐振器的激光在光轴附近集中，用于高效的波长转换。

公开(公告)号：US5541765A

公开(公告)日：1996-07-30

申请号：US238711

申请日：1994-05-05

Applicant: Ryohei Tanuma

Inventor： Ryohei Tanuma

IPC: G02F1/37 ,  H03F7/00 ,  G02F1/35 ,  H01S3/10

CPC classification number: G02F1/37

Abstract: A change in the wavelength of a laser beam is achieved by causing the beam to have a conical wavefront and applying it to a nonlinear crystal so that the beam converges along the center axis producing an output beam of a different wavelength. The conical wavefront is achieved in wavefront conversion means by use of lenses, mirrors and crystals with conical surfaces. Adjustability is provided by diverging the beam first and then converging it, with adjustment in the spacing between the divergence means and convergence means of a wavefront conversion means.

Abstract translation: 通过使光束具有锥形波前并将其施加到非线性晶体，使得光束沿着中心轴会聚，产生不同波长的输出光束，来实现激光束波长的变化。 通过使用透镜，反射镜和具有圆锥形表面的晶体，在波前转换装置中实现锥形波前。 通过使波束首先发散然后使其会聚，通过调整发散装置与波前转换装置的收敛装置之间的间距来提供可调性。

公开(公告)号：US5490161A

公开(公告)日：1996-02-06

申请号：US228223

申请日：1994-04-15

Applicant: Ryohei Tanuma

Inventor： Ryohei Tanuma

IPC: H01S3/02 ,  H01S3/06 ,  H01S3/093

CPC classification number: H01S3/093 ,  H01S3/025 ,  H01S3/0606 ,  H01S3/08095

Abstract: In a high-efficiency solid-state laser device with an optical resonator including a solid-state laser medium in the form of a slab crystal, for example, a flash lamp serves as the excitation light source of the solid-state laser medium, and a reflector serves for injecting light produced by the light source into the laser medium. A reflector made of a foamed quartz glass has high diffusion reflectance over a wide range of wavelengths from the infrared to the ultraviolet. Foamed quartz glass is preferred also as an integrating sphere material for optical measurement.

Abstract translation: 在具有包括板状晶体形式的固体激光介质的光学谐振器的高效率固体激光装置中，例如，闪光灯用作固体激光介质的激发光源，以及 反射器用于将由光源产生的光注入到激光介质中。 由发泡石英玻璃制成的反射镜在从红外线到紫外线的宽波长范围内具有高扩散反射率。 发泡石英玻璃也优选作为用于光学测量的积分球材料。